./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.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 e683f6e2db40131b14c5db4c44cb0bc308464b8b58cfd5d36c28d692bcb3b448 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:57:04,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:57:04,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:57:04,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:57:04,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:57:04,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:57:04,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:57:04,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:57:04,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:57:04,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:57:04,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:57:04,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:57:04,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:57:04,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:57:04,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:57:04,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:57:04,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:57:04,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:57:04,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:57:04,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:57:04,634 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:57:04,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:57:04,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:57:04,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:57:04,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:57:04,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:57:04,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:57:04,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:57:04,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:57:04,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:57:04,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:57:04,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:57:04,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:57:04,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:57:04,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:57:04,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:57:04,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:57:04,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:57:04,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:57:04,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:57:04,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:57:04,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:57:04,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:57:04,673 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:57:04,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:57:04,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:57:04,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:57:04,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:57:04,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:57:04,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:57:04,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:57:04,676 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:57:04,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:57:04,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:57:04,678 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:57:04,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:57:04,678 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:57:04,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:57:04,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:57:04,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:57:04,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:57:04,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:57:04,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:57:04,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:57:04,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:57:04,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:57:04,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:57:04,680 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:57:04,680 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:57:04,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:57:04,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e683f6e2db40131b14c5db4c44cb0bc308464b8b58cfd5d36c28d692bcb3b448 [2022-07-13 10:57:04,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:57:04,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:57:04,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:57:04,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:57:04,878 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:57:04,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i [2022-07-13 10:57:04,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812f77e12/ad5caa03df2244d8bfd500618294f779/FLAG2e41cd7d0 [2022-07-13 10:57:05,267 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:57:05,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i [2022-07-13 10:57:05,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812f77e12/ad5caa03df2244d8bfd500618294f779/FLAG2e41cd7d0 [2022-07-13 10:57:05,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812f77e12/ad5caa03df2244d8bfd500618294f779 [2022-07-13 10:57:05,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:57:05,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:57:05,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:57:05,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:57:05,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:57:05,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3758f4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05, skipping insertion in model container [2022-07-13 10:57:05,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:57:05,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:57:05,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i[822,835] [2022-07-13 10:57:05,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:57:05,415 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:57:05,424 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound-1.i[822,835] [2022-07-13 10:57:05,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:57:05,437 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:57:05,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05 WrapperNode [2022-07-13 10:57:05,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:57:05,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:57:05,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:57:05,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:57:05,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,460 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-07-13 10:57:05,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:57:05,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:57:05,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:57:05,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:57:05,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:57:05,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:57:05,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:57:05,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:57:05,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (1/1) ... [2022-07-13 10:57:05,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:57:05,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:05,495 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 10:57:05,497 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 10:57:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:57:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:57:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:57:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:57:05,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:57:05,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:57:05,561 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:57:05,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:57:05,633 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:57:05,637 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:57:05,637 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:57:05,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:57:05 BoogieIcfgContainer [2022-07-13 10:57:05,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:57:05,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:57:05,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:57:05,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:57:05,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:57:05" (1/3) ... [2022-07-13 10:57:05,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b2784a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:57:05, skipping insertion in model container [2022-07-13 10:57:05,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:57:05" (2/3) ... [2022-07-13 10:57:05,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b2784a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:57:05, skipping insertion in model container [2022-07-13 10:57:05,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:57:05" (3/3) ... [2022-07-13 10:57:05,644 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.i [2022-07-13 10:57:05,653 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:57:05,653 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:57:05,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:57:05,695 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@41e33260, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@39fb7767 [2022-07-13 10:57:05,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:57:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:57:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 10:57:05,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:05,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:57:05,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2022-07-13 10:57:05,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:05,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692692315] [2022-07-13 10:57:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:05,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,823 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 10:57:05,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692692315] [2022-07-13 10:57:05,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692692315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:57:05,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:57:05,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:57:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405584279] [2022-07-13 10:57:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:57:05,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:57:05,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:57:05,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:57:05,849 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:57:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:05,886 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2022-07-13 10:57:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:57:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 10:57:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:05,894 INFO L225 Difference]: With dead ends: 42 [2022-07-13 10:57:05,894 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 10:57:05,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:57:05,899 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:57:05,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:57:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 10:57:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-07-13 10:57:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 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 10:57:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-13 10:57:05,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-07-13 10:57:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:05,923 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-13 10:57:05,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:57:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-13 10:57:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 10:57:05,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:05,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:57:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:57:05,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2022-07-13 10:57:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840876210] [2022-07-13 10:57:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:57:05,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840876210] [2022-07-13 10:57:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840876210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47794959] [2022-07-13 10:57:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:05,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:05,969 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 10:57:05,971 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 10:57:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:06,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:57:06,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:57:06,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:57:06,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47794959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:57:06,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:57:06,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 