./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/gr2006.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 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:19:42,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:19:42,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:19:42,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:19:42,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:19:42,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:19:42,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:19:42,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:19:42,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:19:42,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:19:42,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:19:42,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:19:42,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:19:42,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:19:42,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:19:42,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:19:42,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:19:42,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:19:42,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:19:42,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:19:42,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:19:42,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:19:42,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:19:42,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:19:42,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:19:42,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:19:42,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:19:42,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:19:42,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:19:42,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:19:42,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:19:42,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:19:42,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:19:42,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:19:42,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:19:42,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:19:42,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:19:42,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:19:42,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:19:42,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:19:42,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:19:42,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:19:42,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:19:42,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:19:42,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:19:42,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:19:42,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:19:42,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:19:42,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:19:42,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:19:42,222 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:19:42,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:19:42,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:19:42,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:19:42,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:19:42,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:19:42,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:19:42,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:19:42,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:19:42,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:19:42,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:19:42,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:19:42,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:19:42,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:19:42,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:19:42,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:19:42,225 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:19:42,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:19:42,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:19:42,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:19:42,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 [2021-12-21 12:19:42,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:19:42,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:19:42,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:19:42,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:19:42,444 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:19:42,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gr2006.i [2021-12-21 12:19:42,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a744b48d/c83cf99f53fd4669bf07ed4d1d621e98/FLAG7a06c661d [2021-12-21 12:19:42,838 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:19:42,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i [2021-12-21 12:19:42,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a744b48d/c83cf99f53fd4669bf07ed4d1d621e98/FLAG7a06c661d [2021-12-21 12:19:43,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a744b48d/c83cf99f53fd4669bf07ed4d1d621e98 [2021-12-21 12:19:43,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:19:43,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:19:43,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:19:43,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:19:43,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:19:43,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54797390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43, skipping insertion in model container [2021-12-21 12:19:43,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:19:43,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:19:43,410 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-12-21 12:19:43,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:19:43,426 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:19:43,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-12-21 12:19:43,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:19:43,444 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:19:43,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43 WrapperNode [2021-12-21 12:19:43,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:19:43,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:19:43,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:19:43,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:19:43,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,466 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-21 12:19:43,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:19:43,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:19:43,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:19:43,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:19:43,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:19:43,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:19:43,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:19:43,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:19:43,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (1/1) ... [2021-12-21 12:19:43,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:19:43,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:43,499 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) [2021-12-21 12:19:43,510 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 [2021-12-21 12:19:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:19:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:19:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:19:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:19:43,564 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:19:43,565 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:19:43,626 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:19:43,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:19:43,631 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:19:43,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:19:43 BoogieIcfgContainer [2021-12-21 12:19:43,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:19:43,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:19:43,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:19:43,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:19:43,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:19:43" (1/3) ... [2021-12-21 12:19:43,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b040fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:19:43, skipping insertion in model container [2021-12-21 12:19:43,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:19:43" (2/3) ... [2021-12-21 12:19:43,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b040fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:19:43, skipping insertion in model container [2021-12-21 12:19:43,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:19:43" (3/3) ... [2021-12-21 12:19:43,649 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-12-21 12:19:43,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:19:43,653 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:19:43,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:19:43,687 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 [2021-12-21 12:19:43,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:19:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) [2021-12-21 