./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:19:27,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:19:27,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:19:27,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:19:27,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:19:27,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:19:27,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:19:27,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:19:27,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:19:27,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:19:27,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:19:27,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:19:27,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:19:27,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:19:27,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:19:27,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:19:27,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:19:27,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:19:27,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:19:27,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:19:27,504 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:19:27,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:19:27,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:19:27,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:19:27,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:19:27,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:19:27,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:19:27,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:19:27,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:19:27,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:19:27,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:19:27,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:19:27,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:19:27,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:19:27,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:19:27,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:19:27,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:19:27,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:19:27,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:19:27,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:19:27,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:19:27,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:19:27,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:19:27,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:19:27,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:19:27,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:19:27,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:19:27,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:19:27,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:19:27,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:19:27,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:19:27,565 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:19:27,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:19:27,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:19:27,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:19:27,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:19:27,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:19:27,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:19:27,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:19:27,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:19:27,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:19:27,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:19:27,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:19:27,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:19:27,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:19:27,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:19:27,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:19:27,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:19:27,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:19:27,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:19:27,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:19:27,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:19:27,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:19:27,570 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:19:27,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:19:27,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:19:27,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 [2022-07-22 11:19:27,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:19:27,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:19:27,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:19:27,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:19:27,821 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:19:27,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2022-07-22 11:19:27,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a6d816fe/52b5fac0e2664a2ba750a0dc063f51f8/FLAGd08ea93d8 [2022-07-22 11:19:28,371 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:19:28,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2022-07-22 11:19:28,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a6d816fe/52b5fac0e2664a2ba750a0dc063f51f8/FLAGd08ea93d8 [2022-07-22 11:19:28,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a6d816fe/52b5fac0e2664a2ba750a0dc063f51f8 [2022-07-22 11:19:28,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:19:28,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:19:28,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:19:28,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:19:28,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:19:28,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:19:28" (1/1) ... [2022-07-22 11:19:28,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f603c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:28, skipping insertion in model container [2022-07-22 11:19:28,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:19:28" (1/1) ... [2022-07-22 11:19:28,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:19:28,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:19:29,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2022-07-22 11:19:29,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:19:29,146 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:19:29,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2022-07-22 11:19:29,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:19:29,239 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:19:29,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29 WrapperNode [2022-07-22 11:19:29,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:19:29,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:19:29,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:19:29,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:19:29,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,336 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 804 [2022-07-22 11:19:29,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:19:29,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:19:29,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:19:29,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:19:29,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:19:29,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:19:29,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:19:29,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:19:29,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (1/1) ... [2022-07-22 11:19:29,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:19:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:19:29,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:19:29,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:19:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:19:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:19:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:19:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:19:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:19:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:19:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:19:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:19:29,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:19:29,700 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:19:29,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:19:29,731 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:19:32,106 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-22 11:19:32,107 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-22 11:19:32,107 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:19:32,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:19:32,117 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:19:32,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:19:32 BoogieIcfgContainer [2022-07-22 11:19:32,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:19:32,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:19:32,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:19:32,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:19:32,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:19:28" (1/3) ... [2022-07-22 11:19:32,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f9a049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:19:32, skipping insertion in model container [2022-07-22 11:19:32,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:19:29" (2/3) ... [2022-07-22 11:19:32,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f9a049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:19:32, skipping insertion in model container [2022-07-22 11:19:32,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:19:32" (3/3) ... [2022-07-22 11:19:32,129 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-1.c [2022-07-22 11:19:32,143 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:19:32,144 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:19:32,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:19:32,229 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@1449a9c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7bf646f3 [2022-07-22 11:19:32,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:19:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:19:32,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:32,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:32,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777164, now seen corresponding path program 1 times [2022-07-22 11:19:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:32,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223185673] [2022-07-22 11:19:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:32,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223185673] [2022-07-22 11:19:32,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223185673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:32,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:32,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523521197] [2022-07-22 11:19:32,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:32,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:32,870 INFO L87 Difference]: Start difference. First operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 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 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:33,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:33,869 INFO L93 Difference]: Finished difference Result 439 states and 752 transitions. [2022-07-22 11:19:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 11:19:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:33,887 INFO L225 Difference]: With dead ends: 439 [2022-07-22 11:19:33,889 INFO L226 Difference]: Without dead ends: 268 [2022-07-22 11:19:33,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:33,899 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 168 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 477 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 [2022-07-22 11:19:33,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 477 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 11:19:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-22 11:19:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 183. [2022-07-22 11:19:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.620879120879121) internal successors, (295), 182 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 295 transitions. [2022-07-22 11:19:33,974 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 295 transitions. Word has length 45 [2022-07-22 11:19:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:33,975 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 295 transitions. [2022-07-22 11:19:33,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 295 transitions. [2022-07-22 11:19:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:19:33,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:33,982 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] [2022-07-22 11:19:33,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:19:33,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash -956498701, now seen corresponding path program 1 times [2022-07-22 11:19:33,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:33,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154444619] [2022-07-22 11:19:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154444619] [2022-07-22 11:19:34,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154444619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:34,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:34,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:34,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435786681] [2022-07-22 11:19:34,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:34,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:34,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:34,121 INFO L87 Difference]: Start difference. First operand 183 states and 295 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:34,680 INFO L93 Difference]: Finished difference Result 384 states and 617 transitions. [2022-07-22 11:19:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-07-22 11:19:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:34,682 INFO L225 Difference]: With dead ends: 384 [2022-07-22 11:19:34,682 INFO L226 Difference]: Without dead ends: 211 [2022-07-22 11:19:34,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:34,685 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 22 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:34,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 505 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:19:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-22 11:19:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 194. [2022-07-22 11:19:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.6269430051813472) internal successors, (314), 193 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 314 transitions. [2022-07-22 11:19:34,696 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 314 transitions. Word has length 46 [2022-07-22 11:19:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:34,696 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 314 transitions. [2022-07-22 11:19:34,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 314 transitions. [2022-07-22 11:19:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 11:19:34,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:34,698 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] [2022-07-22 11:19:34,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:19:34,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2145202459, now seen corresponding path program 1 times [2022-07-22 11:19:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:34,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571575035] [2022-07-22 11:19:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571575035] [2022-07-22 11:19:34,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571575035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:34,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:34,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:34,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17951727] [2022-07-22 11:19:34,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:34,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:34,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:34,827 INFO L87 Difference]: Start difference. First operand 194 states and 314 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:35,591 INFO L93 Difference]: Finished difference Result 530 states and 863 transitions. [2022-07-22 11:19:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 11:19:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:35,593 INFO L225 Difference]: With dead ends: 530 [2022-07-22 11:19:35,593 INFO L226 Difference]: Without dead ends: 357 [2022-07-22 11:19:35,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:35,595 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 157 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:35,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 678 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:19:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-22 11:19:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 226. [2022-07-22 11:19:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.6222222222222222) internal successors, (365), 225 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 365 transitions. [2022-07-22 11:19:35,615 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 365 transitions. Word has length 59 [2022-07-22 11:19:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:35,616 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 365 transitions. [2022-07-22 11:19:35,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 365 transitions. [2022-07-22 11:19:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:19:35,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:35,618 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] [2022-07-22 11:19:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:19:35,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash -218909964, now seen corresponding path program 1 times [2022-07-22 11:19:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:35,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616179665] [2022-07-22 11:19:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:35,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616179665] [2022-07-22 11:19:35,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616179665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:35,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:35,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901613534] [2022-07-22 11:19:35,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:35,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:35,784 INFO L87 Difference]: Start difference. First operand 226 states and 365 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:37,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:38,234 INFO L93 Difference]: Finished difference Result 538 states and 866 transitions. [2022-07-22 11:19:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:38,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 11:19:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:38,236 INFO L225 Difference]: With dead ends: 538 [2022-07-22 11:19:38,237 INFO L226 Difference]: Without dead ends: 333 [2022-07-22 11:19:38,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:38,238 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 162 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:38,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:19:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-22 11:19:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 226. [2022-07-22 11:19:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.6044444444444443) internal successors, (361), 225 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 361 transitions. [2022-07-22 11:19:38,257 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 361 transitions. Word has length 60 [2022-07-22 11:19:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:38,258 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 361 transitions. [2022-07-22 11:19:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 361 transitions. [2022-07-22 11:19:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:19:38,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:38,260 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] [2022-07-22 11:19:38,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:19:38,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1854445344, now seen corresponding path program 1 times [2022-07-22 11:19:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:38,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602942782] [2022-07-22 11:19:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:38,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:38,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:38,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602942782] [2022-07-22 11:19:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602942782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:38,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:38,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:38,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237932417] [2022-07-22 11:19:38,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:38,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:38,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:38,407 INFO L87 Difference]: Start difference. First operand 226 states and 361 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:39,245 INFO L93 Difference]: Finished difference Result 447 states and 711 transitions. [2022-07-22 11:19:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 11:19:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:39,247 INFO L225 Difference]: With dead ends: 447 [2022-07-22 11:19:39,247 INFO L226 Difference]: Without dead ends: 242 [2022-07-22 11:19:39,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:39,249 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 26 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:39,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 509 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:19:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-22 11:19:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 226. [2022-07-22 11:19:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.6) internal successors, (360), 225 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 360 transitions. [2022-07-22 11:19:39,263 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 360 transitions. Word has length 60 [2022-07-22 11:19:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:39,263 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 360 transitions. [2022-07-22 11:19:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 360 transitions. [2022-07-22 11:19:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:19:39,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:39,269 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] [2022-07-22 11:19:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:19:39,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1794705641, now seen corresponding path program 1 times [2022-07-22 11:19:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:39,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349808923] [2022-07-22 11:19:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:39,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349808923] [2022-07-22 11:19:39,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349808923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:39,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:39,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386051587] [2022-07-22 11:19:39,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:39,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:39,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:39,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:39,412 INFO L87 Difference]: Start difference. First operand 226 states and 360 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:40,397 INFO L93 Difference]: Finished difference Result 446 states and 709 transitions. [2022-07-22 11:19:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 11:19:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:40,399 INFO L225 Difference]: With dead ends: 446 [2022-07-22 11:19:40,399 INFO L226 Difference]: Without dead ends: 241 [2022-07-22 11:19:40,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:40,400 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 19 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:40,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 511 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:19:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-22 11:19:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 226. [2022-07-22 11:19:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5955555555555556) internal successors, (359), 225 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 359 transitions. [2022-07-22 11:19:40,412 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 359 transitions. Word has length 60 [2022-07-22 11:19:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 359 transitions. [2022-07-22 11:19:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 359 transitions. [2022-07-22 11:19:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:19:40,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:40,415 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] [2022-07-22 11:19:40,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:19:40,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -175581143, now seen corresponding path program 1 times [2022-07-22 11:19:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516521958] [2022-07-22 11:19:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516521958] [2022-07-22 11:19:40,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516521958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:40,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:40,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:40,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205818627] [2022-07-22 11:19:40,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:40,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:40,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:40,561 INFO L87 Difference]: Start difference. First operand 226 states and 359 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:41,242 INFO L93 Difference]: Finished difference Result 538 states and 857 transitions. [2022-07-22 11:19:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 11:19:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:41,245 INFO L225 Difference]: With dead ends: 538 [2022-07-22 11:19:41,245 INFO L226 Difference]: Without dead ends: 333 [2022-07-22 11:19:41,246 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 [2022-07-22 11:19:41,246 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 155 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:41,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:19:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-22 11:19:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 227. [2022-07-22 11:19:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.584070796460177) internal successors, (358), 226 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 358 transitions. [2022-07-22 11:19:41,257 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 358 transitions. Word has length 60 [2022-07-22 11:19:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:41,257 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 358 transitions. [2022-07-22 11:19:41,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 358 transitions. [2022-07-22 11:19:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:19:41,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:41,259 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] [2022-07-22 11:19:41,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:19:41,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 173549916, now seen corresponding path program 1 times [2022-07-22 11:19:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:41,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816162970] [2022-07-22 11:19:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:41,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816162970] [2022-07-22 11:19:41,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816162970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:41,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:41,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:41,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706137284] [2022-07-22 11:19:41,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:41,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:41,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:41,380 INFO L87 Difference]: Start difference. First operand 227 states and 358 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) [2022-07-22 11:19:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:41,933 INFO L93 Difference]: Finished difference Result 446 states and 705 transitions. [2022-07-22 11:19:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:41,934 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 [2022-07-22 11:19:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:41,935 INFO L225 Difference]: With dead ends: 446 [2022-07-22 11:19:41,935 INFO L226 Difference]: Without dead ends: 240 [2022-07-22 11:19:41,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:41,937 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 22 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 515 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 [2022-07-22 11:19:41,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:19:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-22 11:19:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2022-07-22 11:19:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.579646017699115) internal successors, (357), 226 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 357 transitions. [2022-07-22 11:19:41,943 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 357 transitions. Word has length 61 [2022-07-22 11:19:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:41,949 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 357 transitions. [2022-07-22 11:19:41,949 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) [2022-07-22 11:19:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 357 transitions. [2022-07-22 11:19:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:19:41,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:41,951 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] [2022-07-22 11:19:41,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:19:41,952 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash -830168645, now seen corresponding path program 1 times [2022-07-22 11:19:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:41,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116049965] [2022-07-22 11:19:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:41,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:42,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116049965] [2022-07-22 11:19:42,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116049965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:42,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:42,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464174039] [2022-07-22 11:19:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:42,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:42,048 INFO L87 Difference]: Start difference. First operand 227 states and 357 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) [2022-07-22 11:19:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:43,102 INFO L93 Difference]: Finished difference Result 446 states and 704 transitions. [2022-07-22 11:19:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:43,102 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 [2022-07-22 11:19:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:43,103 INFO L225 Difference]: With dead ends: 446 [2022-07-22 11:19:43,103 INFO L226 Difference]: Without dead ends: 240 [2022-07-22 11:19:43,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:43,105 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:43,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:19:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-22 11:19:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2022-07-22 11:19:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.575221238938053) internal successors, (356), 226 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 356 transitions. [2022-07-22 11:19:43,111 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 356 transitions. Word has length 62 [2022-07-22 11:19:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:43,111 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 356 transitions. [2022-07-22 11:19:43,112 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) [2022-07-22 11:19:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 356 transitions. [2022-07-22 11:19:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 11:19:43,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:43,113 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] [2022-07-22 11:19:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:19:43,113 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1327735145, now seen corresponding path program 1 times [2022-07-22 11:19:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494205234] [2022-07-22 11:19:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:43,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:43,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494205234] [2022-07-22 11:19:43,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494205234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:43,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:43,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:43,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919502290] [2022-07-22 11:19:43,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:43,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:43,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:43,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:43,205 INFO L87 Difference]: Start difference. First operand 227 states and 356 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) [2022-07-22 11:19:44,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:44,545 INFO L93 Difference]: Finished difference Result 436 states and 690 transitions. [2022-07-22 11:19:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:44,545 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 [2022-07-22 11:19:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:44,547 INFO L225 Difference]: With dead ends: 436 [2022-07-22 11:19:44,547 INFO L226 Difference]: Without dead ends: 230 [2022-07-22 11:19:44,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:44,548 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 11 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:44,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 529 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:19:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-22 11:19:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2022-07-22 11:19:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5707964601769913) internal successors, (355), 226 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 355 transitions. [2022-07-22 11:19:44,554 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 355 transitions. Word has length 63 [2022-07-22 11:19:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:44,554 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 355 transitions. [2022-07-22 11:19:44,554 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) [2022-07-22 11:19:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 355 transitions. [2022-07-22 11:19:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 11:19:44,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:44,555 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] [2022-07-22 11:19:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:19:44,556 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1179024943, now seen corresponding path program 1 times [2022-07-22 11:19:44,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:44,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004833387] [2022-07-22 11:19:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:44,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:44,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004833387] [2022-07-22 11:19:44,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004833387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:44,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:44,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878162323] [2022-07-22 11:19:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:44,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:44,664 INFO L87 Difference]: Start difference. First operand 227 states and 355 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) [2022-07-22 11:19:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:45,040 INFO L93 Difference]: Finished difference Result 473 states and 745 transitions. [2022-07-22 11:19:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:45,041 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 [2022-07-22 11:19:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:45,042 INFO L225 Difference]: With dead ends: 473 [2022-07-22 11:19:45,042 INFO L226 Difference]: Without dead ends: 267 [2022-07-22 11:19:45,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:45,044 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 31 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:45,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 533 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:19:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-22 11:19:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 249. [2022-07-22 11:19:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5725806451612903) internal successors, (390), 248 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 390 transitions. [2022-07-22 11:19:45,050 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 390 transitions. Word has length 63 [2022-07-22 11:19:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:45,051 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 390 transitions. [2022-07-22 11:19:45,051 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) [2022-07-22 11:19:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 390 transitions. [2022-07-22 11:19:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 11:19:45,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:45,053 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] [2022-07-22 11:19:45,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:19:45,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1124593380, now seen corresponding path program 1 times [2022-07-22 11:19:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871498533] [2022-07-22 11:19:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:45,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:45,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871498533] [2022-07-22 11:19:45,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871498533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:45,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:45,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:45,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529772870] [2022-07-22 11:19:45,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:45,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:45,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:45,157 INFO L87 Difference]: Start difference. First operand 249 states and 390 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) [2022-07-22 11:19:47,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:47,397 INFO L93 Difference]: Finished difference Result 583 states and 921 transitions. [2022-07-22 11:19:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-22 11:19:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:47,399 INFO L225 Difference]: With dead ends: 583 [2022-07-22 11:19:47,399 INFO L226 Difference]: Without dead ends: 355 [2022-07-22 11:19:47,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:47,400 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 160 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:47,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:19:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-22 11:19:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2022-07-22 11:19:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5564516129032258) internal successors, (386), 248 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 386 transitions. [2022-07-22 11:19:47,407 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 386 transitions. Word has length 77 [2022-07-22 11:19:47,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:47,408 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 386 transitions. [2022-07-22 11:19:47,408 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) [2022-07-22 11:19:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 386 transitions. [2022-07-22 11:19:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 11:19:47,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:47,409 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] [2022-07-22 11:19:47,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:19:47,409 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1770409691, now seen corresponding path program 1 times [2022-07-22 11:19:47,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:47,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252295840] [2022-07-22 11:19:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:47,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:47,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252295840] [2022-07-22 11:19:47,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252295840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:47,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:47,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:47,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433776729] [2022-07-22 11:19:47,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:47,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:47,528 INFO L87 Difference]: Start difference. First operand 249 states and 386 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) [2022-07-22 11:19:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:47,990 INFO L93 Difference]: Finished difference Result 494 states and 770 transitions. [2022-07-22 11:19:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-22 11:19:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:47,992 INFO L225 Difference]: With dead ends: 494 [2022-07-22 11:19:47,993 INFO L226 Difference]: Without dead ends: 266 [2022-07-22 11:19:47,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:47,994 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 33 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:47,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 535 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:19:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-22 11:19:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 249. [2022-07-22 11:19:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5524193548387097) internal successors, (385), 248 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) [2022-07-22 11:19:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 385 transitions. [2022-07-22 11:19:48,011 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 385 transitions. Word has length 77 [2022-07-22 11:19:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:48,012 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 385 transitions. [2022-07-22 11:19:48,012 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) [2022-07-22 11:19:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 385 transitions. [2022-07-22 11:19:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 11:19:48,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:48,013 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] [2022-07-22 11:19:48,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:19:48,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1324124320, now seen corresponding path program 1 times [2022-07-22 11:19:48,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:48,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125238508] [2022-07-22 11:19:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125238508] [2022-07-22 