10:57:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710416895] [2022-07-13 10:57:06,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:57:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 10:57:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 10:57:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:57:06,093 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:57:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:06,153 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-07-13 10:57:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:57:06,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 10:57:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:06,155 INFO L225 Difference]: With dead ends: 51 [2022-07-13 10:57:06,155 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 10:57:06,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:57:06,156 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:57:06,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:57:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 10:57:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2022-07-13 10:57:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 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 10:57:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-13 10:57:06,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2022-07-13 10:57:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:06,161 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-13 10:57:06,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:57:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-13 10:57:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 10:57:06,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:06,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:57:06,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 10:57:06,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:06,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1754797751, now seen corresponding path program 2 times [2022-07-13 10:57:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:06,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067591565] [2022-07-13 10:57:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:57:06,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067591565] [2022-07-13 10:57:06,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067591565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:06,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492362682] [2022-07-13 10:57:06,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:57:06,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:06,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:06,460 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 10:57:06,462 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 10:57:06,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:57:06,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:57:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:57:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:57:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:57:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492362682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:57:06,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:57:06,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-13 10:57:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175765376] [2022-07-13 10:57:06,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:57:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:57:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:57:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:57:06,631 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 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 10:57:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:06,724 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-07-13 10:57:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:57:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 10:57:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:06,728 INFO L225 Difference]: With dead ends: 89 [2022-07-13 10:57:06,729 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 10:57:06,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:57:06,737 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:57:06,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 29 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:57:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 10:57:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2022-07-13 10:57:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 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 10:57:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-07-13 10:57:06,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2022-07-13 10:57:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:06,757 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-07-13 10:57:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 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 10:57:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-07-13 10:57:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:57:06,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:06,759 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:57:06,776 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 10:57:06,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 10:57:06,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash -707072841, now seen corresponding path program 3 times [2022-07-13 10:57:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975343820] [2022-07-13 10:57:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:06,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:57:07,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:07,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975343820] [2022-07-13 10:57:07,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975343820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:07,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317998708] [2022-07-13 10:57:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:57:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:07,109 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 10:57:07,127 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 10:57:07,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 10:57:07,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:57:07,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:57:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 10:57:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 10:57:07,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317998708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:57:07,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:57:07,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2022-07-13 10:57:07,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648173906] [2022-07-13 10:57:07,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:57:07,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:57:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:57:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:57:07,289 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:57:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:07,443 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2022-07-13 10:57:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:57:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-13 10:57:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:07,445 INFO L225 Difference]: With dead ends: 197 [2022-07-13 10:57:07,445 INFO L226 Difference]: Without dead ends: 178 [2022-07-13 10:57:07,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:57:07,446 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 256 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:57:07,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 78 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:57:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-13 10:57:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 80. [2022-07-13 10:57:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 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 10:57:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-07-13 10:57:07,454 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 39 [2022-07-13 10:57:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:07,455 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-07-13 10:57:07,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:57:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-07-13 10:57:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 10:57:07,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:07,456 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:57:07,483 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 10:57:07,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:07,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 4 times [2022-07-13 10:57:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004924334] [2022-07-13 10:57:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:07,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-13 10:57:07,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004924334] [2022-07-13 10:57:07,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004924334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260316137] [2022-07-13 10:57:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:57:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:07,942 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 10:57:07,943 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 10:57:08,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:57:08,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:57:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 10:57:08,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-13 10:57:08,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-13 10:57:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260316137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:57:08,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:57:08,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2022-07-13 10:57:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528877620] [2022-07-13 10:57:08,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:57:08,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 10:57:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 10:57:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:57:08,472 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 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 10:57:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:08,836 INFO L93 Difference]: Finished difference Result 411 states and 452 transitions. [2022-07-13 10:57:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 10:57:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-13 10:57:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:08,838 INFO L225 Difference]: With dead ends: 411 [2022-07-13 10:57:08,839 INFO L226 Difference]: Without dead ends: 368 [2022-07-13 10:57:08,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:57:08,840 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 584 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:57:08,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 154 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:57:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-13 10:57:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 156. [2022-07-13 10:57:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 0 states have call successors, (0), 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 10:57:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-07-13 10:57:08,856 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 77 [2022-07-13 10:57:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:08,857 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-07-13 10:57:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 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 10:57:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-07-13 10:57:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-13 10:57:08,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:08,859 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:57:08,895 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 10:57:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:09,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash 433379653, now seen corresponding path program 5 times [2022-07-13 10:57:09,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:09,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147094228] [2022-07-13 10:57:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-07-13 10:57:09,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147094228] [2022-07-13 10:57:09,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147094228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113402086] [2022-07-13 10:57:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:57:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:09,716 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 10:57:09,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process