12:19:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:19:43,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:43,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:19:43,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-12-21 12:19:43,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:43,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921603734] [2021-12-21 12:19:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:43,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:43,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921603734] [2021-12-21 12:19:43,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921603734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:19:43,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:19:43,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:19:43,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095912456] [2021-12-21 12:19:43,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:19:43,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:19:43,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:19:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:19:43,855 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:19:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:43,863 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-12-21 12:19:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:19:43,865 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-12-21 12:19:43,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:43,870 INFO L225 Difference]: With dead ends: 21 [2021-12-21 12:19:43,870 INFO L226 Difference]: Without dead ends: 9 [2021-12-21 12:19:43,872 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 [2021-12-21 12:19:43,875 INFO L933 BasicCegarLoop]: 14 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, 14 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 [2021-12-21 12:19:43,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-21 12:19:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-21 12:19:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:19:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-21 12:19:43,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-21 12:19:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:43,901 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-21 12:19:43,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:19:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-21 12:19:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:19:43,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:43,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:43,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:19:43,903 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:43,905 INFO L85 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-12-21 12:19:43,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:43,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488753840] [2021-12-21 12:19:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:43,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:44,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:44,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488753840] [2021-12-21 12:19:44,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488753840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:19:44,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:19:44,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:19:44,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360322115] [2021-12-21 12:19:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:19:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:19:44,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:19:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:19:44,021 INFO L87 Difference]: Start difference. First operand 9 states and 10 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) [2021-12-21 12:19:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:44,056 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-21 12:19:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:19:44,058 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 [2021-12-21 12:19:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:44,059 INFO L225 Difference]: With dead ends: 23 [2021-12-21 12:19:44,059 INFO L226 Difference]: Without dead ends: 16 [2021-12-21 12:19:44,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:19:44,060 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:44,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-21 12:19:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-12-21 12:19:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-12-21 12:19:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-12-21 12:19:44,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-12-21 12:19:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:44,066 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-12-21 12:19:44,067 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) [2021-12-21 12:19:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-12-21 12:19:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:19:44,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:44,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:44,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:19:44,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-12-21 12:19:44,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:44,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393057408] [2021-12-21 12:19:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:44,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:44,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:44,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393057408] [2021-12-21 12:19:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393057408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:19:44,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:19:44,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:19:44,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358318287] [2021-12-21 12:19:44,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:19:44,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:19:44,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:19:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:19:44,102 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-21 12:19:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:44,128 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-12-21 12:19:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:19:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-12-21 12:19:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:44,129 INFO L225 Difference]: With dead ends: 18 [2021-12-21 12:19:44,130 INFO L226 Difference]: Without dead ends: 14 [2021-12-21 12:19:44,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:19:44,132 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:44,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-21 12:19:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-21 12:19:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-12-21 12:19:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-21 12:19:44,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-21 12:19:44,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:44,138 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-21 12:19:44,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-21 12:19:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-21 12:19:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:19:44,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:44,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:44,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:19:44,140 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1661002755, now seen corresponding path program 1 times [2021-12-21 12:19:44,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:44,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201694439] [2021-12-21 12:19:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:44,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:44,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:44,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201694439] [2021-12-21 12:19:44,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201694439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:44,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364311188] [2021-12-21 12:19:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:44,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:44,177 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) [2021-12-21 12:19:44,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:19:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:19:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:44,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:44,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364311188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:44,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:44,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 12:19:44,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430407280] [2021-12-21 12:19:44,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:44,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:19:44,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:19:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:19:44,289 