./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_monotonic.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-industry-pattern/array_monotonic.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 5e947ce3cb6be538c3110154d89a790a98803ec545aa8464d99fb543118ea442 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:05:37,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:05:37,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:05:37,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:05:37,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:05:37,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:05:37,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:05:37,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:05:37,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:05:37,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:05:37,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:05:37,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:05:37,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:05:37,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:05:37,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:05:37,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:05:37,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:05:37,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:05:37,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:05:37,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:05:37,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:05:37,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:05:37,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:05:37,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:05:37,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:05:37,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:05:37,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:05:37,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:05:37,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:05:37,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:05:37,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:05:37,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:05:37,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:05:37,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:05:37,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:05:37,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:05:37,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:05:37,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:05:37,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:05:37,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:05:37,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:05:37,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:05:37,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:05:37,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:05:37,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:05:37,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:05:37,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:05:37,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:05:37,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:05:37,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:05:37,488 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:05:37,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:05:37,488 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:05:37,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:05:37,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:05:37,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:05:37,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:05:37,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:05:37,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:05:37,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:05:37,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:05:37,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:05:37,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:05:37,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:05:37,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:05:37,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:05:37,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:05:37,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:05:37,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:05:37,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:05:37,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:05:37,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:05:37,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:05:37,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:05:37,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:05:37,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:05:37,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e947ce3cb6be538c3110154d89a790a98803ec545aa8464d99fb543118ea442 [2021-12-22 08:05:37,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:05:37,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:05:37,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:05:37,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:05:37,653 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:05:37,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_monotonic.i [2021-12-22 08:05:37,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6dc0326d/b5712152af934cda90490a675f89f9e7/FLAGe5267fd62 [2021-12-22 08:05:38,120 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:05:38,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_monotonic.i [2021-12-22 08:05:38,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6dc0326d/b5712152af934cda90490a675f89f9e7/FLAGe5267fd62 [2021-12-22 08:05:38,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6dc0326d/b5712152af934cda90490a675f89f9e7 [2021-12-22 08:05:38,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:05:38,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:05:38,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:05:38,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:05:38,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:05:38,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374cdfd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38, skipping insertion in model container [2021-12-22 08:05:38,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:05:38,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:05:38,300 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-industry-pattern/array_monotonic.i[808,821] [2021-12-22 08:05:38,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:05:38,316 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:05:38,322 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-industry-pattern/array_monotonic.i[808,821] [2021-12-22 08:05:38,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:05:38,336 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:05:38,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38 WrapperNode [2021-12-22 08:05:38,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:05:38,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:05:38,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:05:38,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:05:38,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,355 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-12-22 08:05:38,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:05:38,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:05:38,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:05:38,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:05:38,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:05:38,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:05:38,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:05:38,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:05:38,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (1/1) ... [2021-12-22 08:05:38,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:05:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:05:38,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:05:38,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:05:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:05:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:05:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:05:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:05:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:05:38,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:05:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:05:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:05:38,467 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:05:38,468 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:05:38,566 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:05:38,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:05:38,571 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 08:05:38,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:38 BoogieIcfgContainer [2021-12-22 08:05:38,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:05:38,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:05:38,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:05:38,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:05:38,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:05:38" (1/3) ... [2021-12-22 08:05:38,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d386f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:38, skipping insertion in model container [2021-12-22 08:05:38,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:38" (2/3) ... [2021-12-22 08:05:38,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d386f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:38, skipping insertion in model container [2021-12-22 08:05:38,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:38" (3/3) ... [2021-12-22 08:05:38,591 INFO L111 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2021-12-22 08:05:38,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:05:38,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:05:38,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:05:38,644 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:05:38,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:05:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 08:05:38,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:38,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:38,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-12-22 08:05:38,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:38,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952447270] [2021-12-22 08:05:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:38,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:38,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:38,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952447270] [2021-12-22 08:05:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952447270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:05:38,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:05:38,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:05:38,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652790849] [2021-12-22 08:05:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:05:38,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:05:38,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:05:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:05:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:05:38,796 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:05:38,804 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-12-22 08:05:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:05:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-12-22 08:05:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:05:38,810 INFO L225 Difference]: With dead ends: 29 [2021-12-22 08:05:38,810 INFO L226 Difference]: Without dead ends: 13 [2021-12-22 08:05:38,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:05:38,814 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:05:38,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:05:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-22 08:05:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-22 08:05:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-12-22 08:05:38,833 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-12-22 08:05:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:05:38,833 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-12-22 08:05:38,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-12-22 08:05:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 08:05:38,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:38,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:38,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:05:38,834 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-12-22 08:05:38,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:38,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409924640] [2021-12-22 08:05:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:38,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:38,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:38,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409924640] [2021-12-22 08:05:38,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409924640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:05:38,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:05:38,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:05:38,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971132520] [2021-12-22 08:05:38,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:05:38,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:05:38,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:05:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:05:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:05:38,906 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:05:38,933 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-12-22 08:05:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:05:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-12-22 08:05:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:05:38,935 INFO L225 Difference]: With dead ends: 31 [2021-12-22 08:05:38,935 INFO L226 Difference]: Without dead ends: 23 [2021-12-22 08:05:38,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:05:38,936 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:05:38,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:05:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-22 08:05:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-12-22 08:05:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-12-22 08:05:38,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-12-22 08:05:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:05:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-12-22 08:05:38,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-12-22 08:05:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 08:05:38,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:38,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:38,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:05:38,942 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:38,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1819905507, now seen corresponding path program 1 times [2021-12-22 08:05:38,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:38,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159620694] [2021-12-22 08:05:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:38,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:39,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:39,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159620694] [2021-12-22 08:05:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159620694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:05:39,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146398890] [2021-12-22 08:05:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:39,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:05:39,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:05:39,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:05:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:05:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:05:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:39,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:05:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:39,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146398890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:05:39,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:05:39,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 08:05:39,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344567385] [2021-12-22 08:05:39,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:05:39,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:05:39,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:05:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:05:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:05:39,142 INFO L87 Difference]: Start difference. First operand 14 states and 17 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) [2021-12-22 08:05:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:05:39,178 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-22 08:05:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:05:39,179 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 11 [2021-12-22 08:05:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:05:39,180 INFO L225 Difference]: With dead ends: 53 [2021-12-22 08:05:39,180 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 08:05:39,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:05:39,183 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:05:39,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:05:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 08:05:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2021-12-22 08:05:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-22 08:05:39,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2021-12-22 08:05:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:05:39,188 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-22 08:05:39,188 INFO L471 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) [2021-12-22 08:05:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-22 08:05:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 08:05:39,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:39,189 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:39,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:05:39,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:39,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash -215393963, now seen corresponding path program 2 times [2021-12-22 08:05:39,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980789886] [2021-12-22 08:05:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:39,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:39,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980789886] [2021-12-22 08:05:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980789886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:05:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672404601] [2021-12-22 08:05:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:05:39,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:05:39,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:05:39,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:05:39,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:05:39,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:05:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:05:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:05:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:39,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:05:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672404601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:05:39,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:05:39,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 08:05:39,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660772920] [2021-12-22 08:05:39,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:05:39,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:05:39,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:05:39,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:05:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:05:39,700 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:05:39,796 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2021-12-22 08:05:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:05:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 20 [2021-12-22 08:05:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:05:39,806 INFO L225 Difference]: With dead ends: 113 [2021-12-22 08:05:39,806 INFO L226 Difference]: Without dead ends: 105 [2021-12-22 08:05:39,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:05:39,810 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 254 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:05:39,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 65 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:05:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-22 08:05:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-12-22 08:05:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-12-22 08:05:39,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2021-12-22 08:05:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:05:39,819 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-12-22 08:05:39,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-12-22 08:05:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 08:05:39,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:39,820 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:39,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:05:40,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 08:05:40,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash -175662507, now seen corresponding path program 3 times [2021-12-22 08:05:40,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:40,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346628740] [2021-12-22 08:05:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:40,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:40,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:40,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346628740] [2021-12-22 08:05:40,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346628740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:05:40,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693376183] [2021-12-22 08:05:40,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:05:40,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:05:40,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:05:40,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:05:40,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 08:05:40,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:05:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 08:05:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:05:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:40,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:05:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:40,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693376183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:05:40,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:05:40,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 08:05:40,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915464511] [2021-12-22 08:05:40,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:05:40,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 08:05:40,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:05:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 08:05:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:05:40,799 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:05:40,980 INFO L93 Difference]: Finished difference Result 233 states and 291 transitions. [2021-12-22 08:05:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 08:05:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-22 08:05:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:05:40,984 INFO L225 Difference]: With dead ends: 233 [2021-12-22 08:05:40,985 INFO L226 Difference]: Without dead ends: 225 [2021-12-22 08:05:40,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:05:40,986 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 546 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:05:40,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 140 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:05:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-22 08:05:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 77. [2021-12-22 08:05:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 76 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2021-12-22 08:05:41,004 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 38 [2021-12-22 08:05:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:05:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2021-12-22 08:05:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2021-12-22 08:05:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 08:05:41,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:41,008 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:41,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 08:05:41,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:41,212 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash -414622635, now seen corresponding path program 4 times [2021-12-22 08:05:41,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789994962] [2021-12-22 08:05:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:41,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:41,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789994962] [2021-12-22 08:05:41,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789994962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:05:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710004844] [2021-12-22 08:05:41,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:05:41,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:41,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:05:41,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:05:41,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:05:41,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:05:41,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:05:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 08:05:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:05:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:41,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:05:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:42,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710004844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:05:42,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:05:42,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 08:05:42,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333105310] [2021-12-22 08:05:42,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:05:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 08:05:42,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:05:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 08:05:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 08:05:42,430 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:05:42,838 INFO L93 Difference]: Finished difference Result 473 states and 591 transitions. [2021-12-22 08:05:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 08:05:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 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 74 [2021-12-22 08:05:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:05:42,840 INFO L225 Difference]: With dead ends: 473 [2021-12-22 08:05:42,840 INFO L226 Difference]: Without dead ends: 465 [2021-12-22 08:05:42,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 08:05:42,842 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1356 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:05:42,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 284 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:05:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-22 08:05:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 149. [2021-12-22 08:05:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 148 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2021-12-22 08:05:42,849 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 74 [2021-12-22 08:05:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:05:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2021-12-22 08:05:42,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 49 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:05:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2021-12-22 08:05:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-22 08:05:42,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:05:42,851 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:05:42,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:05:43,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:43,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:05:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:05:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 413261909, now seen corresponding path program 5 times [2021-12-22 08:05:43,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:05:43,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551119730] [2021-12-22 08:05:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:05:43,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:05:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:05:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:05:44,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:05:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551119730] [2021-12-22 08:05:44,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551119730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:05:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295834546] [2021-12-22 08:05:44,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:05:44,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:05:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:05:44,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:05:44,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process