./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep10-2.i --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/reducercommutativity/sep10-2.i -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 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:41:15,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:41:15,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:41:15,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:41:15,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:41:15,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:41:15,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:41:15,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:41:15,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:41:15,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:41:15,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:41:15,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:41:15,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:41:15,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:41:15,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:41:15,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:41:15,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:41:15,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:41:15,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:41:15,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:41:15,510 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:41:15,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:41:15,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:41:15,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:41:15,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:41:15,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:41:15,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:41:15,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:41:15,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:41:15,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:41:15,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:41:15,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:41:15,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:41:15,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:41:15,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:41:15,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:41:15,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:41:15,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:41:15,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:41:15,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:41:15,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:41:15,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:41:15,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:41:15,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:41:15,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:41:15,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:41:15,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:41:15,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:41:15,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:41:15,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:41:15,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:41:15,565 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:41:15,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:41:15,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:41:15,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:41:15,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:41:15,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:41:15,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:41:15,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:41:15,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:41:15,568 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:41:15,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:41:15,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:41:15,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:41:15,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:41:15,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:41:15,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:41:15,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:41:15,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:41:15,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:41:15,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:41:15,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:41:15,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:41:15,571 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:41:15,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:41:15,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:41:15,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 [2022-07-22 09:41:15,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:41:15,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:41:15,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:41:15,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:41:15,861 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:41:15,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-07-22 09:41:15,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697d7698b/20e52b0ee9f6484caeecd15339b091a0/FLAG2dc9c87a0 [2022-07-22 09:41:16,349 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:41:16,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-07-22 09:41:16,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697d7698b/20e52b0ee9f6484caeecd15339b091a0/FLAG2dc9c87a0 [2022-07-22 09:41:16,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697d7698b/20e52b0ee9f6484caeecd15339b091a0 [2022-07-22 09:41:16,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:41:16,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:41:16,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:41:16,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:41:16,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:41:16,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17960c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16, skipping insertion in model container [2022-07-22 09:41:16,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:41:16,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:41:16,615 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/reducercommutativity/sep10-2.i[1293,1306] [2022-07-22 09:41:16,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:41:16,626 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:41:16,658 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/reducercommutativity/sep10-2.i[1293,1306] [2022-07-22 09:41:16,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:41:16,671 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:41:16,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16 WrapperNode [2022-07-22 09:41:16,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:41:16,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:41:16,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:41:16,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:41:16,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,712 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-22 09:41:16,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:41:16,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:41:16,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:41:16,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:41:16,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:41:16,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:41:16,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:41:16,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:41:16,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (1/1) ... [2022-07-22 09:41:16,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:41:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:16,780 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 09:41:16,782 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 09:41:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:41:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:41:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:41:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:41:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:41:16,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:41:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:41:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:41:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-22 09:41:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-22 09:41:16,913 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:41:16,914 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:41:17,097 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:41:17,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:41:17,103 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:41:17,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:17 BoogieIcfgContainer [2022-07-22 09:41:17,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:41:17,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:41:17,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:41:17,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:41:17,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:41:16" (1/3) ... [2022-07-22 09:41:17,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62416d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:17, skipping insertion in model container [2022-07-22 09:41:17,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:16" (2/3) ... [2022-07-22 09:41:17,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62416d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:17, skipping insertion in model container [2022-07-22 09:41:17,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:17" (3/3) ... [2022-07-22 09:41:17,118 INFO L111 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2022-07-22 09:41:17,132 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:41:17,132 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:41:17,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:41:17,193 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@456e13b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fc7b85d [2022-07-22 09:41:17,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:41:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:41:17,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:17,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:17,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-22 09:41:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:17,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868511972] [2022-07-22 09:41:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:17,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:41:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:41:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868511972] [2022-07-22 09:41:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868511972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:17,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:41:17,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:41:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522278400] [2022-07-22 09:41:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:41:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:41:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:41:17,512 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:41:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:17,545 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-22 09:41:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:41:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 09:41:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:17,553 INFO L225 Difference]: With dead ends: 52 [2022-07-22 09:41:17,554 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 09:41:17,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 09:41:17,560 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:17,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 09:41:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-22 09:41:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-22 09:41:17,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-22 09:41:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:17,586 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-22 09:41:17,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:41:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-22 09:41:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:41:17,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:17,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:17,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:41:17,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-22 09:41:17,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:17,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060654350] [2022-07-22 09:41:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:41:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 09:41:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:41:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:17,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:17,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060654350] [2022-07-22 09:41:17,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060654350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603090813] [2022-07-22 09:41:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:17,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:17,689 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 09:41:17,691 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 09:41:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:41:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 09:41:17,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:41:17,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603090813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:17,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:41:17,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 09:41:17,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640974364] [2022-07-22 09:41:17,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:17,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:41:17,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:17,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:41:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:41:17,791 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:17,801 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-22 09:41:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:41:17,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-22 09:41:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:17,803 INFO L225 Difference]: With dead ends: 45 [2022-07-22 09:41:17,803 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 09:41:17,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:41:17,805 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:17,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 09:41:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-22 09:41:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-22 09:41:17,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-22 09:41:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:17,811 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-22 09:41:17,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-22 09:41:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 09:41:17,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:17,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:17,840 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 09:41:18,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:18,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-22 09:41:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:18,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399456032] [2022-07-22 09:41:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:18,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:41:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 09:41:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:41:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 09:41:18,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399456032] [2022-07-22 09:41:18,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399456032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45641437] [2022-07-22 09:41:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:18,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:18,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:18,189 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 09:41:18,191 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 09:41:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:41:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 09:41:18,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:41:18,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45641437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:18,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:41:18,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 09:41:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132294499] [2022-07-22 09:41:18,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:41:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:41:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:41:18,306 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:18,321 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-22 09:41:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:41:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-22 09:41:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:18,323 INFO L225 Difference]: With dead ends: 41 [2022-07-22 09:41:18,323 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 09:41:18,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:41:18,325 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:18,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 09:41:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-22 09:41:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-22 09:41:18,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-22 09:41:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:18,333 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-22 09:41:18,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-22 09:41:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 09:41:18,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:18,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:18,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 09:41:18,539 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,SelfDestructingSolverStorable2 [2022-07-22 09:41:18,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-22 09:41:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714090504] [2022-07-22 09:41:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:41:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 09:41:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 09:41:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:18,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:18,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714090504] [2022-07-22 09:41:18,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714090504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:18,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295810302] [2022-07-22 