./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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.06.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:37:52,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:37:52,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:37:52,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:37:52,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:37:52,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:37:52,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:37:52,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:37:52,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:37:52,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:37:52,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:37:52,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:37:52,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:37:52,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:37:52,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:37:52,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:37:52,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:37:52,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:37:52,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:37:52,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:37:52,582 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:37:52,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:37:52,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:37:52,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:37:52,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:37:52,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:37:52,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:37:52,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:37:52,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:37:52,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:37:52,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:37:52,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:37:52,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:37:52,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:37:52,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:37:52,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:37:52,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:37:52,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:37:52,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:37:52,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:37:52,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:37:52,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:37:52,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:37:52,641 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:37:52,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:37:52,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:37:52,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:37:52,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:37:52,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:37:52,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:37:52,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:37:52,644 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:37:52,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:37:52,645 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:37:52,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:37:52,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:37:52,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:37:52,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:37:52,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:37:52,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:37:52,647 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:37:52,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:37:52,648 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:37:52,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:37:52,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:37:52,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:37:52,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:37:52,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:37:52,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:37:52,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:37:52,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:37:52,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:37:52,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:37:52,650 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:37:52,651 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:37:52,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:37:52,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2022-07-20 22:37:52,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:37:52,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:37:52,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:37:52,973 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:37:52,974 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:37:52,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2022-07-20 22:37:53,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cf10a15e/5ca0b8cc119047a8bdda83a40143c9e8/FLAG3139db619 [2022-07-20 22:37:53,574 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:37:53,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2022-07-20 22:37:53,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cf10a15e/5ca0b8cc119047a8bdda83a40143c9e8/FLAG3139db619 [2022-07-20 22:37:53,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cf10a15e/5ca0b8cc119047a8bdda83a40143c9e8 [2022-07-20 22:37:53,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:37:53,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:37:53,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:37:53,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:37:53,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:37:53,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:37:53" (1/1) ... [2022-07-20 22:37:53,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2781036d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:53, skipping insertion in model container [2022-07-20 22:37:53,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:37:53" (1/1) ... [2022-07-20 22:37:53,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:37:53,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:37:54,297 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.06.i.cil-2.c[78808,78821] [2022-07-20 22:37:54,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:37:54,327 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:37:54,448 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.06.i.cil-2.c[78808,78821] [2022-07-20 22:37:54,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:37:54,485 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:37:54,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54 WrapperNode [2022-07-20 22:37:54,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:37:54,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:37:54,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:37:54,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:37:54,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,571 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 816 [2022-07-20 22:37:54,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:37:54,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:37:54,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:37:54,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:37:54,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:37:54,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:37:54,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:37:54,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:37:54,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (1/1) ... [2022-07-20 22:37:54,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:37:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:37:54,671 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) [2022-07-20 22:37:54,674 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 [2022-07-20 22:37:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:37:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:37:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:37:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:37:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:37:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:37:54,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:37:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:37:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:37:54,841 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:37:54,842 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:37:54,859 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:37:57,426 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-20 22:37:57,427 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-20 22:37:57,427 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:37:57,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:37:57,438 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:37:57,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:37:57 BoogieIcfgContainer [2022-07-20 22:37:57,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:37:57,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:37:57,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:37:57,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:37:57,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:37:53" (1/3) ... [2022-07-20 22:37:57,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138e1917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:37:57, skipping insertion in model container [2022-07-20 22:37:57,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:37:54" (2/3) ... [2022-07-20 22:37:57,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138e1917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:37:57, skipping insertion in model container [2022-07-20 22:37:57,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:37:57" (3/3) ... [2022-07-20 22:37:57,450 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2022-07-20 22:37:57,463 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:37:57,464 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:37:57,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:37:57,523 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@61fc4a9d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6844bbb4 [2022-07-20 22:37:57,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:37:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 22:37:57,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:57,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:57,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 271453869, now seen corresponding path program 1 times [2022-07-20 22:37:57,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:57,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066297538] [2022-07-20 22:37:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:58,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:58,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066297538] [2022-07-20 22:37:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066297538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:58,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:58,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278181992] [2022-07-20 22:37:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:58,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:58,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:58,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:58,055 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:59,008 INFO L93 Difference]: Finished difference Result 455 states and 784 transitions. [2022-07-20 22:37:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-07-20 22:37:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:59,021 INFO L225 Difference]: With dead ends: 455 [2022-07-20 22:37:59,021 INFO L226 Difference]: Without dead ends: 278 [2022-07-20 22:37:59,024 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 [2022-07-20 22:37:59,028 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 176 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:59,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 511 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:37:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-20 22:37:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 189. [2022-07-20 22:37:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.6329787234042554) internal successors, (307), 188 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 307 transitions. [2022-07-20 22:37:59,072 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 307 transitions. Word has length 47 [2022-07-20 22:37:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:59,073 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 307 transitions. [2022-07-20 22:37:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 307 transitions. [2022-07-20 22:37:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 22:37:59,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:59,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:37:59,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -72299220, now seen corresponding path program 1 times [2022-07-20 22:37:59,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633899964] [2022-07-20 22:37:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:59,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:37:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:59,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633899964] [2022-07-20 22:37:59,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633899964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:59,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631788868] [2022-07-20 22:37:59,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:59,304 INFO L87 Difference]: Start difference. First operand 189 states and 307 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:37:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:59,992 INFO L93 Difference]: Finished difference Result 396 states and 641 transitions. [2022-07-20 22:37:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-07-20 22:37:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:59,994 INFO L225 Difference]: With dead ends: 396 [2022-07-20 22:37:59,995 INFO L226 Difference]: Without dead ends: 217 [2022-07-20 22:37:59,995 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 [2022-07-20 22:37:59,996 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 22 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:59,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 541 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:37:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-20 22:38:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 200. [2022-07-20 22:38:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.6381909547738693) internal successors, (326), 199 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) [2022-07-20 22:38:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 326 transitions. [2022-07-20 22:38:00,035 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 326 transitions. Word has length 48 [2022-07-20 22:38:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:00,036 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 326 transitions. [2022-07-20 22:38:00,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 326 transitions. [2022-07-20 22:38:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:38:00,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:00,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:38:00,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:00,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1865586560, now seen corresponding path program 1 times [2022-07-20 22:38:00,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322504497] [2022-07-20 22:38:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:00,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:00,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322504497] [2022-07-20 22:38:00,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322504497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:00,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:00,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:00,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060601089] [2022-07-20 22:38:00,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:00,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:00,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:00,218 INFO L87 Difference]: Start difference. First operand 200 states and 326 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:01,119 INFO L93 Difference]: Finished difference Result 546 states and 895 transitions. [2022-07-20 22:38:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-20 22:38:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:01,122 INFO L225 Difference]: With dead ends: 546 [2022-07-20 22:38:01,122 INFO L226 Difference]: Without dead ends: 367 [2022-07-20 22:38:01,123 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 [2022-07-20 22:38:01,124 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 165 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:01,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 730 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:38:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-20 22:38:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 232. [2022-07-20 22:38:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.632034632034632) internal successors, (377), 231 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 377 transitions. [2022-07-20 22:38:01,138 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 377 transitions. Word has length 61 [2022-07-20 22:38:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:01,138 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 377 transitions. [2022-07-20 22:38:01,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 377 transitions. [2022-07-20 22:38:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:38:01,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:01,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:01,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:38:01,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1829403441, now seen corresponding path program 1 times [2022-07-20 22:38:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961825304] [2022-07-20 22:38:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:01,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961825304] [2022-07-20 22:38:01,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961825304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:01,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:01,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:01,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536725886] [2022-07-20 22:38:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:01,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:01,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:01,251 INFO L87 Difference]: Start difference. First operand 232 states and 377 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:01,832 INFO L93 Difference]: Finished difference Result 554 states and 898 transitions. [2022-07-20 22:38:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 22:38:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:01,834 INFO L225 Difference]: With dead ends: 554 [2022-07-20 22:38:01,835 INFO L226 Difference]: Without dead ends: 343 [2022-07-20 22:38:01,835 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 [2022-07-20 22:38:01,836 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 170 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:01,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:38:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-20 22:38:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 232. [2022-07-20 22:38:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.6147186147186148) internal successors, (373), 231 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 373 transitions. [2022-07-20 22:38:01,860 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 373 transitions. Word has length 62 [2022-07-20 22:38:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:01,863 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 373 transitions. [2022-07-20 22:38:01,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 373 transitions. [2022-07-20 22:38:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:38:01,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:01,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:01,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:38:01,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:01,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1620873285, now seen corresponding path program 1 times [2022-07-20 22:38:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:01,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93346484] [2022-07-20 22:38:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:02,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93346484] [2022-07-20 22:38:02,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93346484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:02,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:02,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:02,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006008135] [2022-07-20 22:38:02,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:02,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:02,028 INFO L87 Difference]: Start difference. First operand 232 states and 373 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:02,601 INFO L93 Difference]: Finished difference Result 459 states and 735 transitions. [2022-07-20 22:38:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 22:38:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:02,603 INFO L225 Difference]: With dead ends: 459 [2022-07-20 22:38:02,603 INFO L226 Difference]: Without dead ends: 248 [2022-07-20 22:38:02,604 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 [2022-07-20 22:38:02,605 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:02,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 545 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:38:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-20 22:38:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 232. [2022-07-20 22:38:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.6103896103896105) internal successors, (372), 231 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 372 transitions. [2022-07-20 22:38:02,615 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 372 transitions. Word has length 62 [2022-07-20 22:38:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:02,615 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 372 transitions. [2022-07-20 22:38:02,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 