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:19:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:44,311 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-12-21 12:19:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:19:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:19:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:44,312 INFO L225 Difference]: With dead ends: 35 [2021-12-21 12:19:44,313 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 12:19:44,313 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 [2021-12-21 12:19:44,314 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:44,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 12:19:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-21 12:19:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-21 12:19:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-21 12:19:44,318 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 11 [2021-12-21 12:19:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:44,318 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-21 12:19:44,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:19:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-21 12:19:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 12:19:44,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:44,319 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:44,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:44,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:44,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:44,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1073415472, now seen corresponding path program 2 times [2021-12-21 12:19:44,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:44,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347682325] [2021-12-21 12:19:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:44,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:44,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:44,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347682325] [2021-12-21 12:19:44,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347682325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691649012] [2021-12-21 12:19:44,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:19:44,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:44,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:44,613 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) [2021-12-21 12:19:44,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:19:44,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:19:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:19:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:19:44,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:19:44,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:19:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691649012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:44,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:44,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-21 12:19:44,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923940123] [2021-12-21 12:19:44,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:44,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 12:19:44,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 12:19:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:19:44,829 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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) [2021-12-21 12:19:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:44,970 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-12-21 12:19:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 12:19:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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 [2021-12-21 12:19:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:44,972 INFO L225 Difference]: With dead ends: 47 [2021-12-21 12:19:44,972 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 12:19:44,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-12-21 12:19:44,975 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:44,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 12:19:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-12-21 12:19:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-12-21 12:19:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-21 12:19:44,990 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2021-12-21 12:19:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-21 12:19:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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) [2021-12-21 12:19:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-21 12:19:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 12:19:44,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:44,993 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:45,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:45,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1219917565, now seen corresponding path program 3 times [2021-12-21 12:19:45,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617403842] [2021-12-21 12:19:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:45,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:45,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617403842] [2021-12-21 12:19:45,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617403842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022041942] [2021-12-21 12:19:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:19:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:45,264 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) [2021-12-21 12:19:45,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:19:45,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-21 12:19:45,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:19:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:19:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:45,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:45,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022041942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:45,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:45,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-21 12:19:45,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846680236] [2021-12-21 12:19:45,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:45,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 12:19:45,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 12:19:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:19:45,573 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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) [2021-12-21 12:19:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:45,620 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-12-21 12:19:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:19:45,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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 35 [2021-12-21 12:19:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:45,621 INFO L225 Difference]: With dead ends: 80 [2021-12-21 12:19:45,621 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 12:19:45,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:19:45,622 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:45,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 12:19:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-12-21 12:19:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 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) [2021-12-21 12:19:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-12-21 12:19:45,626 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 35 [2021-12-21 12:19:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:45,626 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-12-21 12:19:45,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 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) [2021-12-21 12:19:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-12-21 12:19:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 12:19:45,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:45,628 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 12, 5, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:45,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:45,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:45,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1918910832, now seen corresponding path program 4 times [2021-12-21 12:19:45,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:45,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153272408] [2021-12-21 12:19:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:45,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:46,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153272408] [2021-12-21 12:19:46,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153272408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847969233] [2021-12-21 12:19:46,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:19:46,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:46,007 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) [2021-12-21 