./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_04.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_04.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 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 09:49:46,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 09:49:46,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 09:49:46,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 09:49:46,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 09:49:46,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 09:49:46,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 09:49:46,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 09:49:46,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 09:49:46,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 09:49:46,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 09:49:46,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 09:49:46,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 09:49:46,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 09:49:46,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 09:49:46,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 09:49:46,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 09:49:46,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 09:49:46,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 09:49:46,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 09:49:46,632 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 09:49:46,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 09:49:46,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 09:49:46,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 09:49:46,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 09:49:46,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 09:49:46,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 09:49:46,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 09:49:46,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 09:49:46,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 09:49:46,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 09:49:46,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 09:49:46,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 09:49:46,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 09:49:46,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 09:49:46,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 09:49:46,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 09:49:46,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 09:49:46,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 09:49:46,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 09:49:46,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 09:49:46,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 09:49:46,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 09:49:46,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 09:49:46,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 09:49:46,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 09:49:46,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 09:49:46,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 09:49:46,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 09:49:46,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 09:49:46,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 09:49:46,690 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 09:49:46,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 09:49:46,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 09:49:46,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 09:49:46,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 09:49:46,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 09:49:46,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 09:49:46,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 09:49:46,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 09:49:46,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 09:49:46,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:49:46,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 09:49:46,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 09:49:46,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 09:49:46,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 09:49:46,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 09:49:46,695 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 09:49:46,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 09:49:46,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 09:49:46,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d [2022-07-13 09:49:46,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 09:49:46,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 09:49:46,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 09:49:46,933 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 09:49:46,934 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 09:49:46,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_04.i [2022-07-13 09:49:46,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f454c72/d9b5be45677a46fb9d8400fa40ad7a93/FLAGe927f3b83 [2022-07-13 09:49:47,330 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 09:49:47,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_04.i [2022-07-13 09:49:47,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f454c72/d9b5be45677a46fb9d8400fa40ad7a93/FLAGe927f3b83 [2022-07-13 09:49:47,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f454c72/d9b5be45677a46fb9d8400fa40ad7a93 [2022-07-13 09:49:47,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 09:49:47,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 09:49:47,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 09:49:47,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 09:49:47,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 09:49:47,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695c2dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47, skipping insertion in model container [2022-07-13 09:49:47,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 09:49:47,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 09:49:47,488 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/array-examples/standard_two_index_04.i[814,827] [2022-07-13 09:49:47,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:49:47,505 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 09:49:47,512 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/array-examples/standard_two_index_04.i[814,827] [2022-07-13 09:49:47,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:49:47,525 INFO L208 MainTranslator]: Completed translation [2022-07-13 09:49:47,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47 WrapperNode [2022-07-13 09:49:47,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 09:49:47,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 09:49:47,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 09:49:47,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 09:49:47,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,551 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-13 09:49:47,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 09:49:47,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 09:49:47,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 09:49:47,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 09:49:47,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 09:49:47,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 09:49:47,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 09:49:47,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 09:49:47,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (1/1) ... [2022-07-13 09:49:47,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:49:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:47,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 09:49:47,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 09:49:47,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 09:49:47,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 09:49:47,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 09:49:47,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 09:49:47,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 09:49:47,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 09:49:47,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 09:49:47,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 09:49:47,700 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 09:49:47,702 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 09:49:47,840 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 09:49:47,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 09:49:47,844 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 09:49:47,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:49:47 BoogieIcfgContainer [2022-07-13 09:49:47,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 09:49:47,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 09:49:47,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 09:49:47,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 09:49:47,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:49:47" (1/3) ... [2022-07-13 09:49:47,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a67a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:49:47, skipping insertion in model container [2022-07-13 09:49:47,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:49:47" (2/3) ... [2022-07-13 09:49:47,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a67a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:49:47, skipping insertion in model container [2022-07-13 09:49:47,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:49:47" (3/3) ... [2022-07-13 09:49:47,859 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2022-07-13 09:49:47,868 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 09:49:47,869 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 09:49:47,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 09:49:47,932 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@5f67ee05, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3c1b5d5c [2022-07-13 09:49:47,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 09:49:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 09:49:47,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:47,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:47,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2022-07-13 09:49:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328765118] [2022-07-13 09:49:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:49:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:48,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328765118] [2022-07-13 09:49:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328765118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:49:48,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:49:48,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 09:49:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545935441] [2022-07-13 09:49:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:49:48,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:49:48,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:48,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:49:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:49:48,119 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:48,153 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-07-13 09:49:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:49:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 09:49:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:48,160 INFO L225 Difference]: With dead ends: 28 [2022-07-13 09:49:48,160 INFO L226 Difference]: Without dead ends: 12 [2022-07-13 09:49:48,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:49:48,168 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:48,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:49:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-13 09:49:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-13 09:49:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-13 09:49:48,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-07-13 09:49:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:48,191 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-13 09:49:48,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-13 09:49:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 09:49:48,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:48,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:48,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 09:49:48,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2022-07-13 09:49:48,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:48,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83766292] [2022-07-13 09:49:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:49:48,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:48,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83766292] [2022-07-13 09:49:48,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83766292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:48,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296736517] [2022-07-13 09:49:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:48,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:49:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 09:49:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 09:49:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:49:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:49:48,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:49:48,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296736517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:49:48,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:49:48,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-13 09:49:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261709073] [2022-07-13 09:49:48,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:49:48,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:49:48,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:49:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:49:48,322 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:48,363 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-13 09:49:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:49:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 09:49:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:48,364 INFO L225 Difference]: With dead ends: 24 [2022-07-13 09:49:48,364 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 09:49:48,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:49:48,365 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:48,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:49:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 09:49:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-07-13 09:49:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-13 09:49:48,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-07-13 09:49:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:48,369 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-13 09:49:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-13 09:49:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 09:49:48,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:48,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:48,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 09:49:48,577 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 [2022-07-13 09:49:48,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2022-07-13 09:49:48,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:48,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973503216] [2022-07-13 09:49:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:49:48,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973503216] [2022-07-13 09:49:48,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973503216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136143541] [2022-07-13 09:49:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:48,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:48,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:48,620 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) [2022-07-13 09:49:48,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 09:49:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 09:49:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:49:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:49:48,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:49:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:49:48,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136143541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:49:48,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:49:48,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 09:49:48,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033854962] [2022-07-13 09:49:48,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:49:48,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 09:49:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 09:49:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:49:48,733 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:48,764 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-07-13 09:49:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:49:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 09:49:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:48,765 INFO L225 Difference]: With dead ends: 36 [2022-07-13 09:49:48,765 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 09:49:48,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:49:48,767 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:48,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:49:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 09:49:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-07-13 09:49:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-13 09:49:48,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-07-13 09:49:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:48,771 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-13 09:49:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-13 09:49:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 09:49:48,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:48,772 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:48,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 09:49:48,983 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 [2022-07-13 09:49:48,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:48,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:48,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2022-07-13 09:49:48,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:48,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211773891] [2022-07-13 09:49:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:48,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:49:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211773891] [2022-07-13 09:49:49,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211773891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:49,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223109505] [2022-07-13 09:49:49,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:49:49,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:49,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:49,075 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) [2022-07-13 09:49:49,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 09:49:49,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:49:49,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:49:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 09:49:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:49:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 09:49:49,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:49:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 09:49:49,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223109505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:49:49,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:49:49,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-13 09:49:49,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827568650] [2022-07-13 09:49:49,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:49:49,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 09:49:49,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 09:49:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-13 09:49:49,268 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:49,348 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-07-13 09:49:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 09:49:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-13 09:49:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:49,350 INFO L225 Difference]: With dead ends: 59 [2022-07-13 09:49:49,350 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 09:49:49,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-07-13 09:49:49,351 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:49,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 41 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:49:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 09:49:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2022-07-13 09:49:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-13 09:49:49,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2022-07-13 09:49:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:49,356 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-13 09:49:49,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-13 09:49:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 09:49:49,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:49,364 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:49,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 09:49:49,564 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 [2022-07-13 09:49:49,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1992579314, now seen corresponding path program 3 times [2022-07-13 09:49:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:49,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200032744] [2022-07-13 09:49:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 09:49:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:49,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200032744] [2022-07-13 09:49:49,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200032744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:49,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761929065] [2022-07-13 09:49:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:49:49,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:49,704 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) [2022-07-13 09:49:49,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 09:49:49,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 09:49:49,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:49:49,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 09:49:49,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:49:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 09:49:49,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:49:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 09:49:49,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761929065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:49:49,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:49:49,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-13 09:49:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401783171] [2022-07-13 09:49:49,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:49:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 09:49:49,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 09:49:49,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-07-13 09:49:49,908 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:50,002 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-07-13 09:49:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 09:49:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 09:49:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:50,006 INFO L225 Difference]: With dead ends: 97 [2022-07-13 09:49:50,006 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 09:49:50,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-07-13 09:49:50,008 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:50,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 47 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:49:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 09:49:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 35. [2022-07-13 09:49:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-07-13 09:49:50,024 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 26 [2022-07-13 09:49:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:50,024 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-07-13 09:49:50,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-07-13 09:49:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 09:49:50,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:50,026 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:50,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 09:49:50,241 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 [2022-07-13 09:49:50,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1597249384, now seen corresponding path program 4 times [2022-07-13 09:49:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:50,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91849321] [2022-07-13 09:49:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:50,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 09:49:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91849321] [2022-07-13 09:49:50,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91849321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:50,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230664943] [2022-07-13 09:49:50,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:49:50,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:50,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:50,412 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) [2022-07-13 09:49:50,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 09:49:50,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:49:50,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:49:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:49:50,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:49:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 09:49:50,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:49:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 09:49:50,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230664943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:49:50,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:49:50,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-07-13 09:49:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146274348] [2022-07-13 09:49:50,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:49:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 09:49:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 09:49:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=742, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 09:49:50,818 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:50,985 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2022-07-13 09:49:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 09:49:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-13 09:49:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:50,989 INFO L225 Difference]: With dead ends: 165 [2022-07-13 09:49:50,989 INFO L226 Difference]: Without dead ends: 145 [2022-07-13 09:49:50,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=740, Invalid=742, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 09:49:50,991 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 252 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:50,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 82 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:49:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-13 09:49:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 64. [2022-07-13 09:49:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-07-13 09:49:50,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 33 [2022-07-13 09:49:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:50,998 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-07-13 09:49:50,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-07-13 09:49:51,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 09:49:51,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:51,001 INFO L195 NwaCegarLoop]: trace histogram [36, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:51,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 09:49:51,207 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 [2022-07-13 09:49:51,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1965047026, now seen corresponding path program 5 times [2022-07-13 09:49:51,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:51,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605076917] [2022-07-13 09:49:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:51,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-07-13 09:49:51,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605076917] [2022-07-13 09:49:51,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605076917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:51,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768433397] [2022-07-13 09:49:51,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:49:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:51,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:51,466 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) [2022-07-13 09:49:51,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process