372 transitions. [2022-07-20 22:38:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:38:02,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:02,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:38:02,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 519909764, now seen corresponding path program 1 times [2022-07-20 22:38:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002052170] [2022-07-20 22:38:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:02,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:02,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002052170] [2022-07-20 22:38:02,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002052170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:02,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:02,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:02,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834692256] [2022-07-20 22:38:02,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:02,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:02,771 INFO L87 Difference]: Start difference. First operand 232 states and 372 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:03,237 INFO L93 Difference]: Finished difference Result 458 states and 733 transitions. [2022-07-20 22:38:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 22:38:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:03,239 INFO L225 Difference]: With dead ends: 458 [2022-07-20 22:38:03,239 INFO L226 Difference]: Without dead ends: 247 [2022-07-20 22:38:03,240 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 [2022-07-20 22:38:03,241 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 19 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:03,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 547 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:38:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-20 22:38:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2022-07-20 22:38:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.606060606060606) internal successors, (371), 231 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 371 transitions. [2022-07-20 22:38:03,247 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 371 transitions. Word has length 62 [2022-07-20 22:38:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:03,247 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 371 transitions. [2022-07-20 22:38:03,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 371 transitions. [2022-07-20 22:38:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:38:03,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:03,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:03,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:38:03,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1154887876, now seen corresponding path program 1 times [2022-07-20 22:38:03,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:03,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252570715] [2022-07-20 22:38:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:03,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:03,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252570715] [2022-07-20 22:38:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252570715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:03,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:03,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532478320] [2022-07-20 22:38:03,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:03,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:03,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:03,372 INFO L87 Difference]: Start difference. First operand 232 states and 371 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:04,042 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2022-07-20 22:38:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:04,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 22:38:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:04,045 INFO L225 Difference]: With dead ends: 554 [2022-07-20 22:38:04,045 INFO L226 Difference]: Without dead ends: 343 [2022-07-20 22:38:04,045 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 [2022-07-20 22:38:04,046 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 163 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:04,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:38:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-20 22:38:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2022-07-20 22:38:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5948275862068966) internal successors, (370), 232 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 370 transitions. [2022-07-20 22:38:04,054 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 370 transitions. Word has length 62 [2022-07-20 22:38:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:04,054 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 370 transitions. [2022-07-20 22:38:04,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 370 transitions. [2022-07-20 22:38:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:38:04,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:04,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:04,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:38:04,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1662386487, now seen corresponding path program 1 times [2022-07-20 22:38:04,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:04,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616365497] [2022-07-20 22:38:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:04,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:04,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616365497] [2022-07-20 22:38:04,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616365497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:04,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:04,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466311771] [2022-07-20 22:38:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:04,187 INFO L87 Difference]: Start difference. First operand 233 states and 370 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:04,744 INFO L93 Difference]: Finished difference Result 458 states and 729 transitions. [2022-07-20 22:38:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 22:38:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:04,746 INFO L225 Difference]: With dead ends: 458 [2022-07-20 22:38:04,746 INFO L226 Difference]: Without dead ends: 246 [2022-07-20 22:38:04,747 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 [2022-07-20 22:38:04,747 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 22 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:04,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:38:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-20 22:38:04,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2022-07-20 22:38:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5905172413793103) internal successors, (369), 232 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 369 transitions. [2022-07-20 22:38:04,754 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 369 transitions. Word has length 63 [2022-07-20 22:38:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:04,754 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 369 transitions. [2022-07-20 22:38:04,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 369 transitions. [2022-07-20 22:38:04,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 22:38:04,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:04,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:04,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:38:04,756 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -838476330, now seen corresponding path program 1 times [2022-07-20 22:38:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:04,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467382045] [2022-07-20 22:38:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:04,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:04,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467382045] [2022-07-20 22:38:04,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467382045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:04,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:04,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:04,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803856499] [2022-07-20 22:38:04,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:04,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:04,848 INFO L87 Difference]: Start difference. First operand 233 states and 369 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:05,389 INFO L93 Difference]: Finished difference Result 458 states and 728 transitions. [2022-07-20 22:38:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-20 22:38:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:05,391 INFO L225 Difference]: With dead ends: 458 [2022-07-20 22:38:05,391 INFO L226 Difference]: Without dead ends: 246 [2022-07-20 22:38:05,392 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 [2022-07-20 22:38:05,392 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 20 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:05,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:38:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-20 22:38:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2022-07-20 22:38:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5862068965517242) internal successors, (368), 232 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 368 transitions. [2022-07-20 22:38:05,399 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 368 transitions. Word has length 64 [2022-07-20 22:38:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:05,399 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 368 transitions. [2022-07-20 22:38:05,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 368 transitions. [2022-07-20 22:38:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:38:05,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:05,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:05,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:38:05,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2036454322, now seen corresponding path program 1 times [2022-07-20 22:38:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:05,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131970530] [2022-07-20 22:38:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:05,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:05,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131970530] [2022-07-20 22:38:05,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131970530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:05,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:05,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426173572] [2022-07-20 22:38:05,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:05,498 INFO L87 Difference]: Start difference. First operand 233 states and 368 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:06,437 INFO L93 Difference]: Finished difference Result 448 states and 714 transitions. [2022-07-20 22:38:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-20 22:38:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:06,439 INFO L225 Difference]: With dead ends: 448 [2022-07-20 22:38:06,439 INFO L226 Difference]: Without dead ends: 236 [2022-07-20 22:38:06,440 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 [2022-07-20 22:38:06,440 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 11 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:06,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 565 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:38:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-20 22:38:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2022-07-20 22:38:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.581896551724138) internal successors, (367), 232 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 367 transitions. [2022-07-20 22:38:06,446 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 367 transitions. Word has length 65 [2022-07-20 22:38:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:06,446 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 367 transitions. [2022-07-20 22:38:06,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 367 transitions. [2022-07-20 22:38:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:38:06,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:06,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:38:06,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1556245834, now seen corresponding path program 1 times [2022-07-20 22:38:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473614147] [2022-07-20 22:38:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:06,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473614147] [2022-07-20 22:38:06,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473614147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:06,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:06,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:06,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243077729] [2022-07-20 22:38:06,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:06,562 INFO L87 Difference]: Start difference. First operand 233 states and 367 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:07,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:07,853 INFO L93 Difference]: Finished difference Result 485 states and 769 transitions. [2022-07-20 22:38:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-20 22:38:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:07,856 INFO L225 Difference]: With dead ends: 485 [2022-07-20 22:38:07,856 INFO L226 Difference]: Without dead ends: 273 [2022-07-20 22:38:07,856 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 [2022-07-20 22:38:07,857 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 31 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:07,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 569 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:38:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-20 22:38:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 255. [2022-07-20 22:38:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.5826771653543308) internal successors, (402), 254 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 402 transitions. [2022-07-20 22:38:07,864 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 402 transitions. Word has length 65 [2022-07-20 22:38:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:07,864 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 402 transitions. [2022-07-20 22:38:07,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 402 transitions. [2022-07-20 22:38:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 22:38:07,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:07,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:07,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:38:07,866 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -120356007, now seen corresponding path program 1 times [2022-07-20 22:38:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:07,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309892407] [2022-07-20 22:38:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:07,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:08,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:08,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309892407] [2022-07-20 22:38:08,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309892407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:08,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:08,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706772569] [2022-07-20 22:38:08,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:08,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:08,003 INFO L87 Difference]: Start difference. First operand 255 states and 402 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:08,863 INFO L93 Difference]: Finished difference Result 599 states and 953 transitions. [2022-07-20 22:38:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:08,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 22:38:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:08,866 INFO L225 Difference]: With dead ends: 599 [2022-07-20 22:38:08,866 INFO L226 Difference]: Without dead ends: 365 [2022-07-20 22:38:08,866 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 [2022-07-20 22:38:08,867 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 168 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:08,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:38:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-20 22:38:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2022-07-20 22:38:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 254 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 398 transitions. [2022-07-20 22:38:08,875 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 398 transitions. Word has length 79 [2022-07-20 22:38:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:08,875 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 398 transitions. [2022-07-20 22:38:08,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 398 transitions. [2022-07-20 22:38:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 22:38:08,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:08,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:08,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:38:08,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2020427042, now seen corresponding path program 1 times [2022-07-20 22:38:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:08,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410407894] [2022-07-20 22:38:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:08,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:08,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:08,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410407894] [2022-07-20 22:38:08,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410407894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:08,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:08,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:08,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582123864] [2022-07-20 22:38:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:08,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:08,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:08,968 INFO L87 Difference]: Start difference. First operand 255 states and 398 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:10,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:10,407 INFO L93 Difference]: Finished difference Result 506 states and 794 transitions. [2022-07-20 22:38:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 22:38:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:10,409 INFO L225 Difference]: With dead ends: 506 [2022-07-20 22:38:10,409 INFO L226 Difference]: Without dead ends: 272 [2022-07-20 22:38:10,409 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 [2022-07-20 22:38:10,410 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 33 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:10,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 571 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:38:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-20 22:38:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 255. [2022-07-20 22:38:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.562992125984252) internal successors, (397), 254 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 397 transitions. [2022-07-20 22:38:10,416 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 397 transitions. Word has length 79 [2022-07-20 22:38:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:10,417 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 397 transitions. [2022-07-20 22:38:10,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 397 transitions. [2022-07-20 22:38:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 22:38:10,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:10,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:10,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:38:10,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:10,419 INFO L85 PathProgramCache]: Analyzing trace with hash 933781849, now seen corresponding path program 1 times [2022-07-20 22:38:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:10,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909436441] [2022-07-20 22:38:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:10,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:10,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:10,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909436441] [2022-07-20 22:38:10,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909436441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:10,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:10,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367958370] [2022-07-20 22:38:10,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:10,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:10,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:10,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:10,521 INFO L87 Difference]: Start difference. First operand 255 states and 397 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:12,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:12,636 INFO L93 Difference]: Finished difference Result 599 states and 943 transitions. [2022-07-20 22:38:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-20 22:38:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:12,638 INFO L225 Difference]: With dead ends: 599 [2022-07-20 22:38:12,639 INFO L226 Difference]: Without dead ends: 365 [2022-07-20 22:38:12,639 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 [2022-07-20 22:38:12,640 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 166 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:12,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:38:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-20 22:38:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2022-07-20 22:38:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.547244094488189) internal successors, (393), 254 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 393 transitions. [2022-07-20 22:38:12,647 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 393 transitions. Word has length 80 [2022-07-20 22:38:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:12,647 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 393 transitions. [2022-07-20 22:38:12,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 393 transitions. [2022-07-20 22:38:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-20 22:38:12,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:12,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:12,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:38:12,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1950383628, now seen corresponding path program 1 times [2022-07-20 22:38:12,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:12,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254616212] [2022-07-20 22:38:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:12,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254616212] [2022-07-20 22:38:12,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254616212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:12,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:12,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789099006] [2022-07-20 22:38:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:12,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:12,757 INFO L87 Difference]: Start difference. First operand 255 states and 393 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:14,763 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 [] [2022-07-20 22:38:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:15,162 INFO L93 Difference]: Finished difference Result 599 states and 935 transitions. [2022-07-20 22:38:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-20 22:38:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:15,164 INFO L225 Difference]: With dead ends: 599 [2022-07-20 22:38:15,164 INFO L226 Difference]: Without dead ends: 365 [2022-07-20 22:38:15,164 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 [2022-07-20 22:38:15,165 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 164 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 406 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 [2022-07-20 22:38:15,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 406 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 22:38:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-20 22:38:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 255. [2022-07-20 22:38:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.531496062992126) internal successors, (389), 254 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 389 transitions. [2022-07-20 22:38:15,172 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 389 transitions. Word has length 81 [2022-07-20 22:38:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:15,172 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 389 transitions. [2022-07-20 22:38:15,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 389 transitions. [2022-07-20 22:38:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 22:38:15,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:15,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:15,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:38:15,174 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1927066452, now seen corresponding path program 1 times [2022-07-20 22:38:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:15,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556185054] [2022-07-20 22:38:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:15,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:38:15,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556185054] [2022-07-20 22:38:15,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556185054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:15,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:15,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782555286] [2022-07-20 22:38:15,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:15,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:15,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:15,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:15,263 INFO L87 Difference]: Start difference. First operand 255 states and 389 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:16,271 INFO L93 Difference]: Finished difference Result 589 states and 914 transitions. [2022-07-20 22:38:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:16,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2022-07-20 22:38:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:16,273 INFO L225 Difference]: With dead ends: 589 [2022-07-20 22:38:16,273 INFO L226 Difference]: Without dead ends: 355 [2022-07-20 22:38:16,274 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 [2022-07-20 22:38:16,274 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 155 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:16,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 426 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 22:38:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-20 22:38:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 255. [2022-07-20 22:38:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.515748031496063) internal successors, (385), 254 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 385 transitions. [2022-07-20 22:38:16,281 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 385 transitions. Word has length 82 [2022-07-20 22:38:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:16,281 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 385 transitions. [2022-07-20 22:38:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 385 transitions. [2022-07-20 22:38:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-20 22:38:16,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:16,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:16,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:38:16,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2120868205, now seen corresponding path program 1 times [2022-07-20 22:38:16,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:16,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044287172] [2022-07-20 22:38:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:16,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:16,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:16,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044287172] [2022-07-20 22:38:16,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044287172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:16,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:16,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464690883] [2022-07-20 22:38:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:16,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:16,380 INFO L87 Difference]: Start difference. First operand 255 states and 385 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:17,294 INFO L93 Difference]: Finished difference Result 589 states and 906 transitions. [2022-07-20 22:38:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-20 22:38:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:17,296 INFO L225 Difference]: With dead ends: 589 [2022-07-20 22:38:17,296 INFO L226 Difference]: Without dead ends: 355 [2022-07-20 22:38:17,297 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 [2022-07-20 22:38:17,297 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 129 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:17,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 456 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:38:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-20 22:38:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 278. [2022-07-20 22:38:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.552346570397112) internal successors, (430), 277 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 430 transitions. [2022-07-20 22:38:17,322 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 430 transitions. Word has length 87 [2022-07-20 22:38:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:17,322 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 430 transitions. [2022-07-20 22:38:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 430 transitions. [2022-07-20 22:38:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 22:38:17,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:17,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:17,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:38:17,325 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1055569381, now seen corresponding path program 1 times [2022-07-20 22:38:17,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:17,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043113191] [2022-07-20 22:38:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:17,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043113191] [2022-07-20 22:38:17,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043113191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:17,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:17,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344752200] [2022-07-20 22:38:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:17,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:17,438 INFO L87 Difference]: Start difference. First operand 278 states and 430 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:17,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:17,940 INFO L93 Difference]: Finished difference Result 625 states and 974 transitions. [2022-07-20 22:38:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:17,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-07-20 22:38:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:17,942 INFO L225 Difference]: With dead ends: 625 [2022-07-20 22:38:17,942 INFO L226 Difference]: Without dead ends: 368 [2022-07-20 22:38:17,943 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 [2022-07-20 22:38:17,943 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 90 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:17,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 547 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:38:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-20 22:38:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 312. [2022-07-20 22:38:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.5530546623794212) internal successors, (483), 311 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 483 transitions. [2022-07-20 22:38:17,951 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 483 transitions. Word has length 115 [2022-07-20 22:38:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:17,952 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 483 transitions. [2022-07-20 22:38:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 483 transitions. [2022-07-20 22:38:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 22:38:17,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:17,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:38:17,953 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash -978668583, now seen corresponding path program 1 times [2022-07-20 22:38:17,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:17,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027262330] [2022-07-20 22:38:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027262330] [2022-07-20 22:38:18,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027262330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:18,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:18,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:18,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577568345] [2022-07-20 22:38:18,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:18,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:18,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:18,119 INFO L87 Difference]: Start difference. First operand 312 states and 483 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:18,781 INFO L93 Difference]: Finished difference Result 756 states and 1184 transitions. [2022-07-20 22:38:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-07-20 22:38:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:18,784 INFO L225 Difference]: With dead ends: 756 [2022-07-20 22:38:18,784 INFO L226 Difference]: Without dead ends: 465 [2022-07-20 22:38:18,785 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 [2022-07-20 22:38:18,785 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 135 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:18,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 436 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:38:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-20 22:38:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 342. [2022-07-20 22:38:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5601173020527859) internal successors, (532), 341 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 532 transitions. [2022-07-20 22:38:18,796 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 532 transitions. Word has length 115 [2022-07-20 22:38:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:18,796 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 532 transitions. [2022-07-20 22:38:18,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 532 transitions. [2022-07-20 22:38:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 22:38:18,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:18,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:18,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:38:18,798 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1185621468, now seen corresponding path program 1 times [2022-07-20 22:38:18,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235889022] [2022-07-20 22:38:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:18,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235889022] [2022-07-20 22:38:18,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235889022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:18,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:18,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354897538] [2022-07-20 22:38:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:18,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:18,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:18,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:18,939 INFO L87 Difference]: Start difference. First operand 342 states and 532 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:19,778 INFO L93 Difference]: Finished difference Result 780 states and 1219 transitions. [2022-07-20 22:38:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-20 22:38:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:19,780 INFO L225 Difference]: With dead ends: 780 [2022-07-20 22:38:19,781 INFO L226 Difference]: Without dead ends: 459 [2022-07-20 22:38:19,781 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 [2022-07-20 22:38:19,782 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 131 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:19,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 424 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:38:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-20 22:38:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 379. [2022-07-20 22:38:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.5634920634920635) internal successors, (591), 378 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 591 transitions. [2022-07-20 22:38:19,791 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 591 transitions. Word has length 121 [2022-07-20 22:38:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:19,791 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 591 transitions. [2022-07-20 22:38:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 591 transitions. [2022-07-20 22:38:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 22:38:19,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:19,793 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:38:19,794 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1466195913, now seen corresponding path program 1 times [2022-07-20 22:38:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618827215] [2022-07-20 22:38:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:19,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618827215] [2022-07-20 22:38:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618827215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:19,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645454429] [2022-07-20 22:38:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:19,915 INFO L87 Difference]: Start difference. First operand 379 states and 591 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) [2022-07-20 22:38:21,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:21,539 INFO L93 Difference]: Finished difference Result 824 states and 1290 transitions. [2022-07-20 22:38:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:21,544 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 122 [2022-07-20 22:38:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:21,546 INFO L225 Difference]: With dead ends: 824 [2022-07-20 22:38:21,546 INFO L226 Difference]: Without dead ends: 466 [2022-07-20 22:38:21,546 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 [2022-07-20 22:38:21,547 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 79 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:21,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 549 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:38:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-20 22:38:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 419. [2022-07-20 22:38:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.5645933014354068) internal successors, (654), 418 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 654 transitions. [2022-07-20 22:38:21,557 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 654 transitions. Word has length 122 [2022-07-20 22:38:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:21,558 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 654 transitions. [2022-07-20 22:38:21,558 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) [2022-07-20 22:38:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 654 transitions. [2022-07-20 22:38:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 22:38:21,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:21,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:21,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:38:21,560 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1225956167, now seen corresponding path program 1 times [2022-07-20 22:38:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768034694] [2022-07-20 22:38:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:21,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:38:21,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768034694] [2022-07-20 22:38:21,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768034694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:21,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:21,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170132842] [2022-07-20 22:38:21,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:21,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:21,704 INFO L87 Difference]: Start difference. First operand 419 states and 654 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:23,254 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 [] [2022-07-20 22:38:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:23,468 INFO L93 Difference]: Finished difference Result 854 states and 1337 transitions. [2022-07-20 22:38:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-07-20 22:38:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:23,470 INFO L225 Difference]: With dead ends: 854 [2022-07-20 22:38:23,471 INFO L226 Difference]: Without dead ends: 456 [2022-07-20 22:38:23,471 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 [2022-07-20 22:38:23,472 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 28 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:23,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 649 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-20 22:38:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-20 22:38:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 443. [2022-07-20 22:38:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5588235294117647) internal successors, (689), 442 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 689 transitions. [2022-07-20 22:38:23,482 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 689 transitions. Word has length 122 [2022-07-20 22:38:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:23,483 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 689 transitions. [2022-07-20 22:38:23,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 689 transitions. [2022-07-20 22:38:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-20 22:38:23,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:23,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:23,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:38:23,485 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1414034971, now seen corresponding path program 1 times [2022-07-20 22:38:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:23,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329693311] [2022-07-20 22:38:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:38:23,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:23,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329693311] [2022-07-20 22:38:23,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329693311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:23,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:23,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181728327] [2022-07-20 22:38:23,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:23,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:23,616 INFO L87 Difference]: Start difference. First operand 443 states and 689 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) [2022-07-20 22:38:25,622 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 [] [2022-07-20 22:38:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:25,925 INFO L93 Difference]: Finished difference Result 903 states and 1407 transitions. [2022-07-20 22:38:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:25,925 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 129 [2022-07-20 22:38:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:25,927 INFO L225 Difference]: With dead ends: 903 [2022-07-20 22:38:25,927 INFO L226 Difference]: Without dead ends: 481 [2022-07-20 22:38:25,928 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 [2022-07-20 22:38:25,929 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 61 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:25,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 555 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-07-20 22:38:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 446. [2022-07-20 22:38:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5550561797752809) internal successors, (692), 445 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 692 transitions. [2022-07-20 22:38:25,940 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 692 transitions. Word has length 129 [2022-07-20 