12:19:46,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:19:46,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:19:46,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:19:46,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 12:19:46,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:46,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:46,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847969233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:46,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:46,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-12-21 12:19:46,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596719242] [2021-12-21 12:19:46,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:46,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 12:19:46,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 12:19:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-12-21 12:19:46,466 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 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) [2021-12-21 12:19:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:46,537 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-12-21 12:19:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 12:19:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 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 56 [2021-12-21 12:19:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:46,539 INFO L225 Difference]: With dead ends: 122 [2021-12-21 12:19:46,539 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 12:19:46,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-12-21 12:19:46,540 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:46,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:19:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 12:19:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-12-21 12:19:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 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) [2021-12-21 12:19:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-12-21 12:19:46,547 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 56 [2021-12-21 12:19:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:46,547 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-12-21 12:19:46,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 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) [2021-12-21 12:19:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-12-21 12:19:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 12:19:46,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:46,549 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 26, 5, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:46,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:46,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:46,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash -707387216, now seen corresponding path program 5 times [2021-12-21 12:19:46,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:46,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674937873] [2021-12-21 12:19:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:46,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 346 proven. 1027 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:47,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:47,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674937873] [2021-12-21 12:19:47,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674937873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:47,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499833925] [2021-12-21 12:19:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 12:19:47,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:47,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:47,132 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) [2021-12-21 12:19:47,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:19:47,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-21 12:19:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:19:47,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 12:19:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 346 proven. 1027 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:47,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 346 proven. 1027 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 12:19:48,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499833925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:48,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:48,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2021-12-21 12:19:48,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729409304] [2021-12-21 12:19:48,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:48,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-21 12:19:48,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-21 12:19:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 12:19:48,052 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 states have internal predecessors, (164), 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) [2021-12-21 12:19:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:48,160 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2021-12-21 12:19:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 12:19:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 states have internal predecessors, (164), 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 98 [2021-12-21 12:19:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:48,161 INFO L225 Difference]: With dead ends: 194 [2021-12-21 12:19:48,162 INFO L226 Difference]: Without dead ends: 174 [2021-12-21 12:19:48,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 12:19:48,163 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:48,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 70 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:19:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-21 12:19:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-12-21 12:19:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.035294117647059) internal successors, (176), 170 states have internal predecessors, (176), 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) [2021-12-21 12:19:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 176 transitions. [2021-12-21 12:19:48,172 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 176 transitions. Word has length 98 [2021-12-21 12:19:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:48,172 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 176 transitions. [2021-12-21 12:19:48,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 states have internal predecessors, (164), 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) [2021-12-21 12:19:48,172 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 176 transitions. [2021-12-21 12:19:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-21 12:19:48,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:48,174 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 50, 5, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:48,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:48,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:48,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1661700912, now seen corresponding path program 6 times [2021-12-21 12:19:48,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:48,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150579256] [2021-12-21 12:19:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:48,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2021-12-21 12:19:48,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150579256] [2021-12-21 12:19:48,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150579256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152211924] [2021-12-21 12:19:48,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 12:19:48,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:48,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:48,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:19:48,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:19:48,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-21 12:19:48,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:19:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:19:48,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2021-12-21 12:19:48,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2021-12-21 12:19:48,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152211924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:48,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:48,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2021-12-21 12:19:48,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671323591] [2021-12-21 12:19:48,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:48,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:19:48,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:19:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:19:48,948 INFO L87 Difference]: Start difference. First operand 171 states and 176 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:19:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:48,975 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2021-12-21 12:19:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 12:19:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-12-21 12:19:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:48,978 INFO L225 