11:19:48,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125238508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:48,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:48,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019959104] [2022-07-22 11:19:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:48,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:48,127 INFO L87 Difference]: Start difference. First operand 249 states and 385 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:49,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:49,730 INFO L93 Difference]: Finished difference Result 583 states and 911 transitions. [2022-07-22 11:19:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:49,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-22 11:19:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:49,733 INFO L225 Difference]: With dead ends: 583 [2022-07-22 11:19:49,733 INFO L226 Difference]: Without dead ends: 355 [2022-07-22 11:19:49,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:49,734 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 158 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:49,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:19:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-22 11:19:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2022-07-22 11:19:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5362903225806452) internal successors, (381), 248 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 381 transitions. [2022-07-22 11:19:49,741 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 381 transitions. Word has length 78 [2022-07-22 11:19:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:49,741 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 381 transitions. [2022-07-22 11:19:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 381 transitions. [2022-07-22 11:19:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 11:19:49,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:49,742 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] [2022-07-22 11:19:49,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:19:49,742 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash 477899511, now seen corresponding path program 1 times [2022-07-22 11:19:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:49,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093148894] [2022-07-22 11:19:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093148894] [2022-07-22 11:19:49,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093148894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:49,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:49,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990449182] [2022-07-22 11:19:49,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:49,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:49,864 INFO L87 Difference]: Start difference. First operand 249 states and 381 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) [2022-07-22 11:19:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:50,575 INFO L93 Difference]: Finished difference Result 583 states and 903 transitions. [2022-07-22 11:19:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:50,575 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 [2022-07-22 11:19:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:50,577 INFO L225 Difference]: With dead ends: 583 [2022-07-22 11:19:50,577 INFO L226 Difference]: Without dead ends: 355 [2022-07-22 11:19:50,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:50,578 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 156 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:50,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 370 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:19:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-22 11:19:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2022-07-22 11:19:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5201612903225807) internal successors, (377), 248 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) [2022-07-22 11:19:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 377 transitions. [2022-07-22 11:19:50,585 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 377 transitions. Word has length 79 [2022-07-22 11:19:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:50,585 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 377 transitions. [2022-07-22 11:19:50,585 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) [2022-07-22 11:19:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 377 transitions. [2022-07-22 11:19:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 11:19:50,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:50,586 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] [2022-07-22 11:19:50,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:19:50,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 567672027, now seen corresponding path program 1 times [2022-07-22 11:19:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343260739] [2022-07-22 11:19:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:19:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:50,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343260739] [2022-07-22 11:19:50,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343260739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:50,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:50,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259659656] [2022-07-22 11:19:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:50,689 INFO L87 Difference]: Start difference. First operand 249 states and 377 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) [2022-07-22 11:19:52,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:53,009 INFO L93 Difference]: Finished difference Result 573 states and 882 transitions. [2022-07-22 11:19:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:53,009 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 [2022-07-22 11:19:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:53,011 INFO L225 Difference]: With dead ends: 573 [2022-07-22 11:19:53,011 INFO L226 Difference]: Without dead ends: 345 [2022-07-22 11:19:53,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:53,012 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 147 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:53,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 390 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:19:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-22 11:19:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 249. [2022-07-22 11:19:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5040322580645162) internal successors, (373), 248 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) [2022-07-22 11:19:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 373 transitions. [2022-07-22 11:19:53,018 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 373 transitions. Word has length 80 [2022-07-22 11:19:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:53,018 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 373 transitions. [2022-07-22 11:19:53,018 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) [2022-07-22 11:19:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 373 transitions. [2022-07-22 11:19:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 11:19:53,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:53,021 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] [2022-07-22 11:19:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:19:53,021 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1809042218, now seen corresponding path program 1 times [2022-07-22 11:19:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350406349] [2022-07-22 11:19:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:19:53,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350406349] [2022-07-22 11:19:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350406349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:53,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:53,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191187407] [2022-07-22 11:19:53,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:53,170 INFO L87 Difference]: Start difference. First operand 249 states and 373 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:55,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:55,479 INFO L93 Difference]: Finished difference Result 573 states and 874 transitions. [2022-07-22 11:19:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-22 11:19:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:55,481 INFO L225 Difference]: With dead ends: 573 [2022-07-22 11:19:55,481 INFO L226 Difference]: Without dead ends: 345 [2022-07-22 11:19:55,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:55,482 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 121 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:55,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 412 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:19:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-22 11:19:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 272. [2022-07-22 11:19:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.5424354243542435) internal successors, (418), 271 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 418 transitions. [2022-07-22 11:19:55,489 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 418 transitions. Word has length 85 [2022-07-22 11:19:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 418 transitions. [2022-07-22 11:19:55,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 418 transitions. [2022-07-22 11:19:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 11:19:55,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:55,491 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] [2022-07-22 11:19:55,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:19:55,491 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash -444443904, now seen corresponding path program 1 times [2022-07-22 11:19:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50331889] [2022-07-22 11:19:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:55,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:19:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50331889] [2022-07-22 11:19:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50331889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:55,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:55,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515684479] [2022-07-22 11:19:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:55,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:55,654 INFO L87 Difference]: Start difference. First operand 272 states and 418 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:56,380 INFO L93 Difference]: Finished difference Result 611 states and 946 transitions. [2022-07-22 11:19:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-22 11:19:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:56,383 INFO L225 Difference]: With dead ends: 611 [2022-07-22 11:19:56,383 INFO L226 Difference]: Without dead ends: 360 [2022-07-22 11:19:56,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:56,384 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 86 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:56,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 511 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:19:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-22 11:19:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 306. [2022-07-22 11:19:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.544262295081967) internal successors, (471), 305 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 471 transitions. [2022-07-22 11:19:56,392 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 471 transitions. Word has length 113 [2022-07-22 11:19:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:56,392 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 471 transitions. [2022-07-22 11:19:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 471 transitions. [2022-07-22 11:19:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 11:19:56,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:56,394 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] [2022-07-22 11:19:56,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:19:56,394 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1464013886, now seen corresponding path program 1 times [2022-07-22 11:19:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:56,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946535422] [2022-07-22 11:19:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:19:56,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946535422] [2022-07-22 11:19:56,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946535422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:56,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:56,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344152004] [2022-07-22 11:19:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:56,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:56,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:56,510 INFO L87 Difference]: Start difference. First operand 306 states and 471 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:57,181 INFO L93 Difference]: Finished difference Result 740 states and 1152 transitions. [2022-07-22 11:19:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-22 11:19:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:57,183 INFO L225 Difference]: With dead ends: 740 [2022-07-22 11:19:57,183 INFO L226 Difference]: Without dead ends: 455 [2022-07-22 11:19:57,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:57,185 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:57,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 400 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:19:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-22 11:19:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 336. [2022-07-22 11:19:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5522388059701493) internal successors, (520), 335 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 520 transitions. [2022-07-22 11:19:57,194 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 520 transitions. Word has length 113 [2022-07-22 11:19:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:57,194 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 520 transitions. [2022-07-22 11:19:57,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 520 transitions. [2022-07-22 11:19:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 11:19:57,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:57,201 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] [2022-07-22 11:19:57,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:19:57,201 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash 283071561, now seen corresponding path program 1 times [2022-07-22 11:19:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:57,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079097072] [2022-07-22 11:19:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:19:57,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079097072] [2022-07-22 11:19:57,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079097072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:57,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:57,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513948610] [2022-07-22 11:19:57,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:57,337 INFO L87 Difference]: Start difference. First operand 336 states and 520 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:58,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:58,795 INFO L93 Difference]: Finished difference Result 764 states and 1187 transitions. [2022-07-22 11:19:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-22 11:19:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:58,797 INFO L225 Difference]: With dead ends: 764 [2022-07-22 11:19:58,797 INFO L226 Difference]: Without dead ends: 449 [2022-07-22 11:19:58,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:58,798 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 123 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:58,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 388 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:19:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-22 11:19:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 373. [2022-07-22 11:19:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.5564516129032258) internal successors, (579), 372 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 579 transitions. [2022-07-22 11:19:58,807 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 579 transitions. Word has length 119 [2022-07-22 11:19:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:58,807 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 579 transitions. [2022-07-22 11:19:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 579 transitions. [2022-07-22 11:19:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:19:58,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:58,809 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] [2022-07-22 11:19:58,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:19:58,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:58,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1331910876, now seen corresponding path program 1 times [2022-07-22 11:19:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:58,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157624746] [2022-07-22 11:19:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:58,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:19:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157624746] [2022-07-22 11:19:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157624746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:58,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:58,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:19:58,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394061363] [2022-07-22 11:19:58,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:58,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:19:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:19:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:19:58,940 INFO L87 Difference]: Start difference. First operand 373 states and 579 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:59,966 INFO L93 Difference]: Finished difference Result 810 states and 1262 transitions. [2022-07-22 11:19:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:19:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 11:19:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:59,969 INFO L225 Difference]: With dead ends: 810 [2022-07-22 11:19:59,969 INFO L226 Difference]: Without dead ends: 458 [2022-07-22 11:19:59,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:59,970 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 75 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:59,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 513 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:19:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-22 11:19:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 413. [2022-07-22 11:19:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.558252427184466) internal successors, (642), 412 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 642 transitions. [2022-07-22 11:19:59,980 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 642 transitions. Word has length 120 [2022-07-22 11:19:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:59,981 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 642 transitions. [2022-07-22 11:19:59,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 642 transitions. [2022-07-22 11:19:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:19:59,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:59,983 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] [2022-07-22 11:19:59,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:19:59,983 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1304845274, now seen corresponding path program 1 times [2022-07-22 11:19:59,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:59,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821110431] [2022-07-22 11:19:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:20:00,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:00,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821110431] [2022-07-22 11:20:00,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821110431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:00,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:00,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:00,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579823438] [2022-07-22 11:20:00,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:00,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:00,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:00,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:00,093 INFO L87 Difference]: Start difference. First operand 413 states and 642 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:01,161 INFO L93 Difference]: Finished difference Result 842 states and 1313 transitions. [2022-07-22 11:20:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:01,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 11:20:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:01,165 INFO L225 Difference]: With dead ends: 842 [2022-07-22 11:20:01,165 INFO L226 Difference]: Without dead ends: 450 [2022-07-22 11:20:01,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:01,167 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 28 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:01,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 613 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:20:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-22 11:20:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 437. [2022-07-22 11:20:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5527522935779816) internal successors, (677), 436 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 677 transitions. [2022-07-22 11:20:01,177 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 677 transitions. Word has length 120 [2022-07-22 11:20:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:01,177 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 677 transitions. [2022-07-22 11:20:01,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 677 transitions. [2022-07-22 11:20:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 