22:38:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:25,940 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 692 transitions. [2022-07-20 22:38:25,940 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) [2022-07-20 22:38:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 692 transitions. [2022-07-20 22:38:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-20 22:38:25,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:25,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:38:25,943 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 417072415, now seen corresponding path program 1 times [2022-07-20 22:38:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:25,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887506676] [2022-07-20 22:38:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:38:26,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887506676] [2022-07-20 22:38:26,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887506676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:26,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:26,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:26,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269080137] [2022-07-20 22:38:26,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:26,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:26,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:26,040 INFO L87 Difference]: Start difference. First operand 446 states and 692 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:27,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:38:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:27,847 INFO L93 Difference]: Finished difference Result 905 states and 1408 transitions. [2022-07-20 22:38:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-20 22:38:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:27,850 INFO L225 Difference]: With dead ends: 905 [2022-07-20 22:38:27,850 INFO L226 Difference]: Without dead ends: 480 [2022-07-20 22:38:27,850 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 [2022-07-20 22:38:27,851 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 83 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:27,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 557 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:38:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-07-20 22:38:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 446. [2022-07-20 22:38:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.552808988764045) internal successors, (691), 445 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 691 transitions. [2022-07-20 22:38:27,871 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 691 transitions. Word has length 136 [2022-07-20 22:38:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:27,872 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 691 transitions. [2022-07-20 22:38:27,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 691 transitions. [2022-07-20 22:38:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-20 22:38:27,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:27,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:27,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:38:27,874 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:27,875 INFO L85 PathProgramCache]: Analyzing trace with hash -466436575, now seen corresponding path program 1 times [2022-07-20 22:38:27,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:27,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863488273] [2022-07-20 22:38:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:27,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:38:27,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863488273] [2022-07-20 22:38:27,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863488273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:27,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:27,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163944435] [2022-07-20 22:38:27,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:27,978 INFO L87 Difference]: Start difference. First operand 446 states and 691 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:29,991 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 [] [2022-07-20 22:38:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:30,242 INFO L93 Difference]: Finished difference Result 883 states and 1374 transitions. [2022-07-20 22:38:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-20 22:38:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:30,245 INFO L225 Difference]: With dead ends: 883 [2022-07-20 22:38:30,245 INFO L226 Difference]: Without dead ends: 458 [2022-07-20 22:38:30,246 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 [2022-07-20 22:38:30,246 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 33 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:30,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 649 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:38:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-20 22:38:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 446. [2022-07-20 22:38:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.550561797752809) internal successors, (690), 445 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 690 transitions. [2022-07-20 22:38:30,256 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 690 transitions. Word has length 136 [2022-07-20 22:38:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:30,256 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 690 transitions. [2022-07-20 22:38:30,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 690 transitions. [2022-07-20 22:38:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 22:38:30,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:30,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:38:30,259 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 204789508, now seen corresponding path program 1 times [2022-07-20 22:38:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033220719] [2022-07-20 22:38:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:30,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:38:30,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033220719] [2022-07-20 22:38:30,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033220719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:30,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:30,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280291092] [2022-07-20 22:38:30,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:30,387 INFO L87 Difference]: Start difference. First operand 446 states and 690 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:32,393 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 [] [2022-07-20 22:38:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:32,690 INFO L93 Difference]: Finished difference Result 988 states and 1534 transitions. [2022-07-20 22:38:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-20 22:38:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:32,692 INFO L225 Difference]: With dead ends: 988 [2022-07-20 22:38:32,693 INFO L226 Difference]: Without dead ends: 563 [2022-07-20 22:38:32,693 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 [2022-07-20 22:38:32,694 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 138 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:32,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 456 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-20 22:38:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 476. [2022-07-20 22:38:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5410526315789475) internal successors, (732), 475 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 732 transitions. [2022-07-20 22:38:32,705 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 732 transitions. Word has length 142 [2022-07-20 22:38:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:32,705 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 732 transitions. [2022-07-20 22:38:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 732 transitions. [2022-07-20 22:38:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 22:38:32,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:32,707 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:38:32,708 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1261572010, now seen corresponding path program 1 times [2022-07-20 22:38:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434357062] [2022-07-20 22:38:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:38:32,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434357062] [2022-07-20 22:38:32,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434357062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:32,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:32,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:32,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210439516] [2022-07-20 22:38:32,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:32,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:32,824 INFO L87 Difference]: Start difference. First operand 476 states and 732 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:33,532 INFO L93 Difference]: Finished difference Result 1008 states and 1554 transitions. [2022-07-20 22:38:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-07-20 22:38:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:33,535 INFO L225 Difference]: With dead ends: 1008 [2022-07-20 22:38:33,535 INFO L226 Difference]: Without dead ends: 553 [2022-07-20 22:38:33,536 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 [2022-07-20 22:38:33,536 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 137 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:33,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 424 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:38:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-20 22:38:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 476. [2022-07-20 22:38:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.528421052631579) internal successors, (726), 475 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 726 transitions. [2022-07-20 22:38:33,548 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 726 transitions. Word has length 143 [2022-07-20 22:38:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:33,548 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 726 transitions. [2022-07-20 22:38:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 726 transitions. [2022-07-20 22:38:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 22:38:33,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:33,550 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:38:33,550 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1455297220, now seen corresponding path program 1 times [2022-07-20 22:38:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:33,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503613451] [2022-07-20 22:38:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:33,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:38:33,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:33,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503613451] [2022-07-20 22:38:33,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503613451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:33,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:33,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545053836] [2022-07-20 22:38:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:33,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:33,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:33,654 INFO L87 Difference]: Start difference. First operand 476 states and 726 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:34,519 INFO L93 Difference]: Finished difference Result 963 states and 1474 transitions. [2022-07-20 22:38:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-20 22:38:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:34,521 INFO L225 Difference]: With dead ends: 963 [2022-07-20 22:38:34,521 INFO L226 Difference]: Without dead ends: 508 [2022-07-20 22:38:34,522 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 [2022-07-20 22:38:34,522 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 73 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:34,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 575 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:38:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-07-20 22:38:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 476. [2022-07-20 22:38:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5263157894736843) internal successors, (725), 475 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 725 transitions. [2022-07-20 22:38:34,532 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 725 transitions. Word has length 144 [2022-07-20 22:38:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:34,533 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 725 transitions. [2022-07-20 22:38:34,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 725 transitions. [2022-07-20 22:38:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 22:38:34,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:34,553 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:34,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:38:34,553 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1532527678, now seen corresponding path program 1 times [2022-07-20 22:38:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460531723] [2022-07-20 22:38:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 22:38:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460531723] [2022-07-20 22:38:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460531723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:34,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:34,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129189409] [2022-07-20 22:38:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:34,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:34,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:34,655 INFO L87 Difference]: Start difference. First operand 476 states and 725 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:34,744 INFO L93 Difference]: Finished difference Result 1383 states and 2123 transitions. [2022-07-20 22:38:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-20 22:38:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:34,748 INFO L225 Difference]: With dead ends: 1383 [2022-07-20 22:38:34,749 INFO L226 Difference]: Without dead ends: 928 [2022-07-20 22:38:34,749 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 [2022-07-20 22:38:34,750 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 154 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:34,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 446 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-07-20 22:38:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-07-20 22:38:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.5113268608414239) internal successors, (1401), 927 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1401 transitions. [2022-07-20 22:38:34,768 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1401 transitions. Word has length 144 [2022-07-20 22:38:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:34,768 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1401 transitions. [2022-07-20 22:38:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1401 transitions. [2022-07-20 22:38:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 22:38:34,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:34,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:38:34,772 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -500866368, now seen corresponding path program 1 times [2022-07-20 22:38:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332877225] [2022-07-20 22:38:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:34,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-20 22:38:34,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:34,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332877225] [2022-07-20 22:38:34,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332877225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:34,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:34,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:34,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715014961] [2022-07-20 22:38:34,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:34,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:34,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:34,892 INFO L87 Difference]: Start difference. First operand 928 states and 1401 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:34,948 INFO L93 Difference]: Finished difference Result 1862 states and 2814 transitions. [2022-07-20 22:38:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-20 22:38:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:34,952 INFO L225 Difference]: With dead ends: 1862 [2022-07-20 22:38:34,952 INFO L226 Difference]: Without dead ends: 955 [2022-07-20 22:38:34,953 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 [2022-07-20 22:38:34,954 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:34,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 434 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:38:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-07-20 22:38:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 955. [2022-07-20 22:38:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.5052410901467506) internal successors, (1436), 954 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1436 transitions. [2022-07-20 22:38:34,986 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1436 transitions. Word has length 144 [2022-07-20 22:38:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:34,986 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1436 transitions. [2022-07-20 22:38:34,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1436 transitions. [2022-07-20 22:38:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 22:38:34,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:34,990 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:34,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 22:38:34,990 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash 360967234, now seen corresponding path program 1 times [2022-07-20 22:38:34,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:34,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122519638] [2022-07-20 22:38:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-20 22:38:35,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122519638] [2022-07-20 22:38:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122519638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:35,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:35,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025348263] [2022-07-20 22:38:35,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:35,081 INFO L87 Difference]: Start difference. First operand 955 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2022-07-20 22:38:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:35,129 INFO L93 Difference]: Finished difference Result 1891 states and 2850 transitions. [2022-07-20 22:38:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 144 [2022-07-20 22:38:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:35,133 INFO L225 Difference]: With dead ends: 1891 [2022-07-20 22:38:35,133 INFO L226 Difference]: Without dead ends: 957 [2022-07-20 22:38:35,134 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 [2022-07-20 22:38:35,135 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:35,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:38:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-07-20 22:38:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2022-07-20 22:38:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.50418410041841) internal successors, (1438), 956 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1438 transitions. [2022-07-20 22:38:35,155 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1438 transitions. Word has length 144 [2022-07-20 22:38:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:35,156 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1438 transitions. [2022-07-20 22:38:35,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2022-07-20 22:38:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1438 transitions. [2022-07-20 22:38:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-20 22:38:35,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:35,159 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:38:35,159 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1469229848, now seen corresponding path program 1 times [2022-07-20 22:38:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868696268] [2022-07-20 22:38:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:38:35,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868696268] [2022-07-20 22:38:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868696268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:35,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:35,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:35,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540586745] [2022-07-20 22:38:35,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:35,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:35,280 INFO L87 Difference]: Start difference. First operand 957 states and 1438 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2022-07-20 22:38:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:35,366 INFO L93 Difference]: Finished difference Result 2343 states and 3547 transitions. [2022-07-20 22:38:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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 146 [2022-07-20 22:38:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:35,371 INFO L225 Difference]: With dead ends: 2343 [2022-07-20 22:38:35,371 INFO L226 Difference]: Without dead ends: 1409 [2022-07-20 22:38:35,372 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 [2022-07-20 22:38:35,373 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 159 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:35,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 594 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-07-20 22:38:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2022-07-20 22:38:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 1.5014204545454546) internal successors, (2114), 1408 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2114 transitions. [2022-07-20 22:38:35,402 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2114 transitions. Word has length 146 [2022-07-20 22:38:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:35,402 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 2114 transitions. [2022-07-20 22:38:35,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2022-07-20 22:38:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2114 transitions. [2022-07-20 22:38:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-20 22:38:35,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:35,406 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-20 22:38:35,406 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1434763751, now seen corresponding path program 1 times [2022-07-20 22:38:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:35,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099468954] [2022-07-20 22:38:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-20 22:38:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099468954] [2022-07-20 22:38:35,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099468954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:35,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:35,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:35,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306573483] [2022-07-20 22:38:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:35,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:35,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:35,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:35,533 INFO L87 Difference]: Start difference. First operand 1409 states and 2114 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:36,007 INFO L93 Difference]: Finished difference Result 2948 states and 4429 transitions. [2022-07-20 22:38:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 175 [2022-07-20 22:38:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:36,013 INFO L225 Difference]: With dead ends: 2948 [2022-07-20 22:38:36,013 INFO L226 Difference]: Without dead ends: 1562 [2022-07-20 22:38:36,015 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 [2022-07-20 22:38:36,015 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 42 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:36,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 665 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:38:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-07-20 22:38:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1493. [2022-07-20 22:38:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.5033512064343164) internal successors, (2243), 1492 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2243 transitions. [2022-07-20 22:38:36,045 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2243 transitions. Word has length 175 [2022-07-20 22:38:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:36,046 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2243 transitions. [2022-07-20 22:38:36,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2243 transitions. [2022-07-20 22:38:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-20 22:38:36,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:36,049 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-20 22:38:36,049 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -866603135, now seen corresponding path program 1 times [2022-07-20 22:38:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:36,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467155181] [2022-07-20 22:38:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-20 22:38:36,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467155181] [2022-07-20 22:38:36,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467155181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:36,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:36,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234253620] [2022-07-20 22:38:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:36,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:36,176 INFO L87 Difference]: Start difference. First operand 1493 states and 2243 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) [2022-07-20 22:38:38,182 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 [] [2022-07-20 22:38:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:38,555 INFO L93 Difference]: Finished difference Result 3186 states and 4762 transitions. [2022-07-20 22:38:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:38,560 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 189 [2022-07-20 22:38:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:38,566 INFO L225 Difference]: With dead ends: 3186 [2022-07-20 22:38:38,566 INFO L226 Difference]: Without dead ends: 1716 [2022-07-20 22:38:38,568 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 [2022-07-20 22:38:38,569 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 149 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:38,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 426 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:38:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-07-20 22:38:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1493. [2022-07-20 22:38:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.4892761394101877) internal successors, (2222), 1492 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2222 transitions. [2022-07-20 22:38:38,601 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2222 transitions. Word has length 189 [2022-07-20 22:38:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:38,602 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2222 transitions. [2022-07-20 22:38:38,602 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) [2022-07-20 22:38:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2222 transitions. [2022-07-20 22:38:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-20 22:38:38,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:38,605 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, 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] [2022-07-20 22:38:38,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 22:38:38,606 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1420236190, now seen corresponding path program 1 times [2022-07-20 22:38:38,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:38,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089143442] [2022-07-20 22:38:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:38,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 22:38:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:38,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089143442] [2022-07-20 22:38:38,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089143442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:38,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369803153] [2022-07-20 22:38:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:38,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:38:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:38:38,785 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) [2022-07-20 22:38:38,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:38:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:39,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:38:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:38:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-20 22:38:39,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:38:39,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369803153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:39,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:38:39,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 22:38:39,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420705721] [2022-07-20 22:38:39,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:39,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:38:39,651 INFO L87 Difference]: Start difference. First operand 1493 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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) [2022-07-20 22:38:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:39,746 INFO L93 Difference]: Finished difference Result 3444 states and 5152 transitions. [2022-07-20 22:38:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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 197 [2022-07-20 22:38:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:39,752 INFO L225 Difference]: With dead ends: 3444 [2022-07-20 22:38:39,752 INFO L226 Difference]: Without dead ends: 1974 [2022-07-20 22:38:39,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:38:39,754 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:39,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 387 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-07-20 22:38:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1974. [2022-07-20 22:38:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 1.490116573745565) internal successors, (2940), 1973 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2940 transitions. [2022-07-20 22:38:39,796 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2940 transitions. Word has length 197 [2022-07-20 22:38:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:39,797 INFO L495 AbstractCegarLoop]: Abstraction has 1974 states and 2940 transitions. [2022-07-20 22:38:39,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 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) [2022-07-20 22:38:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2940 transitions. [2022-07-20 22:38:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-20 22:38:39,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:39,802 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, 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] [2022-07-20 22:38:39,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:38:40,011 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,SelfDestructingSolverStorable34 [2022-07-20 22:38:40,012 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2107016587, now seen corresponding path program 1 times [2022-07-20 22:38:40,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117353996] [2022-07-20 22:38:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:40,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-20 22:38:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:40,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117353996] [2022-07-20 22:38:40,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117353996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:40,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:40,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:40,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110461216] [2022-07-20 22:38:40,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:40,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:40,208 INFO L87 Difference]: Start difference. First operand 1974 states and 2940 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:40,307 INFO L93 Difference]: Finished difference Result 4406 states and 6588 transitions. [2022-07-20 22:38:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-20 22:38:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:40,316 INFO L225 Difference]: With dead ends: 4406 [2022-07-20 22:38:40,316 INFO L226 Difference]: Without dead ends: 2455 [2022-07-20 22:38:40,318 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 [2022-07-20 22:38:40,320 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 163 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:40,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 386 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-07-20 22:38:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2455. [2022-07-20 22:38:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2454 states have (on average 1.4910350448247758) internal successors, (3659), 2454 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3659 transitions. [2022-07-20 22:38:40,373 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3659 transitions. Word has length 199 [2022-07-20 22:38:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:40,373 INFO L495 AbstractCegarLoop]: Abstraction has 2455 states and 3659 transitions. [2022-07-20 22:38:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3659 transitions. [2022-07-20 22:38:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-20 22:38:40,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:40,378 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:40,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:38:40,379 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash 447893990, now seen corresponding path program 1 times [2022-07-20 22:38:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050128135] [2022-07-20 22:38:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-20 22:38:40,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050128135] [2022-07-20 22:38:40,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050128135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:40,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:40,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:40,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826496575] [2022-07-20 22:38:40,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:40,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:40,536 INFO L87 Difference]: Start difference. First operand 2455 states and 3659 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:40,639 INFO L93 Difference]: Finished difference Result 5368 states and 8026 transitions. [2022-07-20 22:38:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 [2022-07-20 22:38:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:40,663 INFO L225 Difference]: With dead ends: 5368 [2022-07-20 22:38:40,663 INFO L226 Difference]: Without dead ends: 2936 [2022-07-20 22:38:40,666 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 [2022-07-20 22:38:40,667 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 170 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:40,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 385 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-07-20 22:38:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2936. [2022-07-20 22:38:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 1.4919931856899489) internal successors, (4379), 2935 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 4379 transitions. [2022-07-20 22:38:40,728 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 4379 transitions. Word has length 238 [2022-07-20 22:38:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:40,728 INFO L495 AbstractCegarLoop]: Abstraction has 2936 states and 4379 transitions. [2022-07-20 22:38:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 4379 transitions. [2022-07-20 22:38:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-20 22:38:40,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:40,734 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:38:40,734 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash 230867452, now seen corresponding path program 1 times [2022-07-20 22:38:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511786154] [2022-07-20 22:38:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-20 22:38:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511786154] [2022-07-20 22:38:40,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511786154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:40,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:40,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415426183] [2022-07-20 22:38:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:40,881 INFO L87 Difference]: Start difference. First operand 2936 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:40,989 INFO L93 Difference]: Finished difference Result 6330 states and 9466 transitions. [2022-07-20 22:38:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 240 [2022-07-20 22:38:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:40,996 INFO L225 Difference]: With dead ends: 6330 [2022-07-20 22:38:40,997 INFO L226 Difference]: Without dead ends: 3417 [2022-07-20 22:38:41,000 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 [2022-07-20 22:38:41,000 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 171 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:41,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 384 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2022-07-20 22:38:41,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3417. [2022-07-20 22:38:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 1.4929742388758782) internal successors, (5100), 3416 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 5100 transitions. [2022-07-20 22:38:41,093 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 5100 transitions. Word has length 240 [2022-07-20 22:38:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:41,093 INFO L495 AbstractCegarLoop]: Abstraction has 3417 states and 5100 transitions. [2022-07-20 22:38:41,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 5100 transitions. [2022-07-20 22:38:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-20 22:38:41,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:41,100 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:38:41,100 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1840467843, now seen corresponding path program 1 times [2022-07-20 22:38:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289764457] [2022-07-20 22:38:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-07-20 22:38:41,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:41,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289764457] [2022-07-20 22:38:41,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289764457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:41,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:41,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:41,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459260468] [2022-07-20 22:38:41,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:41,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:41,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:41,270 INFO L87 Difference]: Start difference. First operand 3417 states and 5100 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2022-07-20 22:38:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:41,404 INFO L93 Difference]: Finished difference Result 7284 states and 10895 transitions. [2022-07-20 22:38:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 272 [2022-07-20 22:38:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:41,411 INFO L225 Difference]: With dead ends: 7284 [2022-07-20 22:38:41,412 INFO L226 Difference]: Without dead ends: 3890 [2022-07-20 22:38:41,415 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 [2022-07-20 22:38:41,416 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:41,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 593 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-07-20 22:38:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3890. [2022-07-20 22:38:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 1.4924145024427873) internal successors, (5804), 3889 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 5804 transitions. [2022-07-20 22:38:41,491 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 5804 transitions. Word has length 272 [2022-07-20 22:38:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:41,492 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 5804 transitions. [2022-07-20 22:38:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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) [2022-07-20 22:38:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 5804 transitions. [2022-07-20 22:38:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-20 22:38:41,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:41,499 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:41,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-20 22:38:41,499 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash 943074565, now seen corresponding path program 1 times [2022-07-20 22:38:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474302249] [2022-07-20 22:38:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-20 22:38:41,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474302249] [2022-07-20 22:38:41,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474302249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:41,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:41,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292593164] [2022-07-20 22:38:41,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:41,678 INFO L87 Difference]: Start difference. First operand 3890 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:41,804 INFO L93 Difference]: Finished difference Result 8205 states and 12267 transitions. [2022-07-20 22:38:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 [2022-07-20 22:38:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:41,811 INFO L225 Difference]: With dead ends: 8205 [2022-07-20 22:38:41,812 INFO L226 Difference]: Without dead ends: 4338 [2022-07-20 22:38:41,815 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 [2022-07-20 22:38:41,815 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 161 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:41,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 596 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2022-07-20 22:38:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 4338. [2022-07-20 22:38:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 1.4913534701406501) internal successors, (6468), 4337 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 6468 transitions. [2022-07-20 22:38:41,927 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 6468 transitions. Word has length 272 [2022-07-20 22:38:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:41,927 INFO L495 AbstractCegarLoop]: Abstraction has 4338 states and 6468 transitions. [2022-07-20 22:38:41,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 6468 transitions. [2022-07-20 22:38:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-07-20 22:38:41,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:41,936 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:41,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 22:38:41,936 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 727620858, now seen corresponding path program 1 times [2022-07-20 22:38:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246754027] [2022-07-20 22:38:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:41,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-07-20 22:38:42,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246754027] [2022-07-20 22:38:42,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246754027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:42,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:42,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082329650] [2022-07-20 22:38:42,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:42,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:42,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:42,140 INFO L87 Difference]: Start difference. First operand 4338 states and 6468 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:42,304 INFO L93 Difference]: Finished