./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/nested6.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/loop-invgen/nested6.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 327b0d5e70f014fe291a4771fe2bbb17cb1148e77fe8f6a261d10a47df8adacc --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:37:59,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:37:59,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:37:59,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:37:59,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:37:59,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:37:59,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:37:59,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:37:59,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:37:59,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:37:59,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:37:59,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:37:59,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:37:59,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:37:59,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:37:59,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:37:59,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:37:59,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:37:59,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:37:59,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:37:59,580 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:37:59,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:37:59,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:37:59,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:37:59,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:37:59,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:37:59,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:37:59,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:37:59,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:37:59,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:37:59,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:37:59,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:37:59,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:37:59,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:37:59,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:37:59,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:37:59,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:37:59,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:37:59,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:37:59,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:37:59,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:37:59,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:37:59,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:37:59,633 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:37:59,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:37:59,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:37:59,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:37:59,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:37:59,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:37:59,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:37:59,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:37:59,635 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:37:59,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:37:59,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:37:59,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:37:59,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:37:59,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:37:59,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:37:59,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:37:59,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:37:59,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:37:59,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:37:59,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:37:59,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:37:59,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:37:59,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:37:59,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:37:59,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:37:59,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:37:59,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:37:59,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:37:59,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:37:59,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:37:59,639 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:37:59,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:37:59,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:37:59,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 327b0d5e70f014fe291a4771fe2bbb17cb1148e77fe8f6a261d10a47df8adacc [2022-07-13 15:37:59,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:37:59,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:37:59,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:37:59,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:37:59,824 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:37:59,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested6.i [2022-07-13 15:37:59,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcd1699d/5e4522ef5b654bca87c32ec95cce0c23/FLAG6ff6adca0 [2022-07-13 15:38:00,273 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:38:00,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i [2022-07-13 15:38:00,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcd1699d/5e4522ef5b654bca87c32ec95cce0c23/FLAG6ff6adca0 [2022-07-13 15:38:00,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcd1699d/5e4522ef5b654bca87c32ec95cce0c23 [2022-07-13 15:38:00,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:38:00,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:38:00,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:38:00,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:38:00,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:38:00,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43aae326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00, skipping insertion in model container [2022-07-13 15:38:00,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:38:00,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:38:00,429 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/loop-invgen/nested6.i[893,906] [2022-07-13 15:38:00,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:38:00,446 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:38:00,456 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/loop-invgen/nested6.i[893,906] [2022-07-13 15:38:00,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:38:00,476 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:38:00,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00 WrapperNode [2022-07-13 15:38:00,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:38:00,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:38:00,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:38:00,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:38:00,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,500 INFO L137 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 58 [2022-07-13 15:38:00,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:38:00,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:38:00,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:38:00,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:38:00,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:38:00,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:38:00,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:38:00,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:38:00,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (1/1) ... [2022-07-13 15:38:00,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:38:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:00,541 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 15:38:00,542 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 15:38:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:38:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:38:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:38:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:38:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 15:38:00,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 15:38:00,619 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:38:00,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:38:00,735 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:38:00,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:38:00,740 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 15:38:00,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:38:00 BoogieIcfgContainer [2022-07-13 15:38:00,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:38:00,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:38:00,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:38:00,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:38:00,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:38:00" (1/3) ... [2022-07-13 15:38:00,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496eab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:38:00, skipping insertion in model container [2022-07-13 15:38:00,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:00" (2/3) ... [2022-07-13 15:38:00,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496eab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:38:00, skipping insertion in model container [2022-07-13 15:38:00,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:38:00" (3/3) ... [2022-07-13 15:38:00,748 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2022-07-13 15:38:00,758 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:38:00,759 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:38:00,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:38:00,829 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@67a3b0b7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c6d0f59 [2022-07-13 15:38:00,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:38:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:38:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 15:38:00,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:00,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:00,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash 18659702, now seen corresponding path program 1 times [2022-07-13 15:38:00,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113724637] [2022-07-13 15:38:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:00,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,075 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 15:38:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:01,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113724637] [2022-07-13 15:38:01,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113724637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:38:01,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:38:01,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:38:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831671292] [2022-07-13 15:38:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:38:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:38:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:38:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:38:01,109 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:01,193 INFO L93 Difference]: Finished difference Result 53 states and 75 transitions. [2022-07-13 15:38:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:38:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-13 15:38:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:01,208 INFO L225 Difference]: With dead ends: 53 [2022-07-13 15:38:01,208 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 15:38:01,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:38:01,214 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:01,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:38:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 15:38:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-13 15:38:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:38:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-13 15:38:01,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2022-07-13 15:38:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:01,243 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-13 15:38:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-13 15:38:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 15:38:01,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:01,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:38:01,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 86538895, now seen corresponding path program 1 times [2022-07-13 15:38:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44203890] [2022-07-13 15:38:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,322 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 15:38:01,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44203890] [2022-07-13 15:38:01,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44203890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:38:01,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:38:01,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:38:01,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386820937] [2022-07-13 15:38:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:38:01,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:38:01,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:38:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:38:01,328 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:01,455 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-07-13 15:38:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:38:01,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 15:38:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:01,456 INFO L225 Difference]: With dead ends: 37 [2022-07-13 15:38:01,456 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 15:38:01,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:38:01,458 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:01,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 15:38:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-07-13 15:38:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:38:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-13 15:38:01,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2022-07-13 15:38:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:01,466 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-13 15:38:01,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-13 15:38:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 15:38:01,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:01,467 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:01,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:38:01,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -539967828, now seen corresponding path program 1 times [2022-07-13 15:38:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904671083] [2022-07-13 15:38:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 15:38:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:01,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904671083] [2022-07-13 15:38:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904671083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:38:01,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:38:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:38:01,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996468596] [2022-07-13 15:38:01,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:38:01,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:38:01,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:38:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:38:01,523 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:38:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:01,589 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-07-13 15:38:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:38:01,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-13 15:38:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:01,590 INFO L225 Difference]: With dead ends: 42 [2022-07-13 15:38:01,590 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 15:38:01,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:38:01,591 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:01,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:38:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 15:38:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-13 15:38:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 15:38:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-07-13 15:38:01,600 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2022-07-13 15:38:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:01,601 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-07-13 15:38:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:38:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-07-13 15:38:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 15:38:01,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:01,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:38:01,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1577423131, now seen corresponding path program 1 times [2022-07-13 15:38:01,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:01,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049913669] [2022-07-13 15:38:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:01,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 15:38:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049913669] [2022-07-13 15:38:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049913669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903328986] [2022-07-13 15:38:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:01,673 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 15:38:01,675 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 15:38:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:38:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:38:01,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:38:01,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903328986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:38:01,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 15:38:01,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-07-13 15:38:01,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30472715] [2022-07-13 15:38:01,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:38:01,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:38:01,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:38:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-13 15:38:01,850 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:38:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:01,922 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2022-07-13 15:38:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:38:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-13 15:38:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:01,924 INFO L225 Difference]: With dead ends: 103 [2022-07-13 15:38:01,924 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 15:38:01,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:38:01,925 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:01,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 74 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:38:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 15:38:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-07-13 15:38:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 15:38:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-13 15:38:01,939 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 21 [2022-07-13 15:38:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:01,940 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-13 15:38:01,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:38:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-13 15:38:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 15:38:01,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:01,941 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:01,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:02,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:02,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1474854978, now