11:20:01,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:01,179 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] [2022-07-22 11:20:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:20:01,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1360190488, now seen corresponding path program 1 times [2022-07-22 11:20:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:01,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551386871] [2022-07-22 11:20:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:01,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:20:01,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551386871] [2022-07-22 11:20:01,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551386871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:01,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:01,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:01,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087605143] [2022-07-22 11:20:01,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:01,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:01,326 INFO L87 Difference]: Start difference. First operand 437 states and 677 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:02,131 INFO L93 Difference]: Finished difference Result 891 states and 1383 transitions. [2022-07-22 11:20:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-22 11:20:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:02,133 INFO L225 Difference]: With dead ends: 891 [2022-07-22 11:20:02,133 INFO L226 Difference]: Without dead ends: 475 [2022-07-22 11:20:02,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:02,134 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 61 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:02,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 519 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:20:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-22 11:20:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 440. [2022-07-22 11:20:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5489749430523918) internal successors, (680), 439 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 680 transitions. [2022-07-22 11:20:02,148 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 680 transitions. Word has length 127 [2022-07-22 11:20:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:02,148 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 680 transitions. [2022-07-22 11:20:02,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 680 transitions. [2022-07-22 11:20:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 11:20:02,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:02,151 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] [2022-07-22 11:20:02,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:20:02,151 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 276854958, now seen corresponding path program 1 times [2022-07-22 11:20:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127609191] [2022-07-22 11:20:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:02,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:02,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127609191] [2022-07-22 11:20:02,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127609191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:02,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:02,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:02,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232389147] [2022-07-22 11:20:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:02,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:02,269 INFO L87 Difference]: Start difference. First operand 440 states and 680 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:02,964 INFO L93 Difference]: Finished difference Result 893 states and 1384 transitions. [2022-07-22 11:20:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 134 [2022-07-22 11:20:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:02,966 INFO L225 Difference]: With dead ends: 893 [2022-07-22 11:20:02,966 INFO L226 Difference]: Without dead ends: 474 [2022-07-22 11:20:02,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:02,967 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 83 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:02,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 521 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:20:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-22 11:20:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 440. [2022-07-22 11:20:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5466970387243735) internal successors, (679), 439 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 679 transitions. [2022-07-22 11:20:02,976 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 679 transitions. Word has length 134 [2022-07-22 11:20:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:02,977 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 679 transitions. [2022-07-22 11:20:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 679 transitions. [2022-07-22 11:20:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 11:20:02,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:02,979 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] [2022-07-22 11:20:02,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:20:02,979 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1663727056, now seen corresponding path program 1 times [2022-07-22 11:20:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:02,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480372650] [2022-07-22 11:20:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480372650] [2022-07-22 11:20:03,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480372650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:03,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:03,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028036369] [2022-07-22 11:20:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:03,101 INFO L87 Difference]: Start difference. First operand 440 states and 679 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:03,487 INFO L93 Difference]: Finished difference Result 871 states and 1350 transitions. [2022-07-22 11:20:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 134 [2022-07-22 11:20:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:03,489 INFO L225 Difference]: With dead ends: 871 [2022-07-22 11:20:03,489 INFO L226 Difference]: Without dead ends: 452 [2022-07-22 11:20:03,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:03,491 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 33 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:03,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 613 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:20:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-22 11:20:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 440. [2022-07-22 11:20:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5444191343963554) internal successors, (678), 439 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 678 transitions. [2022-07-22 11:20:03,500 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 678 transitions. Word has length 134 [2022-07-22 11:20:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:03,500 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 678 transitions. [2022-07-22 11:20:03,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 678 transitions. [2022-07-22 11:20:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-22 11:20:03,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:03,502 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] [2022-07-22 11:20:03,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 11:20:03,502 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:03,502 INFO L85 PathProgramCache]: Analyzing trace with hash 455121871, now seen corresponding path program 1 times [2022-07-22 11:20:03,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:03,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041229365] [2022-07-22 11:20:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:03,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 11:20:03,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041229365] [2022-07-22 11:20:03,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041229365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:03,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:03,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:03,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356125008] [2022-07-22 11:20:03,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:03,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:03,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:03,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:03,654 INFO L87 Difference]: Start difference. First operand 440 states and 678 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:05,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:05,886 INFO L93 Difference]: Finished difference Result 972 states and 1502 transitions. [2022-07-22 11:20:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-22 11:20:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:05,888 INFO L225 Difference]: With dead ends: 972 [2022-07-22 11:20:05,888 INFO L226 Difference]: Without dead ends: 553 [2022-07-22 11:20:05,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:05,890 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 130 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:05,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 412 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:20:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-22 11:20:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 470. [2022-07-22 11:20:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.535181236673774) internal successors, (720), 469 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 720 transitions. [2022-07-22 11:20:05,900 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 720 transitions. Word has length 140 [2022-07-22 11:20:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:05,901 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 720 transitions. [2022-07-22 11:20:05,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 720 transitions. [2022-07-22 11:20:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-22 11:20:05,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:05,902 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] [2022-07-22 11:20:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 11:20:05,903 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1379537561, now seen corresponding path program 1 times [2022-07-22 11:20:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543489705] [2022-07-22 11:20:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-22 11:20:06,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:06,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543489705] [2022-07-22 11:20:06,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543489705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:06,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:06,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:06,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770884906] [2022-07-22 11:20:06,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:06,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:06,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:06,037 INFO L87 Difference]: Start difference. First operand 470 states and 720 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) [2022-07-22 11:20:07,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:08,179 INFO L93 Difference]: Finished difference Result 992 states and 1522 transitions. [2022-07-22 11:20:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:08,180 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 141 [2022-07-22 11:20:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:08,182 INFO L225 Difference]: With dead ends: 992 [2022-07-22 11:20:08,182 INFO L226 Difference]: Without dead ends: 543 [2022-07-22 11:20:08,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:08,183 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 129 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:08,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 388 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:20:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-22 11:20:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 470. [2022-07-22 11:20:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.5223880597014925) internal successors, (714), 469 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 714 transitions. [2022-07-22 11:20:08,193 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 714 transitions. Word has length 141 [2022-07-22 11:20:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:08,193 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 714 transitions. [2022-07-22 11:20:08,193 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) [2022-07-22 11:20:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 714 transitions. [2022-07-22 11:20:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:08,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:08,195 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] [2022-07-22 11:20:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 11:20:08,195 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 994754571, now seen corresponding path program 1 times [2022-07-22 11:20:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86294733] [2022-07-22 11:20:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:08,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:20:08,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86294733] [2022-07-22 11:20:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86294733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:08,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:08,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:08,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902129440] [2022-07-22 11:20:08,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:08,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:08,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:08,309 INFO L87 Difference]: Start difference. First operand 470 states and 714 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:09,574 INFO L93 Difference]: Finished difference Result 951 states and 1450 transitions. [2022-07-22 11:20:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 [2022-07-22 11:20:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:09,577 INFO L225 Difference]: With dead ends: 951 [2022-07-22 11:20:09,577 INFO L226 Difference]: Without dead ends: 502 [2022-07-22 11:20:09,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:09,578 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 73 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:09,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 539 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:20:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-07-22 11:20:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 470. [2022-07-22 11:20:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.5202558635394456) internal successors, (713), 469 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 713 transitions. [2022-07-22 11:20:09,588 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 713 transitions. Word has length 142 [2022-07-22 11:20:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:09,588 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 713 transitions. [2022-07-22 11:20:09,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 713 transitions. [2022-07-22 11:20:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:09,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:09,590 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] [2022-07-22 11:20:09,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:20:09,590 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2025795469, now seen corresponding path program 1 times [2022-07-22 11:20:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639690588] [2022-07-22 11:20:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:09,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:20:09,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:09,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639690588] [2022-07-22 11:20:09,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639690588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:09,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:09,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:09,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23791234] [2022-07-22 11:20:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:09,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:09,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:09,704 INFO L87 Difference]: Start difference. First operand 470 states and 713 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:09,774 INFO L93 Difference]: Finished difference Result 1365 states and 2087 transitions. [2022-07-22 11:20:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-22 11:20:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:09,777 INFO L225 Difference]: With dead ends: 1365 [2022-07-22 11:20:09,777 INFO L226 Difference]: Without dead ends: 916 [2022-07-22 11:20:09,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:09,783 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:09,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 440 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-07-22 11:20:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 916. [2022-07-22 11:20:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.5114754098360657) internal successors, (1383), 915 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1383 transitions. [2022-07-22 11:20:09,801 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1383 transitions. Word has length 142 [2022-07-22 11:20:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:09,801 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1383 transitions. [2022-07-22 11:20:09,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1383 transitions. [2022-07-22 11:20:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:09,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:09,803 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] [2022-07-22 11:20:09,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:20:09,804 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash 718653071, now seen corresponding path program 1 times [2022-07-22 11:20:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:09,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913858790] [2022-07-22 11:20:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-22 11:20:09,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913858790] [2022-07-22 11:20:09,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913858790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:09,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:09,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:09,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767931555] [2022-07-22 11:20:09,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:09,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:09,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:09,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:09,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:09,913 INFO L87 Difference]: Start difference. First operand 916 states and 1383 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:09,955 INFO L93 Difference]: Finished difference Result 1838 states and 2778 transitions. [2022-07-22 11:20:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:09,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2022-07-22 11:20:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:09,958 INFO L225 Difference]: With dead ends: 1838 [2022-07-22 11:20:09,958 INFO L226 Difference]: Without dead ends: 943 [2022-07-22 11:20:09,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:09,960 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:09,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 422 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-07-22 11:20:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 943. [2022-07-22 11:20:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.505307855626327) internal successors, (1418), 942 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1418 transitions. [2022-07-22 11:20:09,989 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1418 transitions. Word has length 142 [2022-07-22 11:20:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:09,990 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1418 transitions. [2022-07-22 11:20:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1418 transitions. [2022-07-22 11:20:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 11:20:09,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:09,992 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] [2022-07-22 11:20:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 11:20:09,992 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1206700177, now seen corresponding path program 1 times [2022-07-22 11:20:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:09,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796302353] [2022-07-22 11:20:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-22 11:20:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:10,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796302353] [2022-07-22 11:20:10,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796302353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:10,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:10,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948581085] [2022-07-22 11:20:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:10,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:10,080 INFO L87 Difference]: Start difference. First operand 943 states and 1418 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:10,115 INFO L93 Difference]: Finished difference Result 1867 states and 2814 transitions. [2022-07-22 11:20:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-22 11:20:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:10,119 INFO L225 Difference]: With dead ends: 1867 [2022-07-22 11:20:10,119 INFO L226 Difference]: Without dead ends: 945 [2022-07-22 11:20:10,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:10,121 