difference Result 9134 states and 13644 transitions. [2022-07-20 22:38:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 347 [2022-07-20 22:38:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:42,314 INFO L225 Difference]: With dead ends: 9134 [2022-07-20 22:38:42,314 INFO L226 Difference]: Without dead ends: 4819 [2022-07-20 22:38:42,319 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 [2022-07-20 22:38:42,323 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:42,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 381 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2022-07-20 22:38:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 4819. [2022-07-20 22:38:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 1.4927355749273556) internal successors, (7192), 4818 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 7192 transitions. [2022-07-20 22:38:42,426 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 7192 transitions. Word has length 347 [2022-07-20 22:38:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:42,427 INFO L495 AbstractCegarLoop]: Abstraction has 4819 states and 7192 transitions. [2022-07-20 22:38:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 7192 transitions. [2022-07-20 22:38:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-07-20 22:38:42,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:42,436 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:42,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 22:38:42,437 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:42,437 INFO L85 PathProgramCache]: Analyzing trace with hash 54456075, now seen corresponding path program 1 times [2022-07-20 22:38:42,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:42,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297168339] [2022-07-20 22:38:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:42,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2022-07-20 22:38:42,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:42,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297168339] [2022-07-20 22:38:42,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297168339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:42,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:42,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216538131] [2022-07-20 22:38:42,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:42,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:42,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:42,689 INFO L87 Difference]: Start difference. First operand 4819 states and 7192 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:42,834 INFO L93 Difference]: Finished difference Result 10096 states and 15092 transitions. [2022-07-20 22:38:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2022-07-20 22:38:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:42,845 INFO L225 Difference]: With dead ends: 10096 [2022-07-20 22:38:42,846 INFO L226 Difference]: Without dead ends: 5300 [2022-07-20 22:38:42,851 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 [2022-07-20 22:38:42,852 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:42,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 380 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2022-07-20 22:38:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 5300. [2022-07-20 22:38:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5299 states have (on average 1.4940554821664465) internal successors, (7917), 5299 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 7917 transitions. [2022-07-20 22:38:42,996 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 7917 transitions. Word has length 388 [2022-07-20 22:38:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:42,996 INFO L495 AbstractCegarLoop]: Abstraction has 5300 states and 7917 transitions. [2022-07-20 22:38:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 7917 transitions. [2022-07-20 22:38:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-07-20 22:38:43,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:43,006 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-20 22:38:43,006 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1652971603, now seen corresponding path program 1 times [2022-07-20 22:38:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:43,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226863492] [2022-07-20 22:38:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2022-07-20 22:38:43,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:43,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226863492] [2022-07-20 22:38:43,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226863492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:43,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:43,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209731227] [2022-07-20 22:38:43,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:43,293 INFO L87 Difference]: Start difference. First operand 5300 states and 7917 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:43,458 INFO L93 Difference]: Finished difference Result 11051 states and 16531 transitions. [2022-07-20 22:38:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 395 [2022-07-20 22:38:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:43,471 INFO L225 Difference]: With dead ends: 11051 [2022-07-20 22:38:43,471 INFO L226 Difference]: Without dead ends: 5774 [2022-07-20 22:38:43,478 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 [2022-07-20 22:38:43,479 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:43,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2022-07-20 22:38:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 5774. [2022-07-20 22:38:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5774 states, 5773 states have (on average 1.4935042438939892) internal successors, (8622), 5773 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 8622 transitions. [2022-07-20 22:38:43,621 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 8622 transitions. Word has length 395 [2022-07-20 22:38:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:43,622 INFO L495 AbstractCegarLoop]: Abstraction has 5774 states and 8622 transitions. [2022-07-20 22:38:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 8622 transitions. [2022-07-20 22:38:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-07-20 22:38:43,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:43,634 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-20 22:38:43,634 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1960737092, now seen corresponding path program 1 times [2022-07-20 22:38:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665046081] [2022-07-20 22:38:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-07-20 22:38:43,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665046081] [2022-07-20 22:38:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665046081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:43,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:43,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294166833] [2022-07-20 22:38:43,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:43,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:43,883 INFO L87 Difference]: Start difference. First operand 5774 states and 8622 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:44,077 INFO L93 Difference]: Finished difference Result 12006 states and 17952 transitions. [2022-07-20 22:38:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 471 [2022-07-20 22:38:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:44,088 INFO L225 Difference]: With dead ends: 12006 [2022-07-20 22:38:44,088 INFO L226 Difference]: Without dead ends: 6255 [2022-07-20 22:38:44,094 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 [2022-07-20 22:38:44,094 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:44,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 378 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2022-07-20 22:38:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 6255. [2022-07-20 22:38:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6255 states, 6254 states have (on average 1.4948832747041894) internal successors, (9349), 6254 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6255 states to 6255 states and 9349 transitions. [2022-07-20 22:38:44,213 INFO L78 Accepts]: Start accepts. Automaton has 6255 states and 9349 transitions. Word has length 471 [2022-07-20 22:38:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:44,214 INFO L495 AbstractCegarLoop]: Abstraction has 6255 states and 9349 transitions. [2022-07-20 22:38:44,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6255 states and 9349 transitions. [2022-07-20 22:38:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-20 22:38:44,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:44,226 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:44,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 22:38:44,226 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1847595616, now seen corresponding path program 1 times [2022-07-20 22:38:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:44,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984487375] [2022-07-20 22:38:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 744 proven. 7 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2022-07-20 22:38:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984487375] [2022-07-20 22:38:44,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984487375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:44,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862248998] [2022-07-20 22:38:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:44,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:38:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:38:44,490 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) [2022-07-20 22:38:44,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:38:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:38:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:38:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-07-20 22:38:45,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:38:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862248998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:45,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:38:45,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 22:38:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126004478] [2022-07-20 22:38:45,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:45,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:38:45,693 INFO L87 Difference]: Start difference. First operand 6255 states and 9349 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:45,843 INFO L93 Difference]: Finished difference Result 12968 states and 19406 transitions. [2022-07-20 22:38:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:45,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 513 [2022-07-20 22:38:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:45,858 INFO L225 Difference]: With dead ends: 12968 [2022-07-20 22:38:45,858 INFO L226 Difference]: Without dead ends: 6736 [2022-07-20 22:38:45,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:38:45,866 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:45,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 377 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2022-07-20 22:38:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 6736. [2022-07-20 22:38:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6736 states, 6735 states have (on average 1.4962138084632517) internal successors, (10077), 6735 states have internal predecessors, (10077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 10077 transitions. [2022-07-20 22:38:46,000 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 10077 transitions. Word has length 513 [2022-07-20 22:38:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:46,000 INFO L495 AbstractCegarLoop]: Abstraction has 6736 states and 10077 transitions. [2022-07-20 22:38:46,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 10077 transitions. [2022-07-20 22:38:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-07-20 22:38:46,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:46,015 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:46,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:38:46,239 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 [2022-07-20 22:38:46,239 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -138901474, now seen corresponding path program 1 times [2022-07-20 22:38:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825969373] [2022-07-20 22:38:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2022-07-20 22:38:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:46,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825969373] [2022-07-20 22:38:46,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825969373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:46,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:46,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:38:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149351366] [2022-07-20 22:38:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:46,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:38:46,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:38:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:38:46,528 INFO L87 Difference]: Start difference. First operand 6736 states and 10077 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:47,209 INFO L93 Difference]: Finished difference Result 14638 states and 21839 transitions. [2022-07-20 22:38:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:38:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 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 521 [2022-07-20 22:38:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:47,224 INFO L225 Difference]: With dead ends: 14638 [2022-07-20 22:38:47,225 INFO L226 Difference]: Without dead ends: 7925 [2022-07-20 22:38:47,233 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 [2022-07-20 22:38:47,234 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 75 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:47,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 725 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:38:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7925 states. [2022-07-20 22:38:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7925 to 7310. [2022-07-20 22:38:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 7309 states have (on average 1.49746887399097) internal successors, (10945), 7309 states have internal predecessors, (10945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 10945 transitions. [2022-07-20 22:38:47,481 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 10945 transitions. Word has length 521 [2022-07-20 22:38:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:47,482 INFO L495 AbstractCegarLoop]: Abstraction has 7310 states and 10945 transitions. [2022-07-20 22:38:47,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 10945 transitions. [2022-07-20 22:38:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-07-20 22:38:47,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:47,494 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-20 22:38:47,495 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -930711262, now seen corresponding path program 1 times [2022-07-20 22:38:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301117086] [2022-07-20 22:38:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2022-07-20 22:38:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301117086] [2022-07-20 22:38:47,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301117086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:47,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:47,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:47,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485110914] [2022-07-20 22:38:47,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:47,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:47,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:47,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:47,785 INFO L87 Difference]: Start difference. First operand 7310 states and 10945 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:47,964 INFO L93 Difference]: Finished difference Result 15113 states and 22651 transitions. [2022-07-20 22:38:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 521 [2022-07-20 22:38:47,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:47,980 INFO L225 Difference]: With dead ends: 15113 [2022-07-20 22:38:47,981 INFO L226 Difference]: Without dead ends: 7826 [2022-07-20 22:38:47,989 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 [2022-07-20 22:38:47,990 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:47,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2022-07-20 22:38:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 7826. [2022-07-20 22:38:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7826 states, 7825 states have (on average 1.4968690095846646) internal successors, (11713), 7825 states have internal predecessors, (11713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7826 states to 7826 states and 11713 transitions. [2022-07-20 22:38:48,186 INFO L78 Accepts]: Start accepts. Automaton has 7826 states and 11713 transitions. Word has length 521 [2022-07-20 22:38:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:48,187 INFO L495 AbstractCegarLoop]: Abstraction has 7826 states and 11713 transitions. [2022-07-20 22:38:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 7826 states and 11713 transitions. [2022-07-20 22:38:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-07-20 22:38:48,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:48,201 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-20 22:38:48,202 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash -296644096, now seen corresponding path program 1 times [2022-07-20 22:38:48,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:48,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164492996] [2022-07-20 22:38:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 849 proven. 0 refuted. 0 times theorem prover too weak. 2561 trivial. 0 not checked. [2022-07-20 22:38:48,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:48,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164492996] [2022-07-20 22:38:48,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164492996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:48,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:48,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:48,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140174334] [2022-07-20 22:38:48,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:48,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:48,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:48,551 INFO L87 Difference]: Start difference. First operand 7826 states and 11713 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:48,792 INFO L93 Difference]: Finished difference Result 16151 states and 24196 transitions. [2022-07-20 22:38:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 598 [2022-07-20 22:38:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:48,801 INFO L225 Difference]: With dead ends: 16151 [2022-07-20 22:38:48,801 INFO L226 Difference]: Without dead ends: 8348 [2022-07-20 22:38:48,808 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 [2022-07-20 22:38:48,808 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:48,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 375 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8348 states. [2022-07-20 22:38:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8348 to 8348. [2022-07-20 22:38:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 1.498143045405535) internal successors, (12505), 8347 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 12505 transitions. [2022-07-20 22:38:48,965 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 12505 transitions. Word has length 598 [2022-07-20 22:38:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:48,966 INFO L495 AbstractCegarLoop]: Abstraction has 8348 states and 12505 transitions. [2022-07-20 22:38:48,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 12505 transitions. [2022-07-20 22:38:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-07-20 22:38:48,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:48,979 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-20 22:38:48,980 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -764735426, now seen corresponding path program 1 times [2022-07-20 22:38:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016643897] [2022-07-20 22:38:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2022-07-20 22:38:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:49,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016643897] [2022-07-20 22:38:49,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016643897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:49,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:49,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040381714] [2022-07-20 22:38:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:49,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:49,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:49,289 INFO L87 Difference]: Start difference. First operand 8348 states and 12505 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:49,486 INFO L93 Difference]: Finished difference Result 17195 states and 25780 transitions. [2022-07-20 22:38:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 641 [2022-07-20 22:38:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:49,499 INFO L225 Difference]: With dead ends: 17195 [2022-07-20 22:38:49,500 INFO L226 Difference]: Without dead ends: 8870 [2022-07-20 22:38:49,508 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 [2022-07-20 22:38:49,509 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:49,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8870 states. [2022-07-20 22:38:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8870 to 8870. [2022-07-20 22:38:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8870 states, 8869 states have (on average 1.4993798624422146) internal successors, (13298), 8869 states have internal predecessors, (13298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 13298 transitions. [2022-07-20 22:38:49,684 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 13298 transitions. Word has length 641 [2022-07-20 22:38:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:49,684 INFO L495 AbstractCegarLoop]: Abstraction has 8870 states and 13298 transitions. [2022-07-20 22:38:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 13298 transitions. [2022-07-20 22:38:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-07-20 22:38:49,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:49,696 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:49,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-20 22:38:49,696 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1181033531, now seen corresponding path program 1 times [2022-07-20 22:38:49,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:49,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599111342] [2022-07-20 22:38:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:49,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 502 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2022-07-20 22:38:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599111342] [2022-07-20 22:38:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599111342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:50,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:50,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:50,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487413095] [2022-07-20 22:38:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:50,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:50,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:50,020 INFO L87 Difference]: Start difference. First operand 8870 states and 13298 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:50,175 INFO L93 Difference]: Finished difference Result 18234 states and 27359 transitions. [2022-07-20 22:38:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:50,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 650 [2022-07-20 22:38:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:50,184 INFO L225 Difference]: With dead ends: 18234 [2022-07-20 22:38:50,185 INFO L226 Difference]: Without dead ends: 9387 [2022-07-20 22:38:50,193 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 [2022-07-20 22:38:50,193 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:50,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9387 states. [2022-07-20 22:38:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9387 to 9387. [2022-07-20 22:38:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9386 states have (on average 1.4987215001065417) internal successors, (14067), 9386 states have internal predecessors, (14067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 14067 transitions. [2022-07-20 22:38:50,356 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 14067 transitions. Word has length 650 [2022-07-20 22:38:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:50,356 INFO L495 AbstractCegarLoop]: Abstraction has 9387 states and 14067 transitions. [2022-07-20 22:38:50,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 14067 transitions. [2022-07-20 22:38:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2022-07-20 22:38:50,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:50,369 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:50,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-20 22:38:50,369 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1426739437, now seen corresponding path program 1 times [2022-07-20 22:38:50,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:50,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612757205] [2022-07-20 22:38:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:50,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 1058 proven. 0 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2022-07-20 22:38:50,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:50,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612757205] [2022-07-20 22:38:50,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612757205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:50,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:50,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:50,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800659464] [2022-07-20 22:38:50,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:50,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:50,713 INFO L87 Difference]: Start difference. First operand 9387 states and 14067 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:50,949 INFO L93 Difference]: Finished difference Result 19273 states and 28904 transitions. [2022-07-20 22:38:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:50,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 728 [2022-07-20 22:38:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:50,959 INFO L225 Difference]: With dead ends: 19273 [2022-07-20 22:38:50,959 INFO L226 Difference]: Without dead ends: 9909 [2022-07-20 22:38:50,964 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 [2022-07-20 22:38:50,965 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:50,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 372 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9909 states. [2022-07-20 22:38:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9909 to 9909. [2022-07-20 22:38:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 1.5) internal successors, (14862), 9908 states have internal predecessors, (14862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 14862 transitions. [2022-07-20 22:38:51,137 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 14862 transitions. Word has length 728 [2022-07-20 22:38:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:51,138 INFO L495 AbstractCegarLoop]: Abstraction has 9909 states and 14862 transitions. [2022-07-20 22:38:51,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 14862 transitions. [2022-07-20 22:38:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2022-07-20 22:38:51,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:51,154 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 12, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-20 22:38:51,154 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1609533332, now seen corresponding path program 1 times [2022-07-20 22:38:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:51,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840664588] [2022-07-20 22:38:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5655 backedges. 1122 proven. 0 refuted. 0 times theorem prover too weak. 4533 trivial. 0 not checked. [2022-07-20 22:38:51,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840664588] [2022-07-20 22:38:51,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840664588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:38:51,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:38:51,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:38:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667292087] [2022-07-20 22:38:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:51,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:38:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:38:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:38:51,534 INFO L87 Difference]: Start difference. First operand 9909 states and 14862 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:38:51,700 INFO L93 Difference]: Finished difference Result 10433 states and 15660 transitions. [2022-07-20 22:38:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:38:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 772 [2022-07-20 22:38:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:38:51,713 INFO L225 Difference]: With dead ends: 10433 [2022-07-20 22:38:51,713 INFO L226 Difference]: Without dead ends: 10431 [2022-07-20 22:38:51,717 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 [2022-07-20 22:38:51,718 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:38:51,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 371 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:38:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2022-07-20 22:38:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 10431. [2022-07-20 22:38:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10431 states, 10430 states have (on average 1.5012464046021092) internal successors, (15658), 10430 states have internal predecessors, (15658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10431 states to 10431 states and 15658 transitions. [2022-07-20 22:38:52,018 INFO L78 Accepts]: Start accepts. Automaton has 10431 states and 15658 transitions. Word has length 772 [2022-07-20 22:38:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:38:52,019 INFO L495 AbstractCegarLoop]: Abstraction has 10431 states and 15658 transitions. [2022-07-20 22:38:52,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:38:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10431 states and 15658 transitions. [2022-07-20 22:38:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-07-20 22:38:52,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:38:52,033 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:38:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-20 22:38:52,033 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:38:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:38:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -903556745, now seen corresponding path program 1 times [2022-07-20 22:38:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:38:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038524656] [2022-07-20 22:38:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:38:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3657 proven. 480 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2022-07-20 22:38:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:38:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038524656] [2022-07-20 22:38:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038524656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707857972] [2022-07-20 22:38:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:38:53,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:38:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:38:53,300 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) [2022-07-20 22:38:53,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:38:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:38:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 3304 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 22:38:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:38:54,917 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:38:54,918 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 [2022-07-20 22:38:55,024 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-20 22:38:55,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-07-20 22:38:55,082 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 [2022-07-20 22:38:55,122 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:38:55,122 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 [2022-07-20 22:38:55,192 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:38:55,193 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 [2022-07-20 22:38:55,214 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 [2022-07-20 22:38:55,245 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 31 treesize of output 19 [2022-07-20 22:38:55,249 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 13 [2022-07-20 22:38:55,287 INFO L356 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2022-07-20 22:38:55,288 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 33 treesize of output 55 [2022-07-20 22:38:55,362 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-20 22:38:55,362 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 34 treesize of output 36 [2022-07-20 22:38:55,575 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:38:55,575 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 29 treesize of output 11 [2022-07-20 22:38:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2342 proven. 586 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2022-07-20 22:38:55,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:38:55,818 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 77 treesize of output 53 [2022-07-20 22:38:55,822 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 53 treesize of output 41 [2022-07-20 22:38:59,686 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 100 treesize of output 88 [2022-07-20 22:38:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2152 proven. 0 refuted. 0 times theorem prover too weak. 3550 trivial. 0 not checked. [2022-07-20 22:38:59,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707857972] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:38:59,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:38:59,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 13] total 25 [2022-07-20 22:38:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710075320] [2022-07-20 22:38:59,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:38:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:38:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:38:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:38:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2022-07-20 22:38:59,707 INFO L87 Difference]: Start difference. First operand 10431 states and 15658 transitions. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:00,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:10,146 INFO L93 Difference]: Finished difference Result 30466 states and 45757 transitions. [2022-07-20 22:39:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:39:10,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 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 782 [2022-07-20 22:39:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:10,171 INFO L225 Difference]: With dead ends: 30466 [2022-07-20 22:39:10,171 INFO L226 Difference]: Without dead ends: 20058 [2022-07-20 22:39:10,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1556 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=109, Invalid=700, Unknown=3, NotChecked=0, Total=812 [2022-07-20 22:39:10,186 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 447 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:10,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1035 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 528 Invalid, 0 Unknown, 263 Unchecked, 2.6s Time] [2022-07-20 22:39:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20058 states. [2022-07-20 22:39:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20058 to 17355. [2022-07-20 22:39:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17355 states, 17354 states have (on average 1.5145211478621643) internal successors, (26283), 17354 states have internal predecessors, (26283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17355 states to 17355 states and 26283 transitions. [2022-07-20 22:39:10,652 INFO L78 Accepts]: Start accepts. Automaton has 17355 states and 26283 transitions. Word has length 782 [2022-07-20 22:39:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:10,652 INFO L495 AbstractCegarLoop]: Abstraction has 17355 states and 26283 transitions. [2022-07-20 22:39:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17355 states and 26283 transitions. [2022-07-20 22:39:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-07-20 22:39:10,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:10,670 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:10,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:39:10,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:39:10,876 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1153034768, now seen corresponding path program 1 times [2022-07-20 22:39:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:10,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496407015] [2022-07-20 22:39:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:10,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 3231 proven. 0 refuted. 0 times theorem prover too weak. 2486 trivial. 0 not checked. [2022-07-20 22:39:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496407015] [2022-07-20 22:39:11,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496407015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:11,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:11,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:11,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745092698] [2022-07-20 22:39:11,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:11,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:11,224 INFO L87 Difference]: Start difference. First operand 17355 states and 26283 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:12,645 INFO L93 Difference]: Finished difference Result 36123 states and 54530 transitions. [2022-07-20 22:39:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 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 785 [2022-07-20 22:39:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:12,668 INFO L225 Difference]: With dead ends: 36123 [2022-07-20 22:39:12,668 INFO L226 Difference]: Without dead ends: 18791 [2022-07-20 22:39:12,682 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 [2022-07-20 22:39:12,683 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 73 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:12,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 723 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 22:39:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18791 states. [2022-07-20 22:39:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18791 to 17375. [2022-07-20 22:39:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17375 states, 17374 states have (on average 1.513928859214919) internal successors, (26303), 17374 states have internal predecessors, (26303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17375 states to 17375 states and 26303 transitions. [2022-07-20 22:39:12,988 INFO L78 Accepts]: Start accepts. Automaton has 17375 states and 26303 transitions. Word has length 785 [2022-07-20 22:39:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:12,989 INFO L495 AbstractCegarLoop]: Abstraction has 17375 states and 26303 transitions. [2022-07-20 22:39:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 17375 states and 26303 transitions. [2022-07-20 22:39:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-07-20 22:39:13,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:13,008 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-20 22:39:13,008 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash 855496686, now seen corresponding path program 1 times [2022-07-20 22:39:13,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:13,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500103927] [2022-07-20 22:39:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 3731 proven. 187 refuted. 0 times theorem prover too weak. 2918 trivial. 0 not checked. [2022-07-20 22:39:13,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500103927] [2022-07-20 22:39:13,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500103927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:39:13,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247921720] [2022-07-20 22:39:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:13,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:39:13,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:39:13,388 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) [2022-07-20 22:39:13,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:39:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:14,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 3547 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 22:39:14,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:39:14,982 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:39:14,983 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 [2022-07-20 22:39:15,015 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:39:15,015 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 [2022-07-20 22:39:15,042 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 [2022-07-20 22:39:15,065 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:39:15,066 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 22:39:15,091 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 [2022-07-20 22:39:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 2143 proven. 304 refuted. 0 times theorem prover too weak. 4389 trivial. 0 not checked. [2022-07-20 22:39:15,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:39:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 2148 proven. 0 refuted. 0 times theorem prover too weak. 4688 trivial. 0 not checked. [2022-07-20 22:39:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247921720] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:39:15,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:39:15,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-20 22:39:15,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231435459] [2022-07-20 22:39:15,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:15,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:15,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:39:15,150 INFO L87 Difference]: Start difference. First operand 17375 states and 26303 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:17,170 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 [] [2022-07-20 22:39:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:17,783 INFO L93 Difference]: Finished difference Result 37176 states and 56015 transitions. [2022-07-20 22:39:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 848 [2022-07-20 22:39:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:17,810 INFO L225 Difference]: With dead ends: 37176 [2022-07-20 22:39:17,810 INFO L226 Difference]: Without dead ends: 19824 [2022-07-20 22:39:17,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1695 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:39:17,825 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 144 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:17,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 473 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19824 states. [2022-07-20 22:39:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19824 to 17375. [2022-07-20 22:39:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17375 states, 17374 states have (on average 1.4947047312075514) internal successors, (25969), 17374 states have internal predecessors, (25969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17375 states to 17375 states and 25969 transitions. [2022-07-20 22:39:18,157 INFO L78 Accepts]: Start accepts. Automaton has 17375 states and 25969 transitions. Word has length 848 [2022-07-20 22:39:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:18,157 INFO L495 AbstractCegarLoop]: Abstraction has 17375 states and 25969 transitions. [2022-07-20 22:39:18,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17375 states and 25969 transitions. [2022-07-20 22:39:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-07-20 22:39:18,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:18,178 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:18,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:39:18,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:39:18,379 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1255240550, now seen corresponding path program 1 times [2022-07-20 22:39:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430574870] [2022-07-20 22:39:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3949 proven. 46 refuted. 0 times theorem prover too weak. 2949 trivial. 0 not checked. [2022-07-20 22:39:18,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430574870] [2022-07-20 22:39:18,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430574870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:39:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404669519] [2022-07-20 22:39:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:39:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:39:18,748 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) [2022-07-20 22:39:18,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:39:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3571 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:39:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:39:20,244 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:39:20,244 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 [2022-07-20 22:39:20,281 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:39:20,281 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 [2022-07-20 22:39:20,314 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 [2022-07-20 22:39:20,331 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:39:20,331 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 [2022-07-20 22:39:20,393 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 [2022-07-20 22:39:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3944 proven. 238 refuted. 0 times theorem prover too weak. 2762 trivial. 0 not checked. [2022-07-20 22:39:20,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:39:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 3917 proven. 0 refuted. 0 times theorem prover too weak. 3027 trivial. 0 not checked. [2022-07-20 22:39:20,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404669519] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:39:20,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:39:20,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-20 22:39:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181437234] [2022-07-20 22:39:20,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:20,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:20,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:20,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:39:20,481 INFO L87 Difference]: Start difference. First operand 17375 states and 25969 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:22,488 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 [] [2022-07-20 22:39:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:23,201 INFO L93 Difference]: Finished difference Result 37176 states and 55347 transitions. [2022-07-20 22:39:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 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 848 [2022-07-20 22:39:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:23,227 INFO L225 Difference]: With dead ends: 37176 [2022-07-20 22:39:23,227 INFO L226 Difference]: Without dead ends: 19824 [2022-07-20 22:39:23,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1694 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:39:23,241 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 125 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:23,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 583 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:39:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19824 states. [2022-07-20 22:39:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19824 to 17395. [2022-07-20 22:39:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17395 states, 17394 states have (on average 1.4941359089341153) internal successors, (25989), 17394 states have internal predecessors, (25989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17395 states to 17395 states and 25989 transitions. [2022-07-20 22:39:23,591 INFO L78 Accepts]: Start accepts. Automaton has 17395 states and 25989 transitions. Word has length 848 [2022-07-20 22:39:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:23,592 INFO L495 AbstractCegarLoop]: Abstraction has 17395 states and 25989 transitions. [2022-07-20 22:39:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17395 states and 25989 transitions. [2022-07-20 22:39:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-07-20 22:39:23,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:23,612 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:23,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:39:23,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-20 22:39:23,813 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash -653887438, now seen corresponding path program 1 times [2022-07-20 22:39:23,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:23,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657144268] [2022-07-20 22:39:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:23,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 3778 proven. 0 refuted. 0 times theorem prover too weak. 3118 trivial. 0 not checked. [2022-07-20 22:39:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657144268] [2022-07-20 22:39:24,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657144268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:24,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:24,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449985345] [2022-07-20 22:39:24,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:24,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:24,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:24,180 INFO L87 Difference]: Start difference. First operand 17395 states and 25989 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:25,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:26,010 INFO L93 Difference]: Finished difference Result 36035 states and 53691 transitions. [2022-07-20 22:39:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 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 851 [2022-07-20 22:39:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:26,034 INFO L225 Difference]: With dead ends: 36035 [2022-07-20 22:39:26,034 INFO L226 Difference]: Without dead ends: 18663 [2022-07-20 22:39:26,049 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 [2022-07-20 22:39:26,049 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 86 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:26,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 713 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 22:39:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18663 states. [2022-07-20 22:39:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18663 to 17395. [2022-07-20 22:39:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17395 states, 17394 states have (on average 1.4920087386455099) internal successors, (25952), 17394 states have internal predecessors, (25952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17395 states to 17395 states and 25952 transitions. [2022-07-20 22:39:26,461 INFO L78 Accepts]: Start accepts. Automaton has 17395 states and 25952 transitions. Word has length 851 [2022-07-20 22:39:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:26,462 INFO L495 AbstractCegarLoop]: Abstraction has 17395 states and 25952 transitions. [2022-07-20 22:39:26,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17395 states and 25952 transitions. [2022-07-20 22:39:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-07-20 22:39:26,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:26,482 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:26,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-20 22:39:26,483 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -570468491, now seen corresponding path program 1 times [2022-07-20 22:39:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013360019] [2022-07-20 22:39:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6959 backedges. 3806 proven. 0 refuted. 0 times theorem prover too weak. 3153 trivial. 0 not checked. [2022-07-20 22:39:26,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013360019] [2022-07-20 22:39:26,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013360019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:26,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:26,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:26,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471613856] [2022-07-20 22:39:26,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:26,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:26,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:26,854 INFO L87 Difference]: Start difference. First operand 17395 states and 25952 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:27,769 INFO L93 Difference]: Finished difference Result 36247 states and 53990 transitions. [2022-07-20 22:39:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 851 [2022-07-20 22:39:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:27,794 INFO L225 Difference]: With dead ends: 36247 [2022-07-20 22:39:27,794 INFO L226 Difference]: Without dead ends: 18875 [2022-07-20 22:39:27,810 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 [2022-07-20 22:39:27,810 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 29 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:27,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 647 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:39:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18875 states. [2022-07-20 22:39:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18875 to 18357. [2022-07-20 22:39:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18357 states, 18356 states have (on average 1.4883961647417738) internal successors, (27321), 18356 states have internal predecessors, (27321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18357 states to 18357 states and 27321 transitions. [2022-07-20 22:39:28,166 INFO L78 Accepts]: Start accepts. Automaton has 18357 states and 27321 transitions. Word has length 851 [2022-07-20 22:39:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:28,166 INFO L495 AbstractCegarLoop]: Abstraction has 18357 states and 27321 transitions. [2022-07-20 22:39:28,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 18357 states and 27321 transitions. [2022-07-20 22:39:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2022-07-20 22:39:28,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:28,189 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:28,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-20 22:39:28,190 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 407021035, now seen corresponding path program 1 times [2022-07-20 22:39:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833252917] [2022-07-20 22:39:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7175 backedges. 3954 proven. 0 refuted. 0 times theorem prover too weak. 3221 trivial. 0 not checked. [2022-07-20 22:39:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:28,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833252917] [2022-07-20 22:39:28,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833252917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:39:28,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:39:28,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:39:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229458705] [2022-07-20 22:39:28,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:39:28,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:39:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:39:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:39:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:39:28,637 INFO L87 Difference]: Start difference. First operand 18357 states and 27321 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:30,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:39:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:39:31,029 INFO L93 Difference]: Finished difference Result 37171 states and 55294 transitions. [2022-07-20 22:39:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:39:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 860 [2022-07-20 22:39:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:39:31,053 INFO L225 Difference]: With dead ends: 37171 [2022-07-20 22:39:31,053 INFO L226 Difference]: Without dead ends: 18837 [2022-07-20 22:39:31,069 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 [2022-07-20 22:39:31,069 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 43 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:39:31,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 662 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:39:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18837 states. [2022-07-20 22:39:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18837 to 18357. [2022-07-20 22:39:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18357 states, 18356 states have (on average 1.4873066027456963) internal successors, (27301), 18356 states have internal predecessors, (27301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18357 states to 18357 states and 27301 transitions. [2022-07-20 22:39:31,480 INFO L78 Accepts]: Start accepts. Automaton has 18357 states and 27301 transitions. Word has length 860 [2022-07-20 22:39:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:39:31,481 INFO L495 AbstractCegarLoop]: Abstraction has 18357 states and 27301 transitions. [2022-07-20 22:39:31,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:39:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 18357 states and 27301 transitions. [2022-07-20 22:39:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-07-20 22:39:31,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:39:31,502 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:39:31,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-20 22:39:31,503 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:39:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:39:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1326089202, now seen corresponding path program 1 times [2022-07-20 22:39:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:39:31,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978660568] [2022-07-20 22:39:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:39:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 1932 proven. 5072 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-20 22:39:36,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:39:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978660568] [2022-07-20 22:39:36,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978660568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:39:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377394866] [2022-07-20 22:39:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:39:36,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:39:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:39:36,016 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) [2022-07-20 22:39:36,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:39:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:39:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-20 22:39:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:39:37,719 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:39:37,719 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 [2022-07-20 22:39:37,844 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-20 22:39:37,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-07-20 22:39:37,921 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 [2022-07-20 22:39:37,959 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 6 treesize of output 5 [2022-07-20 22:39:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-20 22:39:38,034 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-20 22:39:38,034 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 2 case distinctions, treesize of input 41 treesize of output 60 [2022-07-20 22:39:38,045 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:39:38,046 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 1 case distinctions, treesize of input 73 treesize of output 66 [2022-07-20 22:39:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-07-20 22:39:38,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,689 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-20 22:39:38,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2022-07-20 22:39:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-20 22:39:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,772 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-20 22:39:38,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2022-07-20 22:39:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-20 22:39:38,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:38,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-20 22:39:39,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:39,532 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-20 22:39:39,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2022-07-20 22:39:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:39,573 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-20 22:39:39,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2022-07-20 22:39:39,626 INFO L356 Elim1Store]: treesize reduction 45, result has 52.6 percent of original size [2022-07-20 22:39:39,626 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 40 treesize of output 73 [2022-07-20 22:39:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 367 treesize of output 289 [2022-07-20 22:39:42,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:42,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 367 treesize of output 301 [2022-07-20 22:39:42,372 INFO L356 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2022-07-20 22:39:42,372 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 4 case distinctions, treesize of input 367 treesize of output 380 [2022-07-20 22:39:52,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 348 treesize of output 284 [2022-07-20 22:39:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 348 treesize of output 272 [2022-07-20 22:39:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,167 INFO L356 Elim1Store]: treesize reduction 105, result has 29.1 percent of original size [2022-07-20 22:39:52,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 357 treesize of output 342 [2022-07-20 22:39:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 273 treesize of output 195 [2022-07-20 22:39:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:39:52,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 195 treesize of output 111 [2022-07-20 22:39:52,814 INFO L356 Elim1Store]: treesize reduction 162, result has 24.3 percent of original size [2022-07-20 22:39:52,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 139 treesize of output 156 [2022-07-20 22:39:52,945 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-20 22:39:52,945 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 33 treesize of output 35 [2022-07-20 22:39:53,097 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:39:53,097 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 29 treesize of output 11 [2022-07-20 22:39:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 2322 proven. 666 refuted. 0 times theorem prover too weak. 4370 trivial. 0 not checked. [2022-07-20 22:39:53,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:39:59,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:39:59,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:39:59,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 714 treesize of output 552 [2022-07-20 22:39:59,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:39:59,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:39:59,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 924 treesize of output 768 [2022-07-20 22:40:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 2453 proven. 141 refuted. 0 times theorem prover too weak. 4764 trivial. 0 not checked. [2022-07-20 22:40:03,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377394866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:40:03,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:40:03,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 13] total 52 [2022-07-20 22:40:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620687519] [2022-07-20 22:40:03,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:40:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 22:40:03,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:40:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 22:40:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2365, Unknown=2, NotChecked=0, Total=2652 [2022-07-20 22:40:03,941 INFO L87 Difference]: Start difference. First operand 18357 states and 27301 transitions. Second operand has 52 states, 52 states have (on average 19.53846153846154) internal successors, (1016), 52 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:40:05,955 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 [] [2022-07-20 22:40:08,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:10,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:12,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:40:16,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:41:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:39,578 INFO L93 Difference]: Finished difference Result 297571 states and 433321 transitions. [2022-07-20 22:41:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 483 states. [2022-07-20 22:41:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 19.53846153846154) internal successors, (1016), 52 states have internal predecessors, (1016), 0 states have call successors, (0), 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 869 [2022-07-20 22:41:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:40,157 INFO L225 Difference]: With dead ends: 297571 [2022-07-20 22:41:40,157 INFO L226 Difference]: Without dead ends: 279237 [2022-07-20 22:41:40,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2755 GetRequests, 2134 SyntacticMatches, 104 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 143854 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=23041, Invalid=245799, Unknown=2, NotChecked=0, Total=268842 [2022-07-20 22:41:40,242 INFO L413 NwaCegarLoop]: 1410 mSDtfsCounter, 11906 mSDsluCounter, 27649 mSDsCounter, 0 mSdLazyCounter, 19951 mSolverCounterSat, 2059 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11906 SdHoareTripleChecker+Valid, 29059 SdHoareTripleChecker+Invalid, 26349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2059 IncrementalHoareTripleChecker+Valid, 19951 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 4337 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:41:40,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11906 Valid, 29059 Invalid, 26349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2059 Valid, 19951 Invalid, 2 Unknown, 4337 Unchecked, 37.3s Time] [2022-07-20 22:41:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279237 states.