seen corresponding path program 1 times [2022-07-13 15:38:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:02,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954493004] [2022-07-13 15:38:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:02,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:38:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:02,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 15:38:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:38:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954493004] [2022-07-13 15:38:02,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954493004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965283224] [2022-07-13 15:38:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:02,249 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 15:38:02,250 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 15:38:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:38:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:38:02,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:38:02,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965283224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:02,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:02,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2022-07-13 15:38:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876759953] [2022-07-13 15:38:02,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:02,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:38:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:38:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:38:02,368 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 15:38:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:02,705 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2022-07-13 15:38:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 15:38:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2022-07-13 15:38:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:02,706 INFO L225 Difference]: With dead ends: 114 [2022-07-13 15:38:02,706 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 15:38:02,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-07-13 15:38:02,710 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:02,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 147 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:38:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 15:38:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2022-07-13 15:38:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 49 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 15:38:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-07-13 15:38:02,726 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 28 [2022-07-13 15:38:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:02,726 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-07-13 15:38:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 15:38:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-07-13 15:38:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 15:38:02,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:02,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:02,750 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 15:38:02,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:02,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1870216975, now seen corresponding path program 1 times [2022-07-13 15:38:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113590688] [2022-07-13 15:38:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 15:38:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 15:38:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 15:38:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113590688] [2022-07-13 15:38:03,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113590688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456279561] [2022-07-13 15:38:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:03,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:03,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:03,034 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 15:38:03,035 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 15:38:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:38:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:38:03,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 15:38:03,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456279561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:03,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:03,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-13 15:38:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457570425] [2022-07-13 15:38:03,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 15:38:03,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 15:38:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-13 15:38:03,218 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 15:38:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:03,345 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2022-07-13 15:38:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:38:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2022-07-13 15:38:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:03,346 INFO L225 Difference]: With dead ends: 125 [2022-07-13 15:38:03,346 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 15:38:03,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-13 15:38:03,348 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:03,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 140 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 15:38:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2022-07-13 15:38:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 53 states have internal predecessors, (64), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 15:38:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-07-13 15:38:03,367 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 38 [2022-07-13 15:38:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:03,367 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-07-13 15:38:03,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 15:38:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-07-13 15:38:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 15:38:03,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:03,369 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:03,387 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 15:38:03,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:03,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2137083803, now seen corresponding path program 1 times [2022-07-13 15:38:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:03,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275256076] [2022-07-13 15:38:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 15:38:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 15:38:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 15:38:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 15:38:03,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275256076] [2022-07-13 15:38:03,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275256076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183145062] [2022-07-13 15:38:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:03,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:03,667 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 15:38:03,667 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 15:38:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:38:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:38:03,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 15:38:03,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183145062] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:03,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:03,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-13 15:38:03,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492732281] [2022-07-13 15:38:03,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:03,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 15:38:03,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 15:38:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:38:03,822 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 15:38:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:03,909 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2022-07-13 15:38:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:38:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 40 [2022-07-13 15:38:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:03,911 INFO L225 Difference]: With dead ends: 134 [2022-07-13 15:38:03,912 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 15:38:03,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:38:03,913 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:03,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 124 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 15:38:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2022-07-13 15:38:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 58 states have internal predecessors, (69), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 15:38:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-07-13 15:38:03,937 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 40 [2022-07-13 15:38:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:03,939 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-07-13 15:38:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 15:38:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-07-13 15:38:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 15:38:03,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:03,944 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:03,971 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 15:38:04,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:04,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1264542415, now seen corresponding path program 1 times [2022-07-13 15:38:04,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326727224] [2022-07-13 15:38:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:04,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 15:38:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:04,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 15:38:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:04,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 15:38:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 15:38:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 15:38:04,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:04,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326727224] [2022-07-13 15:38:04,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326727224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:04,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764858067] [2022-07-13 15:38:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:04,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:04,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:04,200 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 15:38:04,201 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 15:38:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 15:38:04,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 15:38:04,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 15:38:04,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764858067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:04,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:04,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 14 [2022-07-13 15:38:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90847760] [2022-07-13 15:38:04,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 15:38:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 15:38:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:38:04,371 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 15:38:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:04,778 INFO L93 Difference]: Finished difference Result 162 states and 222 transitions. [2022-07-13 15:38:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 15:38:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 51 [2022-07-13 15:38:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:04,779 INFO L225 Difference]: With dead ends: 162 [2022-07-13 15:38:04,779 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 15:38:04,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 15:38:04,781 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:04,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 124 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 15:38:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 15:38:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states 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 15:38:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 15:38:04,782 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2022-07-13 15:38:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:04,782 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 15:38:04,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 15:38:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 15:38:04,782 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 15:38:04,784 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 15:38:04,801 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 15:38:04,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:04,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 15:38:05,741 INFO L895 garLoopResultBuilder]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~i~0#1|))) (and (<= .cse0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= .cse0 |ULTIMATE.start_main_~k~0#1|))) [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~k~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) [2022-07-13 15:38:05,741 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~k~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) [2022-07-13 15:38:05,741 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~i~0#1|))) (and (<= .cse0 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~k~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= .cse0 |ULTIMATE.start_main_~k~0#1|))) [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 36 38) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point L33-2(lines 33 45) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L895 garLoopResultBuilder]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~k~0#1|))) (or (and .cse0 .cse1 (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~j~0#1|)) (and (= |ULTIMATE.start_main_~i~0#1| 0) .cse0 .cse1))) [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 32) no Hoare annotation was computed. [2022-07-13 15:38:05,741 INFO L899 garLoopResultBuilder]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L902 garLoopResultBuilder]: At program point L46(lines 24 48) the Hoare annotation is: true [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point L42(lines 34 44) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 44) the Hoare annotation is: (and (<= (* 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~k~0#1|)) [2022-07-13 15:38:05,742 INFO L902 garLoopResultBuilder]: At program point L47(lines 24 48) the Hoare annotation is: true [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 43) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-07-13 15:38:05,742 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-07-13 15:38:05,744 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:05,745 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 15:38:05,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 03:38:05 BoogieIcfgContainer [2022-07-13 15:38:05,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 15:38:05,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 15:38:05,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 15:38:05,757 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 15:38:05,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:38:00" (3/4) ... [2022-07-13 15:38:05,759 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 15:38:05,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-13 15:38:05,768 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-13 15:38:05,768 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-13 15:38:05,768 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 15:38:05,768 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 15:38:05,788 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 15:38:05,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 15:38:05,789 INFO L158 Benchmark]: Toolchain (without parser) took 5498.46ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 56.0MB in the beginning and 83.2MB in the end (delta: -27.2MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,789 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 44.5MB in the beginning and 44.4MB in the end (delta: 47.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 15:38:05,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.99ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 55.7MB in the beginning and 83.0MB in the end (delta: -27.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.18ms. Allocated memory is still 107.0MB. Free memory was 83.0MB in the beginning and 81.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,790 INFO L158 Benchmark]: Boogie Preprocessor took 11.92ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 80.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,791 INFO L158 Benchmark]: RCFGBuilder took 228.66ms. Allocated memory is still 107.0MB. Free memory was 80.4MB in the beginning and 70.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,791 INFO L158 Benchmark]: TraceAbstraction took 5013.23ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 70.4MB in the beginning and 86.4MB in the end (delta: -16.0MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,791 INFO L158 Benchmark]: Witness Printer took 32.08ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 83.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 15:38:05,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 44.5MB in the beginning and 44.4MB in the end (delta: 47.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.99ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 55.7MB in the beginning and 83.0MB in the end (delta: -27.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.18ms. Allocated memory is still 107.0MB. Free memory was 83.0MB in the beginning and 81.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.92ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 80.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 228.66ms. Allocated memory is still 107.0MB. Free memory was 80.4MB in the beginning and 70.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5013.23ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 70.4MB in the beginning and 86.4MB in the end (delta: -16.0MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. * Witness Printer took 32.08ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 83.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 260 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 234 mSDsluCounter, 843 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 637 mSDsCounter, 215 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 988 IncrementalHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 215 mSolverCounterUnsat, 206 mSDtfsCounter, 988 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 460 GetRequests, 334 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=7, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 84 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 65 PreInvPairs, 136 NumberOfFragments, 110 HoareAnnotationTreeSize, 65 FomulaSimplifications, -276 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 19230 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 398 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 538 ConstructedInterpolants, 0 QuantifiedInterpolants, 1383 SizeOfPredicates, 21 NumberOfNonLiveVariables, 465 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 398/439 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((k <= n && n <= k) && n <= j) || ((i == 0 && k <= n) && n <= k) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (2 * i <= j && k <= n) && n <= k - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((2 * i <= j && k <= n) && j + 1 <= n) && 2 * i <= k RESULT: Ultimate proved your program to be correct! [2022-07-13 15:38:05,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE