./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum5.c -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 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:40:19,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:40:19,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:40:19,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:40:19,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:40:19,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:40:19,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:40:19,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:40:19,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:40:19,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:40:19,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:40:19,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:40:19,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:40:19,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:40:19,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:40:19,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:40:19,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:40:19,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:40:19,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:40:19,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:40:19,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:40:19,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:40:19,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:40:19,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:40:19,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:40:19,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:40:19,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:40:19,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:40:19,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:40:19,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:40:19,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:40:19,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:40:19,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:40:19,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:40:19,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:40:19,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:40:19,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:40:19,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:40:19,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:40:19,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:40:19,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:40:19,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:40:19,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:40:19,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:40:19,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:40:19,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:40:19,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:40:19,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:40:19,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:40:19,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:40:19,419 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:40:19,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:40:19,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:40:19,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:40:19,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:40:19,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:40:19,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:40:19,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:40:19,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:40:19,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:40:19,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:40:19,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:40:19,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:40:19,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:40:19,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:40:19,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:40:19,422 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:40:19,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:40:19,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:40:19,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:40:19,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1caf94d5755d978efe1a3e5e557e469a697b8b845c60d509025c0b6bf4eae4ae [2021-12-15 21:40:19,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:40:19,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:40:19,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:40:19,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:40:19,671 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:40:19,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum5.c [2021-12-15 21:40:19,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9f29217/b12b3929751a447ba9f226d19edcdb24/FLAG66a6ace7a [2021-12-15 21:40:20,024 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:40:20,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c [2021-12-15 21:40:20,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9f29217/b12b3929751a447ba9f226d19edcdb24/FLAG66a6ace7a [2021-12-15 21:40:20,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9f29217/b12b3929751a447ba9f226d19edcdb24 [2021-12-15 21:40:20,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:40:20,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:40:20,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:40:20,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:40:20,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:40:20,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549c5f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20, skipping insertion in model container [2021-12-15 21:40:20,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:40:20,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:40:20,625 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c[400,413] [2021-12-15 21:40:20,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:40:20,666 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:40:20,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c[400,413] [2021-12-15 21:40:20,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:40:20,713 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:40:20,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20 WrapperNode [2021-12-15 21:40:20,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:40:20,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:40:20,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:40:20,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:40:20,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,749 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2021-12-15 21:40:20,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:40:20,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:40:20,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:40:20,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:40:20,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:40:20,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:40:20,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:40:20,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:40:20,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (1/1) ... [2021-12-15 21:40:20,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:40:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:20,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:40:20,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:40:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:40:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:40:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:40:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:40:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:40:20,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:40:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:40:20,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:40:20,917 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:40:20,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:40:21,143 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:40:21,147 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:40:21,147 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-15 21:40:21,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:21 BoogieIcfgContainer [2021-12-15 21:40:21,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:40:21,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:40:21,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:40:21,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:40:21,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:20" (1/3) ... [2021-12-15 21:40:21,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a74c9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:21, skipping insertion in model container [2021-12-15 21:40:21,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:20" (2/3) ... [2021-12-15 21:40:21,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a74c9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:21, skipping insertion in model container [2021-12-15 21:40:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:21" (3/3) ... [2021-12-15 21:40:21,163 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2021-12-15 21:40:21,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:40:21,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:40:21,211 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:40:21,217 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:40:21,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:40:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:40:21,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:21,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:21,235 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-12-15 21:40:21,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:21,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862611414] [2021-12-15 21:40:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:21,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:21,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:21,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862611414] [2021-12-15 21:40:21,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862611414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:21,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:21,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:40:21,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436122615] [2021-12-15 21:40:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:21,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:40:21,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:40:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:40:21,391 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:21,410 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-12-15 21:40:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:40:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2021-12-15 21:40:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:21,417 INFO L225 Difference]: With dead ends: 83 [2021-12-15 21:40:21,417 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 21:40:21,419 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 [2021-12-15 21:40:21,423 INFO L933 BasicCegarLoop]: 55 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, 55 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 [2021-12-15 21:40:21,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 21:40:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-15 21:40:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-12-15 21:40:21,452 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-12-15 21:40:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:21,452 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-12-15 21:40:21,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-12-15 21:40:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:40:21,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:21,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:21,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:40:21,455 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-12-15 21:40:21,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:21,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690364060] [2021-12-15 21:40:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:21,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:21,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:21,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690364060] [2021-12-15 21:40:21,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690364060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:21,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:21,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:40:21,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385007765] [2021-12-15 21:40:21,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:21,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:40:21,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:40:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:40:21,544 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:21,589 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-12-15 21:40:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:40:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-12-15 21:40:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:21,591 INFO L225 Difference]: With dead ends: 75 [2021-12-15 21:40:21,591 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 21:40:21,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:40:21,592 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:21,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 21:40:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-12-15 21:40:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-12-15 21:40:21,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-12-15 21:40:21,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:21,597 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-12-15 21:40:21,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-12-15 21:40:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 21:40:21,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:21,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:21,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:40:21,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-12-15 21:40:21,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600565673] [2021-12-15 21:40:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:21,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:40:21,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:21,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600565673] [2021-12-15 21:40:21,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600565673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:21,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:21,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:40:21,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553636311] [2021-12-15 21:40:21,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:21,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:40:21,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:21,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:40:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:40:21,644 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:21,738 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-12-15 21:40:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:40:21,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 21:40:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:21,740 INFO L225 Difference]: With dead ends: 91 [2021-12-15 21:40:21,740 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 21:40:21,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:40:21,741 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:21,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 21:40:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-12-15 21:40:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-15 21:40:21,747 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-12-15 21:40:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:21,748 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-15 21:40:21,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-15 21:40:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 21:40:21,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:21,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:21,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:40:21,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-12-15 21:40:21,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883459737] [2021-12-15 21:40:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:21,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 21:40:21,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883459737] [2021-12-15 21:40:21,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883459737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094524279] [2021-12-15 21:40:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:21,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:21,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:40:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:21,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:40:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 21:40:21,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 21:40:22,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094524279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:22,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:22,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 21:40:22,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730198795] [2021-12-15 21:40:22,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:22,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:40:22,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:40:22,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:40:22,105 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:22,184 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-12-15 21:40:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:40:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 49 [2021-12-15 21:40:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:22,185 INFO L225 Difference]: With dead ends: 97 [2021-12-15 21:40:22,186 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 21:40:22,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:40:22,194 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:22,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 21:40:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-15 21:40:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 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) [2021-12-15 21:40:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-15 21:40:22,205 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-12-15 21:40:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:22,205 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-15 21:40:22,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-15 21:40:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 21:40:22,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:22,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:22,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 21:40:22,429 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 [2021-12-15 21:40:22,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-12-15 21:40:22,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118533863] [2021-12-15 21:40:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:22,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 21:40:22,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:22,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118533863] [2021-12-15 21:40:22,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118533863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292123146] [2021-12-15 21:40:22,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:40:22,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:22,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:22,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:40:22,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:40:22,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:40:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 21:40:22,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 21:40:22,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292123146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:22,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:22,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-15 21:40:22,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303264225] [2021-12-15 21:40:22,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:22,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:40:22,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:40:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:40:22,838 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:23,010 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-12-15 21:40:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:40:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 51 [2021-12-15 21:40:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:23,011 INFO L225 Difference]: With dead ends: 122 [2021-12-15 21:40:23,011 INFO L226 Difference]: Without dead ends: 82 [2021-12-15 21:40:23,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:40:23,012 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:23,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-15 21:40:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-12-15 21:40:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-15 21:40:23,017 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-12-15 21:40:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:23,017 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-15 21:40:23,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-15 21:40:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 21:40:23,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:23,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:23,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 21:40:23,228 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 [2021-12-15 21:40:23,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-12-15 21:40:23,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35294135] [2021-12-15 21:40:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:23,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:24,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:24,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35294135] [2021-12-15 21:40:24,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35294135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:24,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125557366] [2021-12-15 21:40:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:40:24,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:24,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:40:24,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:40:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:24,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-15 21:40:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:26,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:40:26,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2021-12-15 21:40:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:34,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:40:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-15 21:40:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:35,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125557366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:35,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:35,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 29] total 65 [2021-12-15 21:40:35,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704758231] [2021-12-15 21:40:35,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:35,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-15 21:40:35,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-15 21:40:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3745, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 21:40:35,507 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 65 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 65 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:38,432 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2021-12-15 21:40:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 21:40:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 65 states have internal predecessors, (205), 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 71 [2021-12-15 21:40:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:38,437 INFO L225 Difference]: With dead ends: 261 [2021-12-15 21:40:38,437 INFO L226 Difference]: Without dead ends: 256 [2021-12-15 21:40:38,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 84 SyntacticMatches, 64 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1024, Invalid=9482, Unknown=0, NotChecked=0, Total=10506 [2021-12-15 21:40:38,441 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1857 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:38,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 214 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 789 Invalid, 0 Unknown, 1857 Unchecked, 0.4s Time] [2021-12-15 21:40:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-15 21:40:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 125. [2021-12-15 21:40:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-12-15 21:40:38,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-12-15 21:40:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:38,467 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-12-15 21:40:38,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 65 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-12-15 21:40:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 21:40:38,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:38,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:38,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:38,683 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 [2021-12-15 21:40:38,683 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-12-15 21:40:38,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330303153] [2021-12-15 21:40:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:38,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:40:38,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330303153] [2021-12-15 21:40:38,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330303153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501446578] [2021-12-15 21:40:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:40:38,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:38,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:38,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:40:38,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:40:38,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:40:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:40:38,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 21:40:39,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501446578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:39,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:39,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:40:39,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047087009] [2021-12-15 21:40:39,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:39,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:40:39,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:40:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:40:39,033 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:39,298 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-12-15 21:40:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:40:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 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 73 [2021-12-15 21:40:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:39,303 INFO L225 Difference]: With dead ends: 248 [2021-12-15 21:40:39,303 INFO L226 Difference]: Without dead ends: 128 [2021-12-15 21:40:39,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:40:39,304 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:39,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 130 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:40:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-15 21:40:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-15 21:40:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-12-15 21:40:39,312 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2021-12-15 21:40:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:39,313 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-12-15 21:40:39,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-12-15 21:40:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 21:40:39,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:39,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:39,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:39,534 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 [2021-12-15 21:40:39,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2021-12-15 21:40:39,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65576386] [2021-12-15 21:40:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:39,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 21:40:39,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:39,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65576386] [2021-12-15 21:40:39,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65576386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:39,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862506365] [2021-12-15 21:40:39,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:40:39,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:39,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:39,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:39,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:40:39,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 21:40:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:40:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 21:40:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 21:40:39,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862506365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:39,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:39,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:40:39,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609964182] [2021-12-15 21:40:39,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:39,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:40:39,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:40:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:40:39,982 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:40,197 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2021-12-15 21:40:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 21:40:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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 75 [2021-12-15 21:40:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:40,198 INFO L225 Difference]: With dead ends: 209 [2021-12-15 21:40:40,198 INFO L226 Difference]: Without dead ends: 104 [2021-12-15 21:40:40,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:40:40,199 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 215 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:40,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 36 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:40:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-15 21:40:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-12-15 21:40:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 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) [2021-12-15 21:40:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-12-15 21:40:40,203 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-12-15 21:40:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:40,203 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-12-15 21:40:40,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-12-15 21:40:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 21:40:40,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:40,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:40,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:40,415 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 [2021-12-15 21:40:40,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-12-15 21:40:40,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612239027] [2021-12-15 21:40:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:40,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:43,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612239027] [2021-12-15 21:40:43,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612239027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66846741] [2021-12-15 21:40:43,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:40:43,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:43,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:43,312 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) [2021-12-15 21:40:43,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:40:43,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 21:40:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:43,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-15 21:40:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:45,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:28,956 INFO L354 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2021-12-15 21:41:28,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 152 treesize of output 263