Difference]: With dead ends: 191 [2021-12-21 12:19:48,978 INFO L226 Difference]: Without dead ends: 187 [2021-12-21 12:19:48,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 343 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:19:48,979 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:48,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:19:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-21 12:19:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2021-12-21 12:19:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 173 states have internal predecessors, (180), 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) [2021-12-21 12:19:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2021-12-21 12:19:48,997 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 170 [2021-12-21 12:19:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:48,998 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2021-12-21 12:19:48,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:19:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2021-12-21 12:19:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-21 12:19:49,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:49,005 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 50, 6, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:49,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:49,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:49,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1272078235, now seen corresponding path program 7 times [2021-12-21 12:19:49,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837614362] [2021-12-21 12:19:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:49,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 1681 proven. 86 refuted. 0 times theorem prover too weak. 2853 trivial. 0 not checked. [2021-12-21 12:19:49,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837614362] [2021-12-21 12:19:49,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837614362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165908601] [2021-12-21 12:19:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 12:19:49,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:49,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:49,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:19:49,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:19:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-21 12:19:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 4518 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:19:50,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:19:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 4518 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:19:51,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165908601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:19:51,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:19:51,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 53, 53] total 97 [2021-12-21 12:19:51,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886866117] [2021-12-21 12:19:51,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:19:51,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-21 12:19:51,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:19:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-21 12:19:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-21 12:19:51,535 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand has 97 states, 97 states have (on average 3.1752577319587627) internal successors, (308), 97 states have internal predecessors, (308), 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) [2021-12-21 12:19:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:19:51,935 INFO L93 Difference]: Finished difference Result 1033 states and 1353 transitions. [2021-12-21 12:19:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-21 12:19:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.1752577319587627) internal successors, (308), 97 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-21 12:19:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:19:51,939 INFO L225 Difference]: With dead ends: 1033 [2021-12-21 12:19:51,939 INFO L226 Difference]: Without dead ends: 1029 [2021-12-21 12:19:51,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-21 12:19:51,941 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 15 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:19:51,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 274 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:19:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-12-21 12:19:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 309. [2021-12-21 12:19:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 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) [2021-12-21 12:19:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-12-21 12:19:51,971 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 173 [2021-12-21 12:19:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:19:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-12-21 12:19:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.1752577319587627) internal successors, (308), 97 states have internal predecessors, (308), 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) [2021-12-21 12:19:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-12-21 12:19:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-21 12:19:51,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:19:51,975 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-12-21 12:19:52,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:19:52,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:52,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:19:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:19:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 8 times [2021-12-21 12:19:52,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:19:52,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732272527] [2021-12-21 12:19:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:19:52,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:19:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:19:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:55,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:19:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732272527] [2021-12-21 12:19:55,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732272527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:19:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371127989] [2021-12-21 12:19:55,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:19:55,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:19:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:19:55,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:19:55,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:19:55,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:19:55,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:19:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 205 conjunts are in the unsatisfiable core [2021-12-21 12:19:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:19:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:19:58,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:20:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:20:00,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371127989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:20:00,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:20:00,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 155 [2021-12-21 12:20:00,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309661205] [2021-12-21 12:20:00,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:20:00,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-21 12:20:00,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:20:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-21 12:20:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=21012, Unknown=0, NotChecked=0, Total=23870 [2021-12-21 12:20:00,486 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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) [2021-12-21 12:20:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:20:05,588 INFO L93 Difference]: Finished difference Result 4542 states and 5921 transitions. [2021-12-21 12:20:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-21 12:20:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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 308 [2021-12-21 12:20:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:20:05,599 INFO L225 Difference]: With dead ends: 4542 [2021-12-21 12:20:05,600 INFO L226 Difference]: Without dead ends: 4382 [2021-12-21 12:20:05,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 535 SyntacticMatches, 31 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10751 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2863, Invalid=21317, Unknown=0, NotChecked=0, Total=24180 [2021-12-21 12:20:05,607 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 249 mSDsluCounter, 15922 mSDsCounter, 0 mSdLazyCounter, 17428 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 16175 SdHoareTripleChecker+Invalid, 17486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 17428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-21 12:20:05,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 16175 Invalid, 17486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 17428 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-21 12:20:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-12-21 12:20:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 4186. [2021-12-21 12:20:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 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) [2021-12-21 12:20:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 4286 transitions. [2021-12-21 12:20:05,777 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 4286 transitions. Word has length 308 [2021-12-21 12:20:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:20:05,777 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 4286 transitions. [2021-12-21 12:20:05,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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) [2021-12-21 12:20:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 4286 transitions. [2021-12-21 12:20:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-21 12:20:05,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:20:05,780 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-12-21 12:20:05,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-21 12:20:05,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 12:20:05,996 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:20:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:20:05,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 9 times [2021-12-21 12:20:05,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:20:05,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856982367] [2021-12-21 12:20:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:20:05,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:20:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:20:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-21 12:20:07,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:20:07,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856982367] [2021-12-21 12:20:07,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856982367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:20:07,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179148338] [2021-12-21 12:20:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:20:07,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:20:07,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:20:07,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:20:07,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:20:07,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-12-21 12:20:07,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:20:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-21 12:20:07,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:20:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 12:20:07,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:20:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 12:20:08,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179148338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:20:08,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:20:08,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 55 [2021-12-21 12:20:08,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660460668] [2021-12-21 12:20:08,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:20:08,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-21 12:20:08,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:20:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-21 12:20:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 12:20:08,299 INFO L87 Difference]: Start difference. First operand 4186 states and 4286 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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) [2021-12-21 12:20:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:20:08,491 INFO L93 Difference]: Finished difference Result 4337 states and 4437 transitions. [2021-12-21 12:20:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-21 12:20:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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 311 [2021-12-21 12:20:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:20:08,492 INFO L225 Difference]: With dead ends: 4337 [2021-12-21 12:20:08,492 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 12:20:08,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 670 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 12:20:08,497 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:20:08,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:20:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 12:20:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 12:20:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:20:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 12:20:08,499 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-12-21 12:20:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:20:08,499 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 12:20:08,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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) [2021-12-21 12:20:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 12:20:08,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 12:20:08,502 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:20:08,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:20:08,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:20:08,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 12:20:10,411 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-21 12:20:10,412 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-12-21 12:20:10,412 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-12-21 12:20:10,412 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-12-21 12:20:10,412 INFO L861 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-12-21 12:20:10,412 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-21 12:20:10,412 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-21 12:20:10,412 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-21 12:20:10,413 INFO L854 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse4 (<= 49 |ULTIMATE.start_main_~y~0#1|)) (.cse5 (<= |ULTIMATE.start_main_~y~0#1| 49)) (.cse20 (<= 31 |ULTIMATE.start_main_~y~0#1|)) (.cse21 (<= |ULTIMATE.start_main_~y~0#1| 31)) (.cse10 (<= 17 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (<= |ULTIMATE.start_main_~y~0#1| 17)) (.cse12 (<= 42 |ULTIMATE.start_main_~y~0#1|)) (.cse13 (<= |ULTIMATE.start_main_~y~0#1| 42)) (.cse28 (<= 22 |ULTIMATE.start_main_~y~0#1|)) (.cse29 (<= |ULTIMATE.start_main_~y~0#1| 22)) (.cse30 (<= 34 |ULTIMATE.start_main_~y~0#1|)) (.cse31 (<= |ULTIMATE.start_main_~y~0#1| 34)) (.cse32 (<= |ULTIMATE.start_main_~y~0#1| 14)) (.cse33 (<= 14 |ULTIMATE.start_main_~y~0#1|)) (.cse58 (<= 16 |ULTIMATE.start_main_~y~0#1|)) (.cse59 (<= |ULTIMATE.start_main_~y~0#1| 16)) (.cse46 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse47 (<= |ULTIMATE.start_main_~y~0#1| 1)) (.cse24 (<= |ULTIMATE.start_main_~y~0#1| 27)) (.cse25 (<= 27 |ULTIMATE.start_main_~y~0#1|)) (.cse14 (<= |ULTIMATE.start_main_~y~0#1| 9)) (.cse15 (<= 9 |ULTIMATE.start_main_~y~0#1|)) (.cse8 (<= 4 |ULTIMATE.start_main_~y~0#1|)) (.cse9 (<= |ULTIMATE.start_main_~y~0#1| 4)) (.cse60 (<= 10 |ULTIMATE.start_main_~y~0#1|)) (.cse61 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse62 (<= |ULTIMATE.start_main_~y~0#1| 39)) (.cse63 (<= 39 |ULTIMATE.start_main_~y~0#1|)) (.cse90 (= |ULTIMATE.start_main_~y~0#1| 0)) (.cse70 (<= 11 |ULTIMATE.start_main_~y~0#1|)) (.cse71 (<= |ULTIMATE.start_main_~y~0#1| 11)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 7)) (.cse7 (<= 7 |ULTIMATE.start_main_~y~0#1|)) (.cse68 (<= |ULTIMATE.start_main_~y~0#1| 28)) (.cse69 (<= 28 |ULTIMATE.start_main_~y~0#1|)) (.cse80 (<= |ULTIMATE.start_main_~y~0#1| 35)) (.cse81 (<= 35 |ULTIMATE.start_main_~y~0#1|)) (.cse64 (<= 19 |ULTIMATE.start_main_~y~0#1|)) (.cse65 (<= |ULTIMATE.start_main_~y~0#1| 19)) (.cse76 (<= 8 |ULTIMATE.start_main_~y~0#1|)) (.cse77 (<= |ULTIMATE.start_main_~y~0#1| 8)) (.cse18 (<= |ULTIMATE.start_main_~y~0#1| 43)) (.cse19 (<= 43 |ULTIMATE.start_main_~y~0#1|)) (.cse95 (<= |ULTIMATE.start_main_~y~0#1| 15)) (.cse96 (<= 15 |ULTIMATE.start_main_~y~0#1|)) (.cse91 (<= 20 |ULTIMATE.start_main_~y~0#1|)) (.cse92 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse93 (<= |ULTIMATE.start_main_~y~0#1| 26)) (.cse94 (<= 26 |ULTIMATE.start_main_~y~0#1|)) (.cse0 (<= 5 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~y~0#1| 5)) (.cse40 (<= 48 |ULTIMATE.start_main_~y~0#1|)) (.cse41 (<= |ULTIMATE.start_main_~y~0#1| 48)) (.cse34 (<= |ULTIMATE.start_main_~y~0#1| 29)) (.cse35 (<= 29 |ULTIMATE.start_main_~y~0#1|)) (.cse44 (<= 30 |ULTIMATE.start_main_~y~0#1|)) (.cse45 (<= |ULTIMATE.start_main_~y~0#1| 30)) (.cse86 (<= |ULTIMATE.start_main_~y~0#1| 33)) (.cse87 (<= 33 |ULTIMATE.start_main_~y~0#1|)) (.cse56 (<= |ULTIMATE.start_main_~y~0#1| 18)) (.cse57 (<= 18 |ULTIMATE.start_main_~y~0#1|)) (.cse84 (<= 13 |ULTIMATE.start_main_~y~0#1|)) (.cse85 (<= |ULTIMATE.start_main_~y~0#1| 13)) (.cse54 (<= 21 |ULTIMATE.start_main_~y~0#1|)) (.cse55 (<= |ULTIMATE.start_main_~y~0#1| 21)) (.cse36 (<= |ULTIMATE.start_main_~y~0#1| 45)) (.cse37 (<= 45 |ULTIMATE.start_main_~y~0#1|)) (.cse48 (<= 12 |ULTIMATE.start_main_~y~0#1|)) (.cse49 (<= |ULTIMATE.start_main_~y~0#1| 12)) (.cse66 (<= 6 |ULTIMATE.start_main_~y~0#1|)) (.cse67 (<= |ULTIMATE.start_main_~y~0#1| 