09:41:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:18,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:18,643 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 09:41:18,644 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 09:41:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:41:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:41:18,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:41:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295810302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:18,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:18,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-22 09:41:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353658185] [2022-07-22 09:41:18,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:18,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 09:41:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 09:41:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:41:18,831 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:41:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:18,877 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-22 09:41:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 09:41:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-22 09:41:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:18,879 INFO L225 Difference]: With dead ends: 58 [2022-07-22 09:41:18,879 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 09:41:18,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:41:18,881 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:18,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 09:41:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-22 09:41:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-22 09:41:18,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-22 09:41:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:18,888 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-22 09:41:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:41:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-22 09:41:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 09:41:18,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:18,890 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:18,914 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 09:41:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:19,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-22 09:41:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562855229] [2022-07-22 09:41:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:19,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 09:41:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 09:41:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:41:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 09:41:19,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:19,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562855229] [2022-07-22 09:41:19,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562855229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:19,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694767718] [2022-07-22 09:41:19,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:41:19,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:19,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:19,225 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 09:41:19,250 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 09:41:19,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:41:19,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:19,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:41:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-22 09:41:19,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-22 09:41:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694767718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:19,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:19,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-22 09:41:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238959717] [2022-07-22 09:41:19,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:19,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:41:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:41:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:41:19,462 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:41:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:19,533 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-07-22 09:41:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:41:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-07-22 09:41:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:19,536 INFO L225 Difference]: With dead ends: 74 [2022-07-22 09:41:19,537 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 09:41:19,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:41:19,542 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:19,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 09:41:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-22 09:41:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-22 09:41:19,551 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-07-22 09:41:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:19,552 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-22 09:41:19,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:41:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-22 09:41:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 09:41:19,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:19,554 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:19,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:19,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:19,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-07-22 09:41:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767482070] [2022-07-22 09:41:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:19,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 09:41:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:41:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 09:41:19,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:19,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767482070] [2022-07-22 09:41:19,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767482070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:19,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302566091] [2022-07-22 09:41:19,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:41:19,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:19,948 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 09:41:19,949 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 09:41:20,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:41:20,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:20,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:41:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 09:41:20,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 09:41:20,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302566091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:20,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:20,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-22 09:41:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574774310] [2022-07-22 09:41:20,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 09:41:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 09:41:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:41:20,081 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:20,102 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-07-22 09:41:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 09:41:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-22 09:41:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:20,104 INFO L225 Difference]: With dead ends: 86 [2022-07-22 09:41:20,104 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 09:41:20,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:41:20,105 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:20,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 09:41:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-22 09:41:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-22 09:41:20,113 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 70 [2022-07-22 09:41:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-22 09:41:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-22 09:41:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 09:41:20,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:20,118 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:20,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 09:41:20,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:20,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash -189786485, now seen corresponding path program 4 times [2022-07-22 09:41:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452814752] [2022-07-22 09:41:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:20,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:20,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 09:41:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:20,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 09:41:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-22 09:41:20,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452814752] [2022-07-22 09:41:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452814752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738981883] [2022-07-22 09:41:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:41:20,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:20,539 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 09:41:20,559 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 09:41:20,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:41:20,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:41:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-22 09:41:20,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-22 09:41:20,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738981883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:20,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:20,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-22 09:41:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77241328] [2022-07-22 09:41:20,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:20,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:41:20,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:41:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:41:20,759 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:41:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:20,789 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2022-07-22 09:41:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:41:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 106 [2022-07-22 09:41:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:20,791 INFO L225 Difference]: With dead ends: 110 [2022-07-22 09:41:20,791 INFO L226 Difference]: Without dead ends: 73 [2022-07-22 09:41:20,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:41:20,793 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:20,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-22 09:41:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-22 09:41:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-07-22 09:41:20,801 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 106 [2022-07-22 09:41:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:20,801 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-07-22 09:41:20,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:41:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-07-22 09:41:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 09:41:20,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:20,804 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:20,826 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 09:41:21,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:21,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1263048203, now seen corresponding path program 5 times [2022-07-22 09:41:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540425516] [2022-07-22 09:41:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 09:41:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 09:41:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-22 09:41:21,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540425516] [2022-07-22 09:41:21,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540425516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067542378] [2022-07-22 09:41:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:41:21,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:21,185 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 09:41:21,186 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 09:41:21,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-22 09:41:21,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:41:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 650 proven. 4 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-07-22 09:41:21,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-22 09:41:21,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067542378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:21,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:21,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-22 09:41:21,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40034562] [2022-07-22 09:41:21,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:21,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 09:41:21,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 09:41:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:41:21,684 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:21,707 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2022-07-22 09:41:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 09:41:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-07-22 09:41:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:21,709 INFO L225 Difference]: With dead ends: 122 [2022-07-22 09:41:21,709 INFO L226 Difference]: Without dead ends: 81 [2022-07-22 09:41:21,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:41:21,710 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:21,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-22 09:41:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-22 09:41:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-07-22 09:41:21,718 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 142 [2022-07-22 09:41:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:21,718 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-07-22 09:41:21,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-07-22 09:41:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 09:41:21,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:21,721 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:21,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:21,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:21,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash -660788349, now seen corresponding path program 6 times [2022-07-22 09:41:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:21,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199737469] [2022-07-22 09:41:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 09:41:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 09:41:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-22 09:41:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199737469] [2022-07-22 09:41:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199737469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600450204] [2022-07-22 09:41:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:41:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:22,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:41:22,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-22 09:41:22,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:22,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:41:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-07-22 09:41:22,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-22 09:41:22,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600450204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:22,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:22,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-22 09:41:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513433212] [2022-07-22 09:41:22,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:41:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:41:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:41:22,644 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:22,672 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-07-22 09:41:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 09:41:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2022-07-22 09:41:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:22,675 INFO L225 Difference]: With dead ends: 128 [2022-07-22 09:41:22,675 INFO L226 Difference]: Without dead ends: 87 [2022-07-22 09:41:22,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:41:22,676 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:22,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-22 09:41:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-22 09:41:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2022-07-22 09:41:22,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 150 [2022-07-22 09:41:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:22,684 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2022-07-22 09:41:22,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2022-07-22 09:41:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:41:22,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:22,686 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:22,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 09:41:22,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:22,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:22,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1766594339, now seen corresponding path program 7 times [2022-07-22 09:41:22,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:22,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065930993] [2022-07-22 09:41:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:22,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 09:41:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-22 09:41:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-07-22 09:41:24,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:24,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065930993] [2022-07-22 09:41:24,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065930993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:24,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636746759] [2022-07-22 09:41:24,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:41:24,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:24,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:24,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:41:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 09:41:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-07-22 09:41:25,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-22 09:41:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636746759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:26,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:26,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 38 [2022-07-22 09:41:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733892142] [2022-07-22 09:41:26,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:26,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:41:26,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:41:26,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:41:26,088 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 09:41:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:26,736 INFO L93 Difference]: Finished difference Result 293 states and 410 transitions. [2022-07-22 09:41:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:41:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 156 [2022-07-22 09:41:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:26,743 INFO L225 Difference]: With dead ends: 293 [2022-07-22 09:41:26,743 INFO L226 Difference]: Without dead ends: 289 [2022-07-22 09:41:26,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 309 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:41:26,745 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 65 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:26,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 3257 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:41:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-22 09:41:26,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 229. [2022-07-22 09:41:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 222 states have internal predecessors, (281), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 09:41:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2022-07-22 09:41:26,796 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 156 [2022-07-22 09:41:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:26,797 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2022-07-22 09:41:26,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 09:41:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2022-07-22 09:41:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:41:26,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:26,799 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:26,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 09:41:27,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1086535969, now seen corresponding path program 1 times [2022-07-22 09:41:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:27,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817093397] [2022-07-22 09:41:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 09:41:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-22 09:41:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 648 proven. 621 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-07-22 09:41:28,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817093397] [2022-07-22 09:41:28,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817093397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337329256] [2022-07-22 09:41:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:28,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:28,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:28,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:41:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-22 09:41:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:28,876 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 23 treesize of output 11 [2022-07-22 09:41:28,943 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 17 treesize of output 13 [2022-07-22 09:41:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2022-07-22 09:41:29,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:31,038 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-22 09:41:31,038 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 34 treesize of output 29 [2022-07-22 09:41:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 676 proven. 460 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-22 09:41:31,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337329256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:31,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:31,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 20] total 62 [2022-07-22 09:41:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515638492] [2022-07-22 09:41:31,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 09:41:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 09:41:31,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3557, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 09:41:31,101 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 09:41:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:33,481 INFO L93 Difference]: Finished difference Result 526 states and 716 transitions. [2022-07-22 09:41:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 09:41:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 156 [2022-07-22 09:41:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:33,484 INFO L225 Difference]: With dead ends: 526 [2022-07-22 09:41:33,484 INFO L226 Difference]: Without dead ends: 474 [2022-07-22 09:41:33,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 319 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=560, Invalid=7996, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 09:41:33,488 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 239 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 864 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:33,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1446 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1959 Invalid, 0 Unknown, 864 Unchecked, 1.1s Time] [2022-07-22 09:41:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-22 09:41:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 443. [2022-07-22 09:41:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 430 states have (on average 1.3093023255813954) internal successors, (563), 434 states have internal predecessors, (563), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-07-22 09:41:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 598 transitions. [2022-07-22 09:41:33,531 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 598 transitions. Word has length 156 [2022-07-22 09:41:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:33,531 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 598 transitions. [2022-07-22 09:41:33,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-22 09:41:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 598 transitions. [2022-07-22 09:41:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:41:33,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:33,535 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:33,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 09:41:33,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1508428901, now seen corresponding path program 2 times [2022-07-22 09:41:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408264143] [2022-07-22 09:41:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:35,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 09:41:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:35,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-22 09:41:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1092 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-22 09:41:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408264143] [2022-07-22 09:41:35,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408264143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923412388] [2022-07-22 09:41:35,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:41:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:35,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:35,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:41:35,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:41:35,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-22 09:41:35,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-22 09:41:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,473 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 35 treesize of output 28 [2022-07-22 09:41:36,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,511 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 35 treesize of output 28 [2022-07-22 09:41:36,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,548 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 35 treesize of output 28 [2022-07-22 09:41:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,587 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 35 treesize of output 28 [2022-07-22 09:41:36,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,630 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 35 treesize of output 28 [2022-07-22 09:41:36,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,682 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 35 treesize of output 28 [2022-07-22 09:41:36,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,722 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 35 treesize of output 28 [2022-07-22 09:41:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,761 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 35 treesize of output 28 [2022-07-22 09:41:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,825 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 39 treesize of output 26 [2022-07-22 09:41:36,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:41:36,905 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:41:36,905 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 1 case distinctions, treesize of input 48 treesize of output 29 [2022-07-22 09:41:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 27 proven. 1416 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-22 09:41:37,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:42:02,966 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-22 09:42:02,966 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 38 treesize of output 31 [2022-07-22 09:42:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 367 proven. 974 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-22 09:42:03,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923412388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:42:03,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:42:03,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 49, 44] total 96 [2022-07-22 09:42:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312870645] [2022-07-22 09:42:03,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:42:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-22 09:42:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:42:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-22 09:42:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=8682, Unknown=30, NotChecked=0, Total=9120 [2022-07-22 09:42:03,626 INFO L87 Difference]: Start difference. First operand 443 states and 598 transitions. Second operand has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 09:42:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:06,904 INFO L93 Difference]: Finished difference Result 1180 states and 1633 transitions. [2022-07-22 09:42:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-22 09:42:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 156 [2022-07-22 09:42:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:06,913 INFO L225 Difference]: With dead ends: 1180 [2022-07-22 09:42:06,914 INFO L226 Difference]: Without dead ends: 1089 [2022-07-22 09:42:06,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 275 SyntacticMatches, 22 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4636 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=791, Invalid=14929, Unknown=30, NotChecked=0, Total=15750 [2022-07-22 09:42:06,920 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 159 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 5257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2419 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:06,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 3406 Invalid, 5257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2793 Invalid, 0 Unknown, 2419 Unchecked, 1.5s Time] [2022-07-22 09:42:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-22 09:42:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1038. [2022-07-22 09:42:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1011 states have (on average 1.3194856577645895) internal successors, (1334), 1021 states have internal predecessors, (1334), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (93), 11 states have call predecessors, (93), 11 states have call successors, (93) [2022-07-22 09:42:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1438 transitions. [2022-07-22 09:42:07,029 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1438 transitions. Word has length 156 [2022-07-22 09:42:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:07,029 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1438 transitions. [2022-07-22 09:42:07,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 09:42:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1438 transitions. [2022-07-22 09:42:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:42:07,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:07,037 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:07,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:07,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 09:42:07,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1248509279, now seen corresponding path program 3 times [2022-07-22 09:42:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:07,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861009273] [2022-07-22 09:42:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:42:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:08,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 09:42:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-22 09:42:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1094 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-22 09:42:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861009273] [2022-07-22 09:42:09,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861009273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983362238] [2022-07-22 09:42:09,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:42:09,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:09,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:09,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:42:09,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-22 09:42:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:42:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 09:42:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:42:10,447 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:42:10,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:42:10,502 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:42:10,502 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 39 treesize of output 32 [2022-07-22 09:42:10,557 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:42:10,557 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 39 treesize of output 32 [2022-07-22 09:42:10,611 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:42:10,611 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 39 treesize of output 32 [2022-07-22 09:42:10,668 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:42:10,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:42:10,684 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:42:10,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-07-22 09:42:10,811 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:42:10,811 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 09:42:10,934 INFO L356 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-07-22 09:42:10,934 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 61 treesize of output 63 [2022-07-22 09:42:11,135 INFO L356 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2022-07-22 09:42:11,135 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 79 treesize of output 83 [2022-07-22 09:42:11,389 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:42:11,390 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 35 treesize of output 28 [2022-07-22 09:42:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 856 proven. 346 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-07-22 09:42:39,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:42:44,377 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((v_ArrVal_758 Int)) (<= 0 (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* 2 (div (* (- 1) .cse0) 2)))))))) is different from false [2022-07-22 09:43:06,121 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_86| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int) (v_ArrVal_758 Int) (v_ArrVal_756 Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |v_ULTIMATE.start_main_~i~2#1_86| 1))) (<= 0 (let ((.cse0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_86| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_756) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ (* 2 (div (* (- 1) .cse0) 2)) .cse0))))) (not (<= |v_ULTIMATE.start_main_~i~2#1_86| (+ |c_ULTIMATE.start_main_~i~2#1| 1))))) is different from false [2022-07-22 09:44:05,954 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_87| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_87| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int) (|v_ULTIMATE.start_main_~i~2#1_86| Int) (v_ArrVal_758 Int) (v_ArrVal_756 Int) (v_ArrVal_754 Int)) (or (<= 0 (let ((.cse0 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_87| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_754) (+ (* |v_ULTIMATE.start_main_~i~2#1_86| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_756) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ (* (div (* (- 1) .cse0) 2) 2) .cse0))) (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |v_ULTIMATE.start_main_~i~2#1_86| 1))) (not (<= |v_ULTIMATE.start_main_~i~2#1_86| (+ |v_ULTIMATE.start_main_~i~2#1_87| 1))))))) is different from false [2022-07-22 09:45:39,882 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_88| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~2#1_87| Int) (v_ArrVal_751 Int) (|v_ULTIMATE.start_main_~i~2#1_85| Int) (|v_ULTIMATE.start_main_~i~2#1_86| Int) (v_ArrVal_758 Int) (v_ArrVal_756 Int) (v_ArrVal_754 Int)) (or (<= 0 (let ((.cse0 (select (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_88| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_751) (+ (* |v_ULTIMATE.start_main_~i~2#1_87| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_754) (+ (* |v_ULTIMATE.start_main_~i~2#1_86| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_756) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ (* (div (* (- 1) .cse0) 2) 2) .cse0))) (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |v_ULTIMATE.start_main_~i~2#1_86| 1))) (not (<= |v_ULTIMATE.start_main_~i~2#1_87| (+ |v_ULTIMATE.start_main_~i~2#1_88| 1))) (not (<= |v_ULTIMATE.start_main_~i~2#1_86| (+ |v_ULTIMATE.start_main_~i~2#1_87| 1))))) (not (<= |v_ULTIMATE.start_main_~i~2#1_88| (+ |c_ULTIMATE.start_main_~i~2#1| 1))))) is different from false