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:10,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 401 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-07-22 11:20:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 945. [2022-07-22 11:20:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.5042372881355932) internal successors, (1420), 944 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1420 transitions. [2022-07-22 11:20:10,138 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1420 transitions. Word has length 142 [2022-07-22 11:20:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:10,139 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1420 transitions. [2022-07-22 11:20:10,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1420 transitions. [2022-07-22 11:20:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 11:20:10,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:10,141 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] [2022-07-22 11:20:10,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 11:20:10,142 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash 318669239, now seen corresponding path program 1 times [2022-07-22 11:20:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:10,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660485384] [2022-07-22 11:20:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:10,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:20:10,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660485384] [2022-07-22 11:20:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660485384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:10,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256605932] [2022-07-22 11:20:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:10,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:10,258 INFO L87 Difference]: Start difference. First operand 945 states and 1420 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:10,329 INFO L93 Difference]: Finished difference Result 2313 states and 3499 transitions. [2022-07-22 11:20:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2022-07-22 11:20:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:10,334 INFO L225 Difference]: With dead ends: 2313 [2022-07-22 11:20:10,335 INFO L226 Difference]: Without dead ends: 1391 [2022-07-22 11:20:10,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:10,338 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 153 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:10,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 582 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-07-22 11:20:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1391. [2022-07-22 11:20:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 1.5035971223021583) internal successors, (2090), 1390 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2090 transitions. [2022-07-22 11:20:10,365 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2090 transitions. Word has length 144 [2022-07-22 11:20:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:10,365 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 2090 transitions. [2022-07-22 11:20:10,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2090 transitions. [2022-07-22 11:20:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-22 11:20:10,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:10,368 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] [2022-07-22 11:20:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 11:20:10,369 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1872672834, now seen corresponding path program 1 times [2022-07-22 11:20:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:10,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858053074] [2022-07-22 11:20:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-22 11:20:10,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858053074] [2022-07-22 11:20:10,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858053074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:10,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:10,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:10,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438508337] [2022-07-22 11:20:10,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:10,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:10,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:10,510 INFO L87 Difference]: Start difference. First operand 1391 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:11,291 INFO L93 Difference]: Finished difference Result 2912 states and 4381 transitions. [2022-07-22 11:20:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:11,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-22 11:20:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:11,296 INFO L225 Difference]: With dead ends: 2912 [2022-07-22 11:20:11,297 INFO L226 Difference]: Without dead ends: 1544 [2022-07-22 11:20:11,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:11,299 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 42 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:11,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 629 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:20:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-07-22 11:20:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1475. [2022-07-22 11:20:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 1.505427408412483) internal successors, (2219), 1474 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2219 transitions. [2022-07-22 11:20:11,325 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2219 transitions. Word has length 173 [2022-07-22 11:20:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:11,326 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 2219 transitions. [2022-07-22 11:20:11,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2219 transitions. [2022-07-22 11:20:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-22 11:20:11,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:11,329 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] [2022-07-22 11:20:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-22 11:20:11,329 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 967508936, now seen corresponding path program 1 times [2022-07-22 11:20:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290473295] [2022-07-22 11:20:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-22 11:20:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290473295] [2022-07-22 11:20:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290473295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:11,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:11,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791754006] [2022-07-22 11:20:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:11,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:11,464 INFO L87 Difference]: Start difference. First operand 1475 states and 2219 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) [2022-07-22 11:20:12,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:12,891 INFO L93 Difference]: Finished difference Result 3138 states and 4698 transitions. [2022-07-22 11:20:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:12,892 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 187 [2022-07-22 11:20:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:12,897 INFO L225 Difference]: With dead ends: 3138 [2022-07-22 11:20:12,897 INFO L226 Difference]: Without dead ends: 1686 [2022-07-22 11:20:12,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:12,899 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 141 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:12,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 390 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:20:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-07-22 11:20:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1475. [2022-07-22 11:20:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 1.491180461329715) internal successors, (2198), 1474 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2198 transitions. [2022-07-22 11:20:12,928 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2198 transitions. Word has length 187 [2022-07-22 11:20:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:12,945 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 2198 transitions. [2022-07-22 11:20:12,945 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) [2022-07-22 11:20:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2198 transitions. [2022-07-22 11:20:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-22 11:20:12,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:12,948 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] [2022-07-22 11:20:12,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-22 11:20:12,949 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:12,950 INFO L85 PathProgramCache]: Analyzing trace with hash -777154267, now seen corresponding path program 1 times [2022-07-22 11:20:12,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:12,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78917541] [2022-07-22 11:20:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:12,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 11:20:13,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:13,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78917541] [2022-07-22 11:20:13,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78917541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766828694] [2022-07-22 11:20:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:13,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:13,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:20:13,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:20:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:20:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-22 11:20:14,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:20:14,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766828694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:14,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:20:14,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 11:20:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110004763] [2022-07-22 11:20:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:14,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:14,027 INFO L87 Difference]: Start difference. First operand 1475 states and 2198 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:14,104 INFO L93 Difference]: Finished difference Result 3402 states and 5092 transitions. [2022-07-22 11:20:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:14,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-22 11:20:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:14,111 INFO L225 Difference]: With dead ends: 3402 [2022-07-22 11:20:14,111 INFO L226 Difference]: Without dead ends: 1950 [2022-07-22 11:20:14,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:20:14,114 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:14,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 381 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:20:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-07-22 11:20:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1950. [2022-07-22 11:20:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 1.4930733709594664) internal successors, (2910), 1949 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 2910 transitions. [2022-07-22 11:20:14,155 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 2910 transitions. Word has length 195 [2022-07-22 11:20:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:14,155 INFO L495 AbstractCegarLoop]: Abstraction has 1950 states and 2910 transitions. [2022-07-22 11:20:14,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 2910 transitions. [2022-07-22 11:20:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-22 11:20:14,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:14,160 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] [2022-07-22 11:20:14,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:20:14,375 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 [2022-07-22 11:20:14,376 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1785235534, now seen corresponding path program 1 times [2022-07-22 11:20:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224240591] [2022-07-22 11:20:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-22 11:20:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224240591] [2022-07-22 11:20:14,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224240591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:14,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:14,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762574571] [2022-07-22 11:20:14,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:14,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:14,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:14,552 INFO L87 Difference]: Start difference. First operand 1950 states and 2910 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2022-07-22 11:20:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:14,640 INFO L93 Difference]: Finished difference Result 4352 states and 6516 transitions. [2022-07-22 11:20:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:14,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 197 [2022-07-22 11:20:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:14,649 INFO L225 Difference]: With dead ends: 4352 [2022-07-22 11:20:14,650 INFO L226 Difference]: Without dead ends: 2425 [2022-07-22 11:20:14,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:14,654 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:14,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 380 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-07-22 11:20:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2425. [2022-07-22 11:20:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.4946369636963697) internal successors, (3623), 2424 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 3623 transitions. [2022-07-22 11:20:14,706 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 3623 transitions. Word has length 197 [2022-07-22 11:20:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:14,707 INFO L495 AbstractCegarLoop]: Abstraction has 2425 states and 3623 transitions. [2022-07-22 11:20:14,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2022-07-22 11:20:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 3623 transitions. [2022-07-22 11:20:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-22 11:20:14,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:14,712 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] [2022-07-22 11:20:14,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 11:20:14,713 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1494612329, now seen corresponding path program 1 times [2022-07-22 11:20:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:14,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643389785] [2022-07-22 11:20:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:14,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 11:20:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643389785] [2022-07-22 11:20:14,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643389785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:14,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:14,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:14,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109669078] [2022-07-22 11:20:14,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:14,906 INFO L87 Difference]: Start difference. First operand 2425 states and 3623 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) [2022-07-22 11:20:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:15,001 INFO L93 Difference]: Finished difference Result 5302 states and 7942 transitions. [2022-07-22 11:20:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:15,002 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 236 [2022-07-22 11:20:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:15,027 INFO L225 Difference]: With dead ends: 5302 [2022-07-22 11:20:15,028 INFO L226 Difference]: Without dead ends: 2900 [2022-07-22 11:20:15,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:15,032 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:15,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 379 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2022-07-22 11:20:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2900. [2022-07-22 11:20:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 1.4960331148671955) internal successors, (4337), 2899 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 4337 transitions. [2022-07-22 11:20:15,125 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 4337 transitions. Word has length 236 [2022-07-22 11:20:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:15,126 INFO L495 AbstractCegarLoop]: Abstraction has 2900 states and 4337 transitions. [2022-07-22 11:20:15,126 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) [2022-07-22 11:20:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 4337 transitions. [2022-07-22 11:20:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-22 11:20:15,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:15,133 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] [2022-07-22 11:20:15,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 11:20:15,133 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1051431597, now seen corresponding path program 1 times [2022-07-22 11:20:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:15,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731206281] [2022-07-22 11:20:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 11:20:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:15,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731206281] [2022-07-22 11:20:15,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731206281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:15,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:15,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:15,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810127782] [2022-07-22 11:20:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:15,299 INFO L87 Difference]: Start difference. First operand 2900 states and 4337 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) [2022-07-22 11:20:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:15,401 INFO L93 Difference]: Finished difference Result 6252 states and 9370 transitions. [2022-07-22 11:20:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:15,401 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 [2022-07-22 11:20:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:15,409 INFO L225 Difference]: With dead ends: 6252 [2022-07-22 11:20:15,409 INFO L226 Difference]: Without dead ends: 3375 [2022-07-22 11:20:15,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:15,415 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:15,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 378 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-07-22 11:20:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3375. [2022-07-22 11:20:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3375 states, 3374 states have (on average 1.4973325429756965) internal successors, (5052), 3374 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 5052 transitions. [2022-07-22 11:20:15,526 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 5052 transitions. Word has length 238 [2022-07-22 11:20:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:15,526 INFO L495 AbstractCegarLoop]: Abstraction has 3375 states and 5052 transitions. [2022-07-22 11:20:15,527 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) [2022-07-22 11:20:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 5052 transitions. [2022-07-22 11:20:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-22 11:20:15,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:15,534 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] [2022-07-22 11:20:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-22 11:20:15,534 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash 205602834, now seen corresponding path program 1 times [2022-07-22 11:20:15,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517539295] [2022-07-22 11:20:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-07-22 11:20:15,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:15,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517539295] [2022-07-22 11:20:15,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517539295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:15,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:15,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:15,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659985531] [2022-07-22 11:20:15,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:15,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:15,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:15,717 INFO L87 Difference]: Start difference. First operand 3375 states and 5052 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:15,841 INFO L93 Difference]: Finished difference Result 7196 states and 10791 transitions. [2022-07-22 11:20:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-07-22 11:20:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:15,850 INFO L225 Difference]: With dead ends: 7196 [2022-07-22 11:20:15,850 INFO L226 Difference]: Without dead ends: 3844 [2022-07-22 11:20:15,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:15,855 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:15,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 581 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-07-22 11:20:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3844. [2022-07-22 11:20:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3843 states have (on average 1.4967473328129066) internal successors, (5752), 3843 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5752 transitions. [2022-07-22 11:20:15,936 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5752 transitions. Word has length 270 [2022-07-22 11:20:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:15,936 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 5752 transitions. [2022-07-22 11:20:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5752 transitions. [2022-07-22 11:20:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-22 11:20:15,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:15,944 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] [2022-07-22 11:20:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-22 11:20:15,945 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 629249556, now seen corresponding path program 1 times [2022-07-22 11:20:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539873213] [2022-07-22 11:20:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-22 11:20:16,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539873213] [2022-07-22 11:20:16,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539873213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:16,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:16,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:16,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919191567] [2022-07-22 11:20:16,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:16,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:16,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:16,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:16,138 INFO L87 Difference]: Start difference. First operand 3844 states and 5752 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:16,251 INFO L93 Difference]: Finished difference Result 8107 states and 12151 transitions. [2022-07-22 11:20:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 270 [2022-07-22 11:20:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:16,262 INFO L225 Difference]: With dead ends: 8107 [2022-07-22 11:20:16,262 INFO L226 Difference]: Without dead ends: 4286 [2022-07-22 11:20:16,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:16,267 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:16,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 584 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-07-22 11:20:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 4286. [2022-07-22 11:20:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 1.4959159859976663) internal successors, (6410), 4285 states have internal predecessors, (6410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6410 transitions. [2022-07-22 11:20:16,387 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6410 transitions. Word has length 270 [2022-07-22 11:20:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:16,388 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 6410 transitions. [2022-07-22 11:20:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6410 transitions. [2022-07-22 11:20:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-22 11:20:16,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:16,398 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] [2022-07-22 11:20:16,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-22 11:20:16,398 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash 152506759, now seen corresponding path program 1 times [2022-07-22 11:20:16,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:16,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242288117] [2022-07-22 11:20:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-07-22 11:20:16,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:16,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242288117] [2022-07-22 11:20:16,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242288117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:16,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:16,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:16,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316097750] [2022-07-22 11:20:16,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:16,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:16,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:16,631 INFO L87 Difference]: Start difference. First operand 4286 states and 6410 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:16,770 INFO L93 Difference]: Finished difference Result 9024 states and 13516 transitions. [2022-07-22 11:20:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-07-22 11:20:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:16,781 INFO L225 Difference]: With dead ends: 9024 [2022-07-22 11:20:16,781 INFO L226 Difference]: Without dead ends: 4761 [2022-07-22 11:20:16,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:16,790 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:16,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 375 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2022-07-22 11:20:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4761. [2022-07-22 11:20:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4760 states have (on average 1.4974789915966387) internal successors, (7128), 4760 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 7128 transitions. [2022-07-22 11:20:16,891 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 7128 transitions. Word has length 345 [2022-07-22 11:20:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:16,892 INFO L495 AbstractCegarLoop]: Abstraction has 4761 states and 7128 transitions. [2022-07-22 11:20:16,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 7128 transitions. [2022-07-22 11:20:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-07-22 11:20:16,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:16,901 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] [2022-07-22 11:20:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-22 11:20:16,901 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1429551548, now seen corresponding path program 1 times [2022-07-22 11:20:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:16,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030186609] [2022-07-22 11:20:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:16,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2022-07-22 11:20:17,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:17,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030186609] [2022-07-22 11:20:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030186609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:17,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:17,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022482235] [2022-07-22 11:20:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:17,163 INFO L87 Difference]: Start difference. First operand 4761 states and 7128 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:17,283 INFO L93 Difference]: Finished difference Result 9974 states and 14952 transitions. [2022-07-22 11:20:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2022-07-22 11:20:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:17,295 INFO L225 Difference]: With dead ends: 9974 [2022-07-22 11:20:17,295 INFO L226 Difference]: Without dead ends: 5236 [2022-07-22 11:20:17,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:17,302 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:17,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 374 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-07-22 11:20:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 5236. [2022-07-22 11:20:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5235 states have (on average 1.4989493791786055) internal successors, (7847), 5235 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 7847 transitions. [2022-07-22 11:20:17,448 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 7847 transitions. Word has length 386 [2022-07-22 11:20:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:17,449 INFO L495 AbstractCegarLoop]: Abstraction has 5236 states and 7847 transitions. [2022-07-22 11:20:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 7847 transitions. [2022-07-22 11:20:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-07-22 11:20:17,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:17,458 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] [2022-07-22 11:20:17,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-22 11:20:17,458 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash -720784750, now seen corresponding path program 1 times [2022-07-22 11:20:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248543179] [2022-07-22 11:20:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2022-07-22 11:20:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248543179] [2022-07-22 11:20:17,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248543179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:17,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:17,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:17,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223701416] [2022-07-22 11:20:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:17,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:17,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:17,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:17,686 INFO L87 Difference]: Start difference. First operand 5236 states and 7847 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) [2022-07-22 11:20:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:17,835 INFO L93 Difference]: Finished difference Result 10919 states and 16383 transitions. [2022-07-22 11:20:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:17,836 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 393 [2022-07-22 11:20:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:17,847 INFO L225 Difference]: With dead ends: 10919 [2022-07-22 11:20:17,847 INFO L226 Difference]: Without dead ends: 5706 [2022-07-22 11:20:17,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:17,855 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 146 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:17,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 581 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2022-07-22 11:20:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 5706. [2022-07-22 11:20:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5706 states, 5705 states have (on average 1.4983347940403156) internal successors, (8548), 5705 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5706 states to 5706 states and 8548 transitions. [2022-07-22 11:20:17,991 INFO L78 Accepts]: Start accepts. Automaton has 5706 states and 8548 transitions. Word has length 393 [2022-07-22 11:20:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:17,994 INFO L495 AbstractCegarLoop]: Abstraction has 5706 states and 8548 transitions. [2022-07-22 11:20:17,994 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) [2022-07-22 11:20:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5706 states and 8548 transitions. [2022-07-22 11:20:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-07-22 11:20:18,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:18,008 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] [2022-07-22 11:20:18,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-22 11:20:18,009 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -397342583, now seen corresponding path program 1 times [2022-07-22 11:20:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:18,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245745356] [2022-07-22 11:20:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-07-22 11:20:18,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:18,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245745356] [2022-07-22 11:20:18,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245745356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:18,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:18,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:18,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283996993] [2022-07-22 11:20:18,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:18,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:18,275 INFO L87 Difference]: Start difference. First operand 5706 states and 8548 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:18,448 INFO L93 Difference]: Finished difference Result 11864 states and 17792 transitions. [2022-07-22 11:20:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 469 [2022-07-22 11:20:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:18,462 INFO L225 Difference]: With dead ends: 11864 [2022-07-22 11:20:18,462 INFO L226 Difference]: Without dead ends: 6181 [2022-07-22 11:20:18,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:18,469 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:18,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 372 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6181 states. [2022-07-22 11:20:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6181 to 6181. [2022-07-22 11:20:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 1.4998381877022653) internal successors, (9269), 6180 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 9269 transitions. [2022-07-22 11:20:18,600 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 9269 transitions. Word has length 469 [2022-07-22 11:20:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:18,601 INFO L495 AbstractCegarLoop]: Abstraction has 6181 states and 9269 transitions. [2022-07-22 11:20:18,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 9269 transitions. [2022-07-22 11:20:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-07-22 11:20:18,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:18,614 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] [2022-07-22 11:20:18,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-22 11:20:18,614 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1210425039, now seen corresponding path program 1 times [2022-07-22 11:20:18,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:18,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073436773] [2022-07-22 11:20:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-07-22 11:20:18,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:18,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073436773] [2022-07-22 11:20:18,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073436773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:18,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:18,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:20:18,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586313140] [2022-07-22 11:20:18,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:18,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:20:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:20:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:18,862 INFO L87 Difference]: Start difference. First operand 6181 states and 9269 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:19,040 INFO L93 Difference]: Finished difference Result 6658 states and 9993 transitions. [2022-07-22 11:20:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:20:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 511 [2022-07-22 11:20:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:19,052 INFO L225 Difference]: With dead ends: 6658 [2022-07-22 11:20:19,053 INFO L226 Difference]: Without dead ends: 6656 [2022-07-22 11:20:19,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:20:19,056 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:19,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 371 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:20:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2022-07-22 11:20:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 6656. [2022-07-22 11:20:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 1.5012772351615327) internal successors, (9991), 6655 states have internal predecessors, (9991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 9991 transitions. [2022-07-22 11:20:19,196 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 9991 transitions. Word has length 511 [2022-07-22 11:20:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:19,197 INFO L495 AbstractCegarLoop]: Abstraction has 6656 states and 9991 transitions. [2022-07-22 11:20:19,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 9991 transitions. [2022-07-22 11:20:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-22 11:20:19,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:19,214 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] [2022-07-22 11:20:19,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-22 11:20:19,214 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1317172119, now seen corresponding path program 1 times [2022-07-22 11:20:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908788600] [2022-07-22 11:20:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:19,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2022-07-22 11:20:19,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908788600] [2022-07-22 11:20:19,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908788600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:19,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:19,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:19,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731750839] [2022-07-22 11:20:19,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:19,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:19,488 INFO L87 Difference]: Start difference. First operand 6656 states and 9991 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:20,310 INFO L93 Difference]: Finished difference Result 14450 states and 21637 transitions. [2022-07-22 11:20:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 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 519 [2022-07-22 11:20:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:20,322 INFO L225 Difference]: With dead ends: 14450 [2022-07-22 11:20:20,322 INFO L226 Difference]: Without dead ends: 7817 [2022-07-22 11:20:20,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:20,331 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 71 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:20,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 681 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:20:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2022-07-22 11:20:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7230. [2022-07-22 11:20:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 1.5021441416516808) internal successors, (10859), 7229 states have internal predecessors, (10859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 10859 transitions. [2022-07-22 11:20:20,523 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 10859 transitions. Word has length 519 [2022-07-22 11:20:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:20,524 INFO L495 AbstractCegarLoop]: Abstraction has 7230 states and 10859 transitions. [2022-07-22 11:20:20,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 10859 transitions. [2022-07-22 11:20:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-22 11:20:20,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:20,536 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] [2022-07-22 11:20:20,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-22 11:20:20,536 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1566627227, now seen corresponding path program 1 times [2022-07-22 11:20:20,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:20,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695341051] [2022-07-22 11:20:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1268 proven. 24 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2022-07-22 11:20:21,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695341051] [2022-07-22 11:20:21,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695341051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695725262] [2022-07-22 11:20:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:21,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:21,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:21,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:20:21,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:20:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2391 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:20:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:22,192 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 [2022-07-22 11:20:22,217 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 [2022-07-22 11:20:22,223 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 [2022-07-22 11:20:22,246 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-07-22 11:20:22,246 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 24 treesize of output 33 [2022-07-22 11:20:22,336 INFO L356 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-07-22 11:20:22,337 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 45 [2022-07-22 11:20:22,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-22 11:20:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1264 proven. 0 refuted. 0 times theorem prover too weak. 1264 trivial. 0 not checked. [2022-07-22 11:20:22,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:20:22,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695725262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:22,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:20:22,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-07-22 11:20:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680115769] [2022-07-22 11:20:22,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:20:22,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:20:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:20:22,436 INFO L87 Difference]: Start difference. First operand 7230 states and 10859 transitions. Second operand has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:23,466 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 [] [2022-07-22 11:20:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:23,942 INFO L93 Difference]: Finished difference Result 15257 states and 22846 transitions. [2022-07-22 11:20:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:20:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 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 519 [2022-07-22 11:20:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:23,955 INFO L225 Difference]: With dead ends: 15257 [2022-07-22 11:20:23,955 INFO L226 Difference]: Without dead ends: 8050 [2022-07-22 11:20:23,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:20:23,967 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 41 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:23,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 977 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 145 Unchecked, 1.3s Time] [2022-07-22 11:20:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8050 states. [2022-07-22 11:20:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8050 to 7755. [2022-07-22 11:20:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7755 states, 7754 states have (on average 1.5018055197317512) internal successors, (11645), 7754 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7755 states to 7755 states and 11645 transitions. [2022-07-22 11:20:24,178 INFO L78 Accepts]: Start accepts. Automaton has 7755 states and 11645 transitions. Word has length 519 [2022-07-22 11:20:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:24,179 INFO L495 AbstractCegarLoop]: Abstraction has 7755 states and 11645 transitions. [2022-07-22 11:20:24,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7755 states and 11645 transitions. [2022-07-22 11:20:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-22 11:20:24,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:24,193 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:20:24,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:20:24,411 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,SelfDestructingSolverStorable46 [2022-07-22 11:20:24,412 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 733561204, now seen corresponding path program 1 times [2022-07-22 11:20:24,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:24,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838851707] [2022-07-22 11:20:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2530 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2022-07-22 11:20:24,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838851707] [2022-07-22 11:20:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838851707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:20:24,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:20:24,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:20:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737860870] [2022-07-22 11:20:24,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:20:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:20:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:20:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:20:24,736 INFO L87 Difference]: Start difference. First operand 7755 states and 11645 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:26,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:20:27,143 INFO L93 Difference]: Finished difference Result 16060 states and 24049 transitions. [2022-07-22 11:20:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:20:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 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 520 [2022-07-22 11:20:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:20:27,153 INFO L225 Difference]: With dead ends: 16060 [2022-07-22 11:20:27,153 INFO L226 Difference]: Without dead ends: 8328 [2022-07-22 11:20:27,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:20:27,162 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 69 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:20:27,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 679 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:20:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8328 states. [2022-07-22 11:20:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 7769. [2022-07-22 11:20:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7768 states have (on average 1.500901132852729) internal successors, (11659), 7768 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 11659 transitions. [2022-07-22 11:20:27,342 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 11659 transitions. Word has length 520 [2022-07-22 11:20:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:20:27,343 INFO L495 AbstractCegarLoop]: Abstraction has 7769 states and 11659 transitions. [2022-07-22 11:20:27,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 11659 transitions. [2022-07-22 11:20:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-07-22 11:20:27,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:20:27,355 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 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, 1, 1] [2022-07-22 11:20:27,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-22 11:20:27,356 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:20:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:20:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1703260270, now seen corresponding path program 1 times [2022-07-22 11:20:27,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:20:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231378624] [2022-07-22 11:20:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:27,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:20:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1268 proven. 24 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2022-07-22 11:20:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:20:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231378624] [2022-07-22 11:20:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231378624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:20:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987696024] [2022-07-22 11:20:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:20:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:20:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:20:27,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:20:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:20:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:20:28,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2400 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 11:20:28,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:20:28,970 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:20:28,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:20:29,007 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:20:29,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:20:29,028 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 [2022-07-22 11:20:29,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 11:20:29,077 INFO L356 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2022-07-22 11:20:29,078 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2022-07-22 11:20:29,100 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-22 11:20:29,100 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 64 [2022-07-22 11:20:29,121 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-07-22 11:20:29,121 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 32 [2022-07-22 11:20:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,175 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 [2022-07-22 11:20:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,181 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 [2022-07-22 11:20:29,190 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:20:29,191 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 45 treesize of output 44 [2022-07-22 11:20:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,753 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 44 treesize of output 37 [2022-07-22 11:20:29,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,760 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 40 treesize of output 33 [2022-07-22 11:20:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,766 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 0 case distinctions, treesize of input 32 treesize of output 25 [2022-07-22 11:20:29,813 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:20:29,814 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 [2022-07-22 11:20:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,820 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 23 treesize of output 22 [2022-07-22 11:20:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:29,827 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 25 treesize of output 24 [2022-07-22 11:20:29,838 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 [2022-07-22 11:20:29,842 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 27 treesize of output 15 [2022-07-22 11:20:29,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:20:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1260 proven. 163 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2022-07-22 11:20:29,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:20:30,460 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 608 treesize of output 494 [2022-07-22 11:20:35,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:20:35,057 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 22738 treesize of output 22126 [2022-07-22 11:20:35,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:20:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1266 proven. 2 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-07-22 11:20:35,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987696024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:20:35,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:20:35,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 28 [2022-07-22 11:20:35,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409686679] [2022-07-22 11:20:35,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:20:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 11:20:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:20:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 11:20:35,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-07-22 11:20:35,295 INFO L87 Difference]: Start difference. First operand 7769 states and 11659 transitions. Second operand has 28 states, 28 states have (on average 11.928571428571429) internal successors, (334), 28 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:20:38,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:40,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:42,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:44,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:20:47,052 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 [] [2022-07-22 11:21:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:00,818 INFO L93 Difference]: Finished difference Result 69413 states and 103365 transitions. [2022-07-22 11:21:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-22 11:21:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 11.928571428571429) internal successors, (334), 28 states have internal predecessors, (334), 0 states have call successors, (0), 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 522 [2022-07-22 11:21:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:00,907 INFO L225 Difference]: With dead ends: 69413 [2022-07-22 11:21:00,908 INFO L226 Difference]: Without dead ends: 61667 [2022-07-22 11:21:00,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1217 GetRequests, 1088 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5542 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2411, Invalid=14359, Unknown=0, NotChecked=0, Total=16770 [2022-07-22 11:21:00,930 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 3700 mSDsluCounter, 11211 mSDsCounter, 0 mSdLazyCounter, 10234 mSolverCounterSat, 724 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 12058 SdHoareTripleChecker+Invalid, 15277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 10234 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 4316 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:00,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 12058 Invalid, 15277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 10234 Invalid, 3 Unknown, 4316 Unchecked, 21.5s Time] [2022-07-22 11:21:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61667 states. [2022-07-22 11:21:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61667 to 39803. [2022-07-22 11:21:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39803 states, 39802 states have (on average 1.491231596402191) internal successors, (59354), 39802 states have internal predecessors, (59354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39803 states to 39803 states and 59354 transitions. [2022-07-22 11:21:01,930 INFO L78 Accepts]: Start accepts. Automaton has 39803 states and 59354 transitions. Word has length 522 [2022-07-22 11:21:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:01,930 INFO L495 AbstractCegarLoop]: Abstraction has 39803 states and 59354 transitions. [2022-07-22 11:21:01,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.928571428571429) internal successors, (334), 28 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39803 states and 59354 transitions. [2022-07-22 11:21:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-07-22 11:21:02,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:02,061 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 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, 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] [2022-07-22 11:21:02,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:21:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:02,288 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1332503124, now seen corresponding path program 1 times [2022-07-22 11:21:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:02,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635535120] [2022-07-22 11:21:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:02,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1225 proven. 187 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2022-07-22 11:21:02,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:02,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635535120] [2022-07-22 11:21:02,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635535120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:02,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281731143] [2022-07-22 11:21:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:02,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:02,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:02,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:21:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:03,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2472 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 11:21:03,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:03,733 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:03,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:21:03,764 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:21:03,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:21:03,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 11:21:03,792 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:03,792 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 [2022-07-22 11:21:03,818 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 19 treesize of output 7 [2022-07-22 11:21:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1226 proven. 176 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2022-07-22 11:21:03,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:21:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1231 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2022-07-22 11:21:03,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281731143] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:03,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:21:03,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-22 11:21:03,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896233469] [2022-07-22 11:21:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:03,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:03,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:21:03,869 INFO L87 Difference]: Start difference. First operand 39803 states and 59354 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:05,633 INFO L93 Difference]: Finished difference Result 82901 states and 123371 transitions. [2022-07-22 11:21:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 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 541 [2022-07-22 11:21:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:05,696 INFO L225 Difference]: With dead ends: 82901 [2022-07-22 11:21:05,696 INFO L226 Difference]: Without dead ends: 43121 [2022-07-22 11:21:05,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1081 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:21:05,728 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 136 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:05,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 437 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:21:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43121 states. [2022-07-22 11:21:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43121 to 39803. [2022-07-22 11:21:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39803 states, 39802 states have (on average 1.4693482739560826) internal successors, (58483), 39802 states have internal predecessors, (58483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39803 states to 39803 states and 58483 transitions. [2022-07-22 11:21:06,752 INFO L78 Accepts]: Start accepts. Automaton has 39803 states and 58483 transitions. Word has length 541 [2022-07-22 11:21:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:06,753 INFO L495 AbstractCegarLoop]: Abstraction has 39803 states and 58483 transitions. [2022-07-22 11:21:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 39803 states and 58483 transitions. [2022-07-22 11:21:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-07-22 11:21:06,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:06,795 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 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, 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] [2022-07-22 11:21:06,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 11:21:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-22 11:21:06,996 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 642086016, now seen corresponding path program 1 times [2022-07-22 11:21:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:06,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195343978] [2022-07-22 11:21:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:06,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1135 proven. 46 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2022-07-22 11:21:07,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195343978] [2022-07-22 11:21:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195343978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237282714] [2022-07-22 11:21:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:07,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:07,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:07,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:07,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:21:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:21:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:08,428 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:08,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:21:08,461 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:21:08,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:21:08,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-22 11:21:08,506 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:08,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:21:08,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:21:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1130 proven. 238 refuted. 0 times theorem prover too weak. 1438 trivial. 0 not checked. [2022-07-22 11:21:08,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:21:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1103 proven. 0 refuted. 0 times theorem prover too weak. 1703 trivial. 0 not checked. [2022-07-22 11:21:08,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237282714] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:08,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:21:08,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-22 11:21:08,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635171994] [2022-07-22 11:21:08,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:08,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:08,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:08,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:08,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:21:08,650 INFO L87 Difference]: Start difference. First operand 39803 states and 58483 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:10,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:11,783 INFO L93 Difference]: Finished difference Result 84213 states and 123527 transitions. [2022-07-22 11:21:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:11,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 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 541 [2022-07-22 11:21:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:11,942 INFO L225 Difference]: With dead ends: 84213 [2022-07-22 11:21:11,942 INFO L226 Difference]: Without dead ends: 44433 [2022-07-22 11:21:11,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1080 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:21:11,978 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 117 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:11,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 547 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:21:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44433 states. [2022-07-22 11:21:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44433 to 39831. [2022-07-22 11:21:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39831 states, 39830 states have (on average 1.4683153401958322) internal successors, (58483), 39830 states have internal predecessors, (58483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39831 states to 39831 states and 58483 transitions. [2022-07-22 11:21:12,972 INFO L78 Accepts]: Start accepts. Automaton has 39831 states and 58483 transitions. Word has length 541 [2022-07-22 11:21:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:12,972 INFO L495 AbstractCegarLoop]: Abstraction has 39831 states and 58483 transitions. [2022-07-22 11:21:12,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 39831 states and 58483 transitions. [2022-07-22 11:21:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-22 11:21:13,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:13,012 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 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, 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] [2022-07-22 11:21:13,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:21:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:13,227 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1547618676, now seen corresponding path program 1 times [2022-07-22 11:21:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96264538] [2022-07-22 11:21:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1244 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2022-07-22 11:21:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96264538] [2022-07-22 11:21:13,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96264538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:13,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:13,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755910032] [2022-07-22 11:21:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:13,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:13,628 INFO L87 Difference]: Start difference. First operand 39831 states and 58483 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:15,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:16,084 INFO L93 Difference]: Finished difference Result 82343 states and 120619 transitions. [2022-07-22 11:21:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:16,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 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 542 [2022-07-22 11:21:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:16,136 INFO L225 Difference]: With dead ends: 82343 [2022-07-22 11:21:16,136 INFO L226 Difference]: Without dead ends: 42535 [2022-07-22 11:21:16,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:21:16,163 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 82 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:16,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 669 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:21:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42535 states. [2022-07-22 11:21:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42535 to 39831. [2022-07-22 11:21:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39831 states, 39830 states have (on average 1.4663319106201356) internal successors, (58404), 39830 states have internal predecessors, (58404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39831 states to 39831 states and 58404 transitions. [2022-07-22 11:21:17,051 INFO L78 Accepts]: Start accepts. Automaton has 39831 states and 58404 transitions. Word has length 542 [2022-07-22 11:21:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:17,052 INFO L495 AbstractCegarLoop]: Abstraction has 39831 states and 58404 transitions. [2022-07-22 11:21:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39831 states and 58404 transitions. [2022-07-22 11:21:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-22 11:21:17,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:17,171 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 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] [2022-07-22 11:21:17,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-22 11:21:17,171 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1552783085, now seen corresponding path program 1 times [2022-07-22 11:21:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:17,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671587720] [2022-07-22 11:21:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:17,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1076 proven. 0 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2022-07-22 11:21:17,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:17,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671587720] [2022-07-22 11:21:17,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671587720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:17,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:17,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959732800] [2022-07-22 11:21:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:17,415 INFO L87 Difference]: Start difference. First operand 39831 states and 58404 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:19,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:20,172 INFO L93 Difference]: Finished difference Result 82859 states and 121283 transitions. [2022-07-22 11:21:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:20,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 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 542 [2022-07-22 11:21:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:20,229 INFO L225 Difference]: With dead ends: 82859 [2022-07-22 11:21:20,229 INFO L226 Difference]: Without dead ends: 43051 [2022-07-22 11:21:20,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:21:20,255 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 29 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:20,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 611 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:21:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43051 states. [2022-07-22 11:21:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43051 to 41875. [2022-07-22 11:21:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41875 states, 41874 states have (on average 1.4622916368152075) internal successors, (61232), 41874 states have internal predecessors, (61232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41875 states to 41875 states and 61232 transitions. [2022-07-22 11:21:21,357 INFO L78 Accepts]: Start accepts. Automaton has 41875 states and 61232 transitions. Word has length 542 [2022-07-22 11:21:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:21,358 INFO L495 AbstractCegarLoop]: Abstraction has 41875 states and 61232 transitions. [2022-07-22 11:21:21,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 41875 states and 61232 transitions. [2022-07-22 11:21:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-07-22 11:21:21,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:21,402 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:21:21,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-22 11:21:21,402 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:21,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1279426707, now seen corresponding path program 1 times [2022-07-22 11:21:21,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:21,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321074223] [2022-07-22 11:21:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:21,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 1096 proven. 0 refuted. 0 times theorem prover too weak. 1757 trivial. 0 not checked. [2022-07-22 11:21:21,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:21,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321074223] [2022-07-22 11:21:21,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321074223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:21:21,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:21:21,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:21:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034890230] [2022-07-22 11:21:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:21,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:21:21,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:21:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:21:21,642 INFO L87 Difference]: Start difference. First operand 41875 states and 61232 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:23,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:24,815 INFO L93 Difference]: Finished difference Result 85379 states and 124784 transitions. [2022-07-22 11:21:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:21:24,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 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 545 [2022-07-22 11:21:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:24,936 INFO L225 Difference]: With dead ends: 85379 [2022-07-22 11:21:24,936 INFO L226 Difference]: Without dead ends: 43527 [2022-07-22 11:21:24,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:21:24,957 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 43 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:24,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 626 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:21:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43527 states. [2022-07-22 11:21:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43527 to 41861. [2022-07-22 11:21:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41861 states, 41860 states have (on average 1.4607740086000955) internal successors, (61148), 41860 states have internal predecessors, (61148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41861 states to 41861 states and 61148 transitions. [2022-07-22 11:21:26,155 INFO L78 Accepts]: Start accepts. Automaton has 41861 states and 61148 transitions. Word has length 545 [2022-07-22 11:21:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:26,155 INFO L495 AbstractCegarLoop]: Abstraction has 41861 states and 61148 transitions. [2022-07-22 11:21:26,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 41861 states and 61148 transitions. [2022-07-22 11:21:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2022-07-22 11:21:26,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:26,197 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 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, 1] [2022-07-22 11:21:26,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-22 11:21:26,198 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash -666859260, now seen corresponding path program 1 times [2022-07-22 11:21:26,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:26,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230187603] [2022-07-22 11:21:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:26,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1392 proven. 338 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2022-07-22 11:21:27,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230187603] [2022-07-22 11:21:27,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230187603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089479081] [2022-07-22 11:21:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:27,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:27,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:27,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:27,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:21:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:28,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 11:21:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:28,672 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:21:28,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 11:21:28,693 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:28,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:21:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:28,779 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 23 treesize of output 22 [2022-07-22 11:21:28,806 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 [2022-07-22 11:21:28,809 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 [2022-07-22 11:21:28,839 INFO L356 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2022-07-22 11:21:28,839 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 [2022-07-22 11:21:28,937 INFO L356 Elim1Store]: treesize reduction 80, result has 35.0 percent of original size [2022-07-22 11:21:28,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 67 [2022-07-22 11:21:29,032 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:29,032 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 24 treesize of output 23 [2022-07-22 11:21:29,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-22 11:21:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1785 proven. 72 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2022-07-22 11:21:29,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:21:29,221 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 38 treesize of output 26 [2022-07-22 11:21:29,224 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 26 treesize of output 20 [2022-07-22 11:21:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1598 proven. 0 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2022-07-22 11:21:31,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089479081] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:31,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:21:31,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 9] total 23 [2022-07-22 11:21:31,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86125108] [2022-07-22 11:21:31,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:21:31,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:21:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:21:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:21:31,280 INFO L87 Difference]: Start difference. First operand 41861 states and 61148 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 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) [2022-07-22 11:21:32,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:21:34,760 INFO L93 Difference]: Finished difference Result 119017 states and 173674 transitions. [2022-07-22 11:21:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:21:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 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 548 [2022-07-22 11:21:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:21:34,858 INFO L225 Difference]: With dead ends: 119017 [2022-07-22 11:21:34,859 INFO L226 Difference]: Without dead ends: 77179 [2022-07-22 11:21:34,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:21:34,897 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 130 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:21:34,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 888 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 287 Invalid, 0 Unknown, 101 Unchecked, 2.1s Time] [2022-07-22 11:21:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77179 states. [2022-07-22 11:21:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77179 to 58957. [2022-07-22 11:21:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58957 states, 58956 states have (on average 1.4610557025578397) internal successors, (86138), 58956 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58957 states to 58957 states and 86138 transitions. [2022-07-22 11:21:36,513 INFO L78 Accepts]: Start accepts. Automaton has 58957 states and 86138 transitions. Word has length 548 [2022-07-22 11:21:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:21:36,514 INFO L495 AbstractCegarLoop]: Abstraction has 58957 states and 86138 transitions. [2022-07-22 11:21:36,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 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) [2022-07-22 11:21:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 58957 states and 86138 transitions. [2022-07-22 11:21:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2022-07-22 11:21:36,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:21:36,735 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:21:36,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:21:36,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:36,952 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:21:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:21:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1632805314, now seen corresponding path program 1 times [2022-07-22 11:21:36,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:21:36,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849358406] [2022-07-22 11:21:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:21:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1125 proven. 1526 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-22 11:21:38,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:21:38,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849358406] [2022-07-22 11:21:38,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849358406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:21:38,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990839418] [2022-07-22 11:21:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:21:38,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:21:38,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:21:38,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:21:38,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:21:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:21:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 2484 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 11:21:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:21:39,948 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:39,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:21:40,060 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-22 11:21:40,060 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 [2022-07-22 11:21:40,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-22 11:21:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,172 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 [2022-07-22 11:21:40,202 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-22 11:21:40,203 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 [2022-07-22 11:21:40,213 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:21:40,213 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 85 treesize of output 72 [2022-07-22 11:21:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,769 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 [2022-07-22 11:21:40,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,775 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 [2022-07-22 11:21:40,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,796 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-22 11:21:40,797 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 [2022-07-22 11:21:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,856 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 [2022-07-22 11:21:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,887 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-22 11:21:40,887 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 [2022-07-22 11:21:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:40,893 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 [2022-07-22 11:21:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:41,471 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-22 11:21:41,472 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 [2022-07-22 11:21:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:41,512 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-22 11:21:41,513 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 [2022-07-22 11:21:41,559 INFO L356 Elim1Store]: treesize reduction 53, result has 48.5 percent of original size [2022-07-22 11:21:41,560 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 42 treesize of output 75 [2022-07-22 11:21:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,083 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 234 treesize of output 198 [2022-07-22 11:21:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:42,122 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 234 treesize of output 198 [2022-07-22 11:21:42,164 INFO L356 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2022-07-22 11:21:42,164 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 234 treesize of output 271 [2022-07-22 11:21:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,455 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 229 treesize of output 189 [2022-07-22 11:21:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,462 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 229 treesize of output 189 [2022-07-22 11:21:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,483 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-22 11:21:44,484 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 229 treesize of output 241 [2022-07-22 11:21:44,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,709 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 163 treesize of output 109 [2022-07-22 11:21:44,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,718 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 117 treesize of output 69 [2022-07-22 11:21:44,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:21:44,745 INFO L356 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2022-07-22 11:21:44,746 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 4 case distinctions, treesize of input 63 treesize of output 59 [2022-07-22 11:21:44,819 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-22 11:21:44,819 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 [2022-07-22 11:21:44,908 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:21:44,908 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 [2022-07-22 11:21:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1194 proven. 496 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-07-22 11:21:44,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:21:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:53,275 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 824 treesize of output 662 [2022-07-22 11:21:53,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:53,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 11:21:53,283 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 1094 treesize of output 938 [2022-07-22 11:21:53,623 INFO L356 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2022-07-22 11:21:53,623 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 1524 treesize of output 1 [2022-07-22 11:21:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1341 proven. 141 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2022-07-22 11:21:53,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990839418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:21:53,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:21:53,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 14] total 49 [2022-07-22 11:21:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601478616] [2022-07-22 11:21:53,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:21:53,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 11:21:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:21:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 11:21:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2083, Unknown=1, NotChecked=0, Total=2352 [2022-07-22 11:21:53,638 INFO L87 Difference]: Start difference. First operand 58957 states and 86138 transitions. Second operand has 49 states, 49 states have (on average 16.346938775510203) internal successors, (801), 49 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:21:56,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:57,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:21:59,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:22:01,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:22:02,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:22:04,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []