./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_init7_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_init7_ground-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 095ff128d46790285bc3a18356d3bb4884a680aceaaaa262887ebe8922b6a30f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:26:03,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:26:03,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:26:03,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:26:03,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:26:03,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:26:03,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:26:03,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:26:03,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:26:03,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:26:03,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:26:03,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:26:03,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:26:03,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:26:03,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:26:03,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:26:03,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:26:03,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:26:03,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:26:03,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:26:03,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:26:03,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:26:03,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:26:03,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:26:03,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:26:03,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:26:03,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:26:03,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:26:03,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:26:03,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:26:03,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:26:03,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:26:03,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:26:03,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:26:03,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:26:03,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:26:03,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:26:03,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:26:03,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:26:03,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:26:03,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:26:03,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:26:03,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:26:03,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:26:03,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:26:03,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:26:03,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:26:03,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:26:03,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:26:03,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:26:03,610 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:26:03,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:26:03,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:26:03,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:26:03,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:26:03,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:26:03,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:26:03,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:26:03,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:26:03,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:26:03,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:26:03,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:26:03,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:26:03,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:26:03,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:26:03,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:26:03,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:26:03,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:26:03,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:26:03,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:26:03,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:26:03,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:26:03,614 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:26:03,614 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:26:03,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:26:03,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:26:03,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 095ff128d46790285bc3a18356d3bb4884a680aceaaaa262887ebe8922b6a30f [2021-12-15 21:26:03,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:26:03,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:26:03,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:26:03,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:26:03,860 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:26:03,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2021-12-15 21:26:03,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39ce628f3/af3d52fe2ad142eabde8efe12b934282/FLAG4ae47b026 [2021-12-15 21:26:04,283 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:26:04,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2021-12-15 21:26:04,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39ce628f3/af3d52fe2ad142eabde8efe12b934282/FLAG4ae47b026 [2021-12-15 21:26:04,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39ce628f3/af3d52fe2ad142eabde8efe12b934282 [2021-12-15 21:26:04,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:26:04,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:26:04,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:26:04,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:26:04,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:26:04,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498847c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04, skipping insertion in model container [2021-12-15 21:26:04,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:26:04,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:26:04,444 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_init7_ground-2.i[816,829] [2021-12-15 21:26:04,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:26:04,465 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:26:04,473 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_init7_ground-2.i[816,829] [2021-12-15 21:26:04,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:26:04,488 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:26:04,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04 WrapperNode [2021-12-15 21:26:04,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:26:04,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:26:04,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:26:04,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:26:04,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,513 INFO L137 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-15 21:26:04,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:26:04,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:26:04,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:26:04,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:26:04,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:26:04,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:26:04,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:26:04,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:26:04,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (1/1) ... [2021-12-15 21:26:04,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:26:04,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:26:04,556 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) [2021-12-15 21:26:04,558 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 [2021-12-15 21:26:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:26:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:26:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:26:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:26:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:26:04,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:26:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:26:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:26:04,631 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:26:04,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:26:04,766 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:26:04,770 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:26:04,770 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-15 21:26:04,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:26:04 BoogieIcfgContainer [2021-12-15 21:26:04,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:26:04,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:26:04,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:26:04,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:26:04,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:26:04" (1/3) ... [2021-12-15 21:26:04,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b24407d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:26:04, skipping insertion in model container [2021-12-15 21:26:04,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:26:04" (2/3) ... [2021-12-15 21:26:04,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b24407d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:26:04, skipping insertion in model container [2021-12-15 21:26:04,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:26:04" (3/3) ... [2021-12-15 21:26:04,778 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2021-12-15 21:26:04,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:26:04,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:26:04,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:26:04,831 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:26:04,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:26:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 21:26:04,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:26:04,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:26:04,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:26:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:26:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -495328290, now seen corresponding path program 1 times [2021-12-15 21:26:04,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:26:04,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080349743] [2021-12-15 21:26:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:04,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:26:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:26:05,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:26:05,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080349743] [2021-12-15 21:26:05,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080349743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:26:05,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:26:05,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:26:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939552085] [2021-12-15 21:26:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:26:05,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:26:05,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:26:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:26:05,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:26:05,066 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 3 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) [2021-12-15 21:26:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:26:05,151 INFO L93 Difference]: Finished difference Result 56 states and 100 transitions. [2021-12-15 21:26:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:26:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2021-12-15 21:26:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:26:05,162 INFO L225 Difference]: With dead ends: 56 [2021-12-15 21:26:05,162 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 21:26:05,164 INFO L932 BasicCegarLoop]: 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 [2021-12-15 21:26:05,168 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:26:05,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:26:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 21:26:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-15 21:26:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-15 21:26:05,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2021-12-15 21:26:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:26:05,209 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-15 21:26:05,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-12-15 21:26:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-15 21:26:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 21:26:05,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:26:05,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:26:05,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:26:05,212 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:26:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:26:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1838625458, now seen corresponding path program 1 times [2021-12-15 21:26:05,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:26:05,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371254431] [2021-12-15 21:26:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:05,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:26:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:26:05,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:26:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371254431] [2021-12-15 21:26:05,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371254431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:26:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757249357] [2021-12-15 21:26:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:05,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:26:05,288 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) [2021-12-15 21:26:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:26:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 21:26:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:26:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:26:05,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:26:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:26:05,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757249357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:26:05,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:26:05,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 21:26:05,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104630485] [2021-12-15 21:26:05,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:26:05,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:26:05,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:26:05,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:26:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:26:05,530 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:26:05,612 INFO L93 Difference]: Finished difference Result 75 states and 109 transitions. [2021-12-15 21:26:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:26:05,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-12-15 21:26:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:26:05,614 INFO L225 Difference]: With dead ends: 75 [2021-12-15 21:26:05,614 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 21:26:05,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:26:05,617 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:26:05,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:26:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 21:26:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-15 21:26:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-12-15 21:26:05,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 26 [2021-12-15 21:26:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:26:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-12-15 21:26:05,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-12-15 21:26:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 21:26:05,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:26:05,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:26:05,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:26:05,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:05,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:26:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:26:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1915847130, now seen corresponding path program 2 times [2021-12-15 21:26:05,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:26:05,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035172284] [2021-12-15 21:26:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:05,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:26:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-15 21:26:05,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:26:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035172284] [2021-12-15 21:26:05,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035172284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:26:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989062193] [2021-12-15 21:26:05,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:26:05,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:26:05,956 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) [2021-12-15 21:26:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:26:06,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:26:06,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:26:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:26:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:26:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-15 21:26:06,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:26:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-15 21:26:06,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989062193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:26:06,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:26:06,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-15 21:26:06,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538886799] [2021-12-15 21:26:06,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:26:06,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 21:26:06,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:26:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 21:26:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:26:06,272 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-12-15 21:26:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:26:06,445 INFO L93 Difference]: Finished difference Result 135 states and 190 transitions. [2021-12-15 21:26:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 21:26:06,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 21:26:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:26:06,447 INFO L225 Difference]: With dead ends: 135 [2021-12-15 21:26:06,448 INFO L226 Difference]: Without dead ends: 92 [2021-12-15 21:26:06,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:26:06,451 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:26:06,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:26:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-15 21:26:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-15 21:26:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-12-15 21:26:06,476 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 47 [2021-12-15 21:26:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:26:06,476 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-12-15 21:26:06,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-12-15 21:26:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-12-15 21:26:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 21:26:06,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:26:06,481 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:26:06,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:26:06,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-15 21:26:06,698 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:26:06,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:26:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1268791078, now seen corresponding path program 3 times [2021-12-15 21:26:06,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:26:06,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075128623] [2021-12-15 21:26:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:06,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:26:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-12-15 21:26:06,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:26:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075128623] [2021-12-15 21:26:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075128623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:26:06,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626965713] [2021-12-15 21:26:06,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:26:06,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:26:06,964 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) [2021-12-15 21:26:06,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:26:12,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 21:26:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:26:12,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:26:12,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:26:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-12-15 21:26:12,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:26:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-12-15 21:26:12,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626965713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:26:12,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:26:12,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 21:26:12,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853605978] [2021-12-15 21:26:12,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:26:12,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 21:26:12,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:26:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 21:26:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:26:12,931 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:26:13,218 INFO L93 Difference]: Finished difference Result 255 states and 352 transitions. [2021-12-15 21:26:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 21:26:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-15 21:26:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:26:13,221 INFO L225 Difference]: With dead ends: 255 [2021-12-15 21:26:13,221 INFO L226 Difference]: Without dead ends: 176 [2021-12-15 21:26:13,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:26:13,225 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:26:13,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:26:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-15 21:26:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-15 21:26:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0457142857142858) internal successors, (183), 175 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2021-12-15 21:26:13,244 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 89 [2021-12-15 21:26:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:26:13,244 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2021-12-15 21:26:13,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2021-12-15 21:26:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-15 21:26:13,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:26:13,246 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:26:13,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:26:13,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:13,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:26:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:26:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash 126801626, now seen corresponding path program 4 times [2021-12-15 21:26:13,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:26:13,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332429420] [2021-12-15 21:26:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:13,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:26:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-12-15 21:26:13,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:26:13,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332429420] [2021-12-15 21:26:13,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332429420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:26:13,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697428682] [2021-12-15 21:26:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:26:13,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:13,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:26:13,837 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) [2021-12-15 21:26:13,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:26:14,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:26:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:26:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 21:26:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:26:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-12-15 21:26:14,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:26:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-12-15 21:26:14,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697428682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:26:14,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:26:14,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-15 21:26:14,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928768339] [2021-12-15 21:26:14,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:26:14,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-15 21:26:14,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:26:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-15 21:26:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 21:26:14,893 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:26:15,507 INFO L93 Difference]: Finished difference Result 495 states and 676 transitions. [2021-12-15 21:26:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 21:26:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-15 21:26:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:26:15,509 INFO L225 Difference]: With dead ends: 495 [2021-12-15 21:26:15,509 INFO L226 Difference]: Without dead ends: 344 [2021-12-15 21:26:15,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 21:26:15,511 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:26:15,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:26:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-15 21:26:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-12-15 21:26:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0233236151603498) internal successors, (351), 343 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 351 transitions. [2021-12-15 21:26:15,524 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 351 transitions. Word has length 173 [2021-12-15 21:26:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:26:15,524 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 351 transitions. [2021-12-15 21:26:15,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:26:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 351 transitions. [2021-12-15 21:26:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-15 21:26:15,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:26:15,528 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:26:15,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:26:15,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:15,743 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:26:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:26:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash -866716966, now seen corresponding path program 5 times [2021-12-15 21:26:15,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:26:15,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777327094] [2021-12-15 21:26:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:26:15,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:26:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:26:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2021-12-15 21:26:16,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:26:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777327094] [2021-12-15 21:26:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777327094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:26:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864281679] [2021-12-15 21:26:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:26:16,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:26:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:26:16,718 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) [2021-12-15 21:26:16,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process