6)) (.cse16 (<= |ULTIMATE.start_main_~y~0#1| 46)) (.cse17 (<= 46 |ULTIMATE.start_main_~y~0#1|)) (.cse22 (<= 3 |ULTIMATE.start_main_~y~0#1|)) (.cse23 (<= |ULTIMATE.start_main_~y~0#1| 3)) (.cse97 (<= 25 |ULTIMATE.start_main_~y~0#1|)) (.cse98 (<= |ULTIMATE.start_main_~y~0#1| 25)) (.cse74 (<= |ULTIMATE.start_main_~y~0#1| 40)) (.cse75 (<= 40 |ULTIMATE.start_main_~y~0#1|)) (.cse72 (<= 23 |ULTIMATE.start_main_~y~0#1|)) (.cse73 (<= |ULTIMATE.start_main_~y~0#1| 23)) (.cse82 (<= 36 |ULTIMATE.start_main_~y~0#1|)) (.cse83 (<= |ULTIMATE.start_main_~y~0#1| 36)) (.cse52 (<= |ULTIMATE.start_main_~y~0#1| 37)) (.cse53 (<= 37 |ULTIMATE.start_main_~y~0#1|)) (.cse50 (<= 32 |ULTIMATE.start_main_~y~0#1|)) (.cse51 (<= |ULTIMATE.start_main_~y~0#1| 32)) (.cse38 (<= |ULTIMATE.start_main_~y~0#1| 44)) (.cse39 (<= 44 |ULTIMATE.start_main_~y~0#1|)) (.cse78 (<= 41 |ULTIMATE.start_main_~y~0#1|)) (.cse79 (<= |ULTIMATE.start_main_~y~0#1| 41)) (.cse42 (<= |ULTIMATE.start_main_~y~0#1| 24)) (.cse43 (<= 24 |ULTIMATE.start_main_~y~0#1|)) (.cse26 (<= 38 |ULTIMATE.start_main_~y~0#1|)) (.cse27 (<= |ULTIMATE.start_main_~y~0#1| 38)) (.cse2 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse3 (<= 2 |ULTIMATE.start_main_~y~0#1|)) (.cse88 (<= |ULTIMATE.start_main_~y~0#1| 47)) (.cse89 (<= 47 |ULTIMATE.start_main_~y~0#1|))) (or (and (= 5 |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1) (and (= 2 |ULTIMATE.start_main_~x~0#1|) .cse2 .cse3) (and .cse4 (= 49 |ULTIMATE.start_main_~x~0#1|) .cse5) (and .cse6 (= 7 |ULTIMATE.start_main_~x~0#1|) .cse7) (and .cse8 .cse9 (= |ULTIMATE.start_main_~x~0#1| 4)) (and .cse10 .cse11 (= |ULTIMATE.start_main_~x~0#1| 17)) (and .cse12 .cse13 (= 42 |ULTIMATE.start_main_~x~0#1|)) (and (= 9 |ULTIMATE.start_main_~x~0#1|) .cse14 .cse15) (and (<= 54 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 54) .cse16 .cse17) (and (<= 57 |ULTIMATE.start_main_~x~0#1|) .cse18 .cse19 (<= |ULTIMATE.start_main_~x~0#1| 57)) (and (<= 69 |ULTIMATE.start_main_~x~0#1|) .cse20 .cse21 (<= |ULTIMATE.start_main_~x~0#1| 69)) (and .cse4 .cse5 (<= 51 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 51)) (and (= 3 |ULTIMATE.start_main_~x~0#1|) .cse22 .cse23) (and .cse24 .cse25 (= |ULTIMATE.start_main_~x~0#1| 27)) (and .cse26 .cse27 (<= |ULTIMATE.start_main_~x~0#1| 62) (<= 62 |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~x~0#1| 78) .cse28 (<= 78 |ULTIMATE.start_main_~x~0#1|) .cse29) (and (= |ULTIMATE.start_main_~x~0#1| 34) .cse30 .cse31) (and (= 31 |ULTIMATE.start_main_~x~0#1|) .cse20 .cse21) (and (<= |ULTIMATE.start_main_~x~0#1| 86) .cse32 (<= 86 |ULTIMATE.start_main_~x~0#1|) .cse33) (and (<= 71 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 71) .cse34 .cse35) (and .cse36 (= |ULTIMATE.start_main_~x~0#1| 45) .cse37) (and .cse38 .cse39 (= 44 |ULTIMATE.start_main_~x~0#1|)) (and .cse40 .cse41 (<= 52 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 52)) (and .cse42 (<= |ULTIMATE.start_main_~x~0#1| 76) .cse43 (<= 76 |ULTIMATE.start_main_~x~0#1|)) (and .cse44 .cse45 (= 30 |ULTIMATE.start_main_~x~0#1|)) (and .cse46 (= |ULTIMATE.start_main_~x~0#1| 1) .cse47) (and .cse48 .cse49 (= |ULTIMATE.start_main_~x~0#1| 12)) (and .cse50 (<= 68 |ULTIMATE.start_main_~x~0#1|) .cse51 (<= |ULTIMATE.start_main_~x~0#1| 68)) (and .cse10 .cse11 (<= 83 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 83)) (and .cse52 .cse53 (= |ULTIMATE.start_main_~x~0#1| 37)) (and .cse12 .cse13 (<= 58 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 58)) (and .cse54 .cse55 (= 21 |ULTIMATE.start_main_~x~0#1|)) (and (= 22 |ULTIMATE.start_main_~x~0#1|) .cse28 .cse29) (and .cse56 .cse57 (= |ULTIMATE.start_main_~x~0#1| 18)) (and .cse58 (<= |ULTIMATE.start_main_~x~0#1| 84) (<= 84 |ULTIMATE.start_main_~x~0#1|) .cse59) (and (<= |ULTIMATE.start_main_~x~0#1| 90) .cse60 .cse61 (<= 90 |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~x~0#1| 61) .cse62 .cse63 (<= 61 |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~x~0#1| 66) .cse30 (<= 66 |ULTIMATE.start_main_~x~0#1|) .cse31) (and .cse32 (= 14 |ULTIMATE.start_main_~x~0#1|) .cse33) (and .cse64 (= 19 |ULTIMATE.start_main_~x~0#1|) .cse65) (and .cse66 (<= 94 |ULTIMATE.start_main_~x~0#1|) .cse67 (<= |ULTIMATE.start_main_~x~0#1| 94)) (and .cse68 (<= 72 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 72) .cse69) (and (= |ULTIMATE.start_main_~x~0#1| 11) .cse70 .cse71) (and .cse58 (= 16 |ULTIMATE.start_main_~x~0#1|) .cse59) (and .cse72 (= 23 |ULTIMATE.start_main_~x~0#1|) .cse73) (and (<= 99 |ULTIMATE.start_main_~x~0#1|) .cse46 .cse47 (<= |ULTIMATE.start_main_~x~0#1| 99)) (and .cse74 (<= |ULTIMATE.start_main_~x~0#1| 60) (<= 60 |ULTIMATE.start_main_~x~0#1|) .cse75) (and (<= 92 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 92) .cse76 .cse77) (and .cse24 (<= |ULTIMATE.start_main_~x~0#1| 73) .cse25 (<= 73 |ULTIMATE.start_main_~x~0#1|)) (and (= 41 |ULTIMATE.start_main_~x~0#1|) .cse78 .cse79) (and .cse80 .cse81 (= 35 |ULTIMATE.start_main_~x~0#1|)) (and (= |ULTIMATE.start_main_~x~0#1| 36) .cse82 .cse83) (and (<= |ULTIMATE.start_main_~x~0#1| 91) (<= 91 |ULTIMATE.start_main_~x~0#1|) .cse14 .cse15) (and .cse8 .cse9 (<= |ULTIMATE.start_main_~x~0#1| 96) (<= 96 |ULTIMATE.start_main_~x~0#1|)) (and (<= 87 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 87) .cse84 .cse85) (and (<= |ULTIMATE.start_main_~x~0#1| 67) .cse86 (<= 67 |ULTIMATE.start_main_~x~0#1|) .cse87) (and .cse88 (<= |ULTIMATE.start_main_~x~0#1| 53) .cse89 (<= 53 |ULTIMATE.start_main_~x~0#1|)) (and .cse60 .cse61 (= |ULTIMATE.start_main_~x~0#1| 10)) (and .cse90 (= |ULTIMATE.start_main_~x~0#1| 0)) (and .cse62 .cse63 (= |ULTIMATE.start_main_~x~0#1| 39)) (and .cse91 .cse92 (= |ULTIMATE.start_main_~x~0#1| 20)) (and (< 99 |ULTIMATE.start_main_~x~0#1|) .cse90 (<= |ULTIMATE.start_main_~x~0#1| 100)) (and (<= |ULTIMATE.start_main_~x~0#1| 89) .cse70 (<= 89 |ULTIMATE.start_main_~x~0#1|) .cse71) (and (<= |ULTIMATE.start_main_~x~0#1| 74) .cse93 (<= 74 |ULTIMATE.start_main_~x~0#1|) .cse94) (and .cse6 (<= 93 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 93) .cse7) (and .cse68 .cse69 (= |ULTIMATE.start_main_~x~0#1| 28)) (and .cse80 .cse81 (<= 65 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 65)) (and (<= 81 |ULTIMATE.start_main_~x~0#1|) .cse64 (<= |ULTIMATE.start_main_~x~0#1| 81) .cse65) (and .cse95 (= |ULTIMATE.start_main_~x~0#1| 15) .cse96) (and .cse76 (= |ULTIMATE.start_main_~x~0#1| 8) .cse77) (and .cse18 .cse19 (= |ULTIMATE.start_main_~x~0#1| 43)) (and .cse95 (<= 85 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 85) .cse96) (and (<= 80 |ULTIMATE.start_main_~x~0#1|) .cse91 .cse92 (<= |ULTIMATE.start_main_~x~0#1| 80)) (and .cse93 (= |ULTIMATE.start_main_~x~0#1| 26) .cse94) (and .cse0 .cse1 (<= 95 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 95)) (and .cse40 .cse41 (= |ULTIMATE.start_main_~x~0#1| 48)) (and .cse34 (= 29 |ULTIMATE.start_main_~x~0#1|) .cse35) (and (<= |ULTIMATE.start_main_~x~0#1| 70) .cse44 (<= 70 |ULTIMATE.start_main_~x~0#1|) .cse45) (and .cse86 (= |ULTIMATE.start_main_~x~0#1| 33) .cse87) (and (<= 82 |ULTIMATE.start_main_~x~0#1|) .cse56 .cse57 (<= |ULTIMATE.start_main_~x~0#1| 82)) (and (= |ULTIMATE.start_main_~x~0#1| 13) .cse84 .cse85) (and .cse54 .cse55 (<= |ULTIMATE.start_main_~x~0#1| 79) (<= 79 |ULTIMATE.start_main_~x~0#1|)) (and .cse36 (<= |ULTIMATE.start_main_~x~0#1| 55) (<= 55 |ULTIMATE.start_main_~x~0#1|) .cse37) (and (<= |ULTIMATE.start_main_~x~0#1| 75) .cse97 .cse98 (<= 75 |ULTIMATE.start_main_~x~0#1|)) (and (<= 50 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= |ULTIMATE.start_main_~y~0#1| 50) (<= 50 |ULTIMATE.start_main_~y~0#1|)) (and .cse48 .cse49 (<= 88 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 88)) (and .cse66 .cse67 (= 6 |ULTIMATE.start_main_~x~0#1|)) (and .cse16 .cse17 (= 46 |ULTIMATE.start_main_~x~0#1|)) (and (<= 97 |ULTIMATE.start_main_~x~0#1|) .cse22 (<= |ULTIMATE.start_main_~x~0#1| 97) .cse23) (and .cse97 .cse98 (= |ULTIMATE.start_main_~x~0#1| 25)) (and .cse74 .cse75 (= 40 |ULTIMATE.start_main_~x~0#1|)) (and .cse72 (<= |ULTIMATE.start_main_~x~0#1| 77) .cse73 (<= 77 |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~x~0#1| 64) (<= 64 |ULTIMATE.start_main_~x~0#1|) .cse82 .cse83) (and (<= |ULTIMATE.start_main_~x~0#1| 63) .cse52 .cse53 (<= 63 |ULTIMATE.start_main_~x~0#1|)) (and .cse50 (= 32 |ULTIMATE.start_main_~x~0#1|) .cse51) (and (<= |ULTIMATE.start_main_~x~0#1| 56) .cse38 (<= 56 |ULTIMATE.start_main_~x~0#1|) .cse39) (and (<= |ULTIMATE.start_main_~x~0#1| 59) .cse78 .cse79 (<= 59 |ULTIMATE.start_main_~x~0#1|)) (and .cse42 (= |ULTIMATE.start_main_~x~0#1| 24) .cse43) (and (= |ULTIMATE.start_main_~x~0#1| 38) .cse26 .cse27) (and .cse2 (<= 98 |ULTIMATE.start_main_~x~0#1|) .cse3 (<= |ULTIMATE.start_main_~x~0#1| 98)) (and .cse88 .cse89 (= 47 |ULTIMATE.start_main_~x~0#1|)))) [2021-12-21 12:20:10,413 INFO L858 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-12-21 12:20:10,413 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-12-21 12:20:10,413 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-12-21 12:20:10,413 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-12-21 12:20:10,415 INFO L732 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2021-12-21 12:20:10,417 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:20:10,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:20:10 BoogieIcfgContainer [2021-12-21 12:20:10,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:20:10,458 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:20:10,458 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:20:10,458 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:20:10,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:19:43" (3/4) ... [2021-12-21 12:20:10,460 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 12:20:10,467 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-21 12:20:10,467 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-21 12:20:10,467 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-21 12:20:10,467 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 12:20:10,500 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:20:10,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:20:10,501 INFO L158 Benchmark]: Toolchain (without parser) took 27220.11ms. Allocated memory was 86.0MB in the beginning and 232.8MB in the end (delta: 146.8MB). Free memory was 54.4MB in the beginning and 186.5MB in the end (delta: -132.1MB). Peak memory consumption was 150.7MB. Max. memory is 16.1GB. [2021-12-21 12:20:10,501 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory is still 43.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:20:10,501 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.30ms. Allocated memory is still 86.0MB. Free memory was 54.2MB in the beginning and 62.2MB in the end (delta: -8.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:20:10,501 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.91ms. Allocated memory is still 86.0MB. Free memory was 62.2MB in the beginning and 60.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:20:10,502 INFO L158 Benchmark]: Boogie Preprocessor took 11.90ms. Allocated memory is still 86.0MB. Free memory was 60.9MB in the beginning and 59.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:20:10,502 INFO L158 Benchmark]: RCFGBuilder took 162.13ms. Allocated memory is still 86.0MB. Free memory was 59.7MB in the beginning and 51.3MB in the end (delta: 8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:20:10,502 INFO L158 Benchmark]: TraceAbstraction took 26814.72ms. Allocated memory was 86.0MB in the beginning and 232.8MB in the end (delta: 146.8MB). Free memory was 50.8MB in the beginning and 53.5MB in the end (delta: -2.7MB). Peak memory consumption was 153.7MB. Max. memory is 16.1GB. [2021-12-21 12:20:10,503 INFO L158 Benchmark]: Witness Printer took 42.88ms. Allocated memory is still 232.8MB. Free memory was 53.5MB in the beginning and 186.5MB in the end (delta: -133.0MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2021-12-21 12:20:10,505 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory is still 43.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.30ms. Allocated memory is still 86.0MB. Free memory was 54.2MB in the beginning and 62.2MB in the end (delta: -8.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.91ms. Allocated memory is still 86.0MB. Free memory was 62.2MB in the beginning and 60.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.90ms. Allocated memory is still 86.0MB. Free memory was 60.9MB in the beginning and 59.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 162.13ms. Allocated memory is still 86.0MB. Free memory was 59.7MB in the beginning and 51.3MB in the end (delta: 8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 26814.72ms. Allocated memory was 86.0MB in the beginning and 232.8MB in the end (delta: 146.8MB). Free memory was 50.8MB in the beginning and 53.5MB in the end (delta: -2.7MB). Peak memory consumption was 153.7MB. Max. memory is 16.1GB. * Witness Printer took 42.88ms. Allocated memory is still 232.8MB. Free memory was 53.5MB in the beginning and 186.5MB in the end (delta: -133.0MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.7s, OverallIterations: 12, TraceHistogramMax: 102, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 394 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 394 mSDsluCounter, 16830 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16432 mSDsCounter, 384 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18659 IncrementalHoareTripleChecker+Invalid, 19043 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 384 mSolverCounterUnsat, 398 mSDtfsCounter, 18659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2666 GetRequests, 2200 SyntacticMatches, 37 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15807 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4186occurred in iteration=11, InterpolantAutomatonStates: 349, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 952 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1160 HoareAnnotationTreeSize, 3 FomulaSimplifications, 5250 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2308 NumberOfCodeBlocksAsserted, 192 NumberOfCheckSat, 3538 ConstructedInterpolants, 0 QuantifiedInterpolants, 11461 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2741 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 52962/124947 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((5 == x && 5 <= y) && y <= 5) || ((2 == x && y <= 2) && 2 <= y)) || ((49 <= y && 49 == x) && y <= 49)) || ((y <= 7 && 7 == x) && 7 <= y)) || ((4 <= y && y <= 4) && x == 4)) || ((17 <= y && y <= 17) && x == 17)) || ((42 <= y && y <= 42) && 42 == x)) || ((9 == x && y <= 9) && 9 <= y)) || (((54 <= x && x <= 54) && y <= 46) && 46 <= y)) || (((57 <= x && y <= 43) && 43 <= y) && x <= 57)) || (((69 <= x && 31 <= y) && y <= 31) && x <= 69)) || (((49 <= y && y <= 49) && 51 <= x) && x <= 51)) || ((3 == x && 3 <= y) && y <= 3)) || ((y <= 27 && 27 <= y) && x == 27)) || (((38 <= y && y <= 38) && x <= 62) && 62 <= x)) || (((x <= 78 && 22 <= y) && 78 <= x) && y <= 22)) || ((x == 34 && 34 <= y) && y <= 34)) || ((31 == x && 31 <= y) && y <= 31)) || (((x <= 86 && y <= 14) && 86 <= x) && 14 <= y)) || (((71 <= x && x <= 71) && y <= 29) && 29 <= y)) || ((y <= 45 && x == 45) && 45 <= y)) || ((y <= 44 && 44 <= y) && 44 == x)) || (((48 <= y && y <= 48) && 52 <= x) && x <= 52)) || (((y <= 24 && x <= 76) && 24 <= y) && 76 <= x)) || ((30 <= y && y <= 30) && 30 == x)) || ((1 <= y && x == 1) && y <= 1)) || ((12 <= y && y <= 12) && x == 12)) || (((32 <= y && 68 <= x) && y <= 32) && x <= 68)) || (((17 <= y && y <= 17) && 83 <= x) && x <= 83)) || ((y <= 37 && 37 <= y) && x == 37)) || (((42 <= y && y <= 42) && 58 <= x) && x <= 58)) || ((21 <= y && y <= 21) && 21 == x)) || ((22 == x && 22 <= y) && y <= 22)) || ((y <= 18 && 18 <= y) && x == 18)) || (((16 <= y && x <= 84) && 84 <= x) && y <= 16)) || (((x <= 90 && 10 <= y) && y <= 10) && 90 <= x)) || (((x <= 61 && y <= 39) && 39 <= y) && 61 <= x)) || (((x <= 66 && 34 <= y) && 66 <= x) && y <= 34)) || ((y <= 14 && 14 == x) && 14 <= y)) || ((19 <= y && 19 == x) && y <= 19)) || (((6 <= y && 94 <= x) && y <= 6) && x <= 94)) || (((y <= 28 && 72 <= x) && x <= 72) && 28 <= y)) || ((x == 11 && 11 <= y) && y <= 11)) || ((16 <= y && 16 == x) && y <= 16)) || ((23 <= y && 23 == x) && y <= 23)) || (((99 <= x && 1 <= y) && y <= 1) && x <= 99)) || (((y <= 40 && x <= 60) && 60 <= x) && 40 <= y)) || (((92 <= x && x <= 92) && 8 <= y) && y <= 8)) || (((y <= 27 && x <= 73) && 27 <= y) && 73 <= x)) || ((41 == x && 41 <= y) && y <= 41)) || ((y <= 35 && 35 <= y) && 35 == x)) || ((x == 36 && 36 <= y) && y <= 36)) || (((x <= 91 && 91 <= x) && y <= 9) && 9 <= y)) || (((4 <= y && y <= 4) && x <= 96) && 96 <= x)) || (((87 <= x && x <= 87) && 13 <= y) && y <= 13)) || (((x <= 67 && y <= 33) && 67 <= x) && 33 <= y)) || (((y <= 47 && x <= 53) && 47 <= y) && 53 <= x)) || ((10 <= y && y <= 10) && x == 10)) || (y == 0 && x == 0)) || ((y <= 39 && 39 <= y) && x == 39)) || ((20 <= y && y <= 20) && x == 20)) || ((99 < x && y == 0) && x <= 100)) || (((x <= 89 && 11 <= y) && 89 <= x) && y <= 11)) || (((x <= 74 && y <= 26) && 74 <= x) && 26 <= y)) || (((y <= 7 && 93 <= x) && x <= 93) && 7 <= y)) || ((y <= 28 && 28 <= y) && x == 28)) || (((y <= 35 && 35 <= y) && 65 <= x) && x <= 65)) || (((81 <= x && 19 <= y) && x <= 81) && y <= 19)) || ((y <= 15 && x == 15) && 15 <= y)) || ((8 <= y && x == 8) && y <= 8)) || ((y <= 43 && 43 <= y) && x == 43)) || (((y <= 15 && 85 <= x) && x <= 85) && 15 <= y)) || (((80 <= x && 20 <= y) && y <= 20) && x <= 80)) || ((y <= 26 && x == 26) && 26 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || ((48 <= y && y <= 48) && x == 48)) || ((y <= 29 && 29 == x) && 29 <= y)) || (((x <= 70 && 30 <= y) && 70 <= x) && y <= 30)) || ((y <= 33 && x == 33) && 33 <= y)) || (((82 <= x && y <= 18) && 18 <= y) && x <= 82)) || ((x == 13 && 13 <= y) && y <= 13)) || (((21 <= y && y <= 21) && x <= 79) && 79 <= x)) || (((y <= 45 && x <= 55) && 55 <= x) && 45 <= y)) || (((x <= 75 && 25 <= y) && y <= 25) && 75 <= x)) || (((50 <= x && x <= 50) && y <= 50) && 50 <= y)) || (((12 <= y && y <= 12) && 88 <= x) && x <= 88)) || ((6 <= y && y <= 6) && 6 == x)) || ((y <= 46 && 46 <= y) && 46 == x)) || (((97 <= x && 3 <= y) && x <= 97) && y <= 3)) || ((25 <= y && y <= 25) && x == 25)) || ((y <= 40 && 40 <= y) && 40 == x)) || (((23 <= y && x <= 77) && y <= 23) && 77 <= x)) || (((x <= 64 && 64 <= x) && 36 <= y) && y <= 36)) || (((x <= 63 && y <= 37) && 37 <= y) && 63 <= x)) || ((32 <= y && 32 == x) && y <= 32)) || (((x <= 56 && y <= 44) && 56 <= x) && 44 <= y)) || (((x <= 59 && 41 <= y) && y <= 41) && 59 <= x)) || ((y <= 24 && x == 24) && 24 <= y)) || ((x == 38 && 38 <= y) && y <= 38)) || (((y <= 2 && 98 <= x) && 2 <= y) && x <= 98)) || ((y <= 47 && 47 <= y) && 47 == x) RESULT: Ultimate proved your program to be correct! [2021-12-21 12:20:10,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE