./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/insertion_sort-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/loops/insertion_sort-1.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 25b1595a40c04d1f29f2431a3990f69b3ca92105 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:03:50,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:03:50,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:03:50,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:03:50,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:03:50,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:03:50,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:03:50,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:03:50,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:03:50,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:03:50,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:03:50,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:03:50,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:03:50,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:03:50,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:03:50,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:03:50,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:03:50,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:03:50,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:03:50,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:03:50,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:03:50,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:03:50,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:03:50,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:03:50,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:03:50,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:03:50,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:03:50,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:03:50,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:03:50,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:03:50,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:03:50,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:03:50,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:03:50,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:03:50,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:03:50,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:03:50,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:03:50,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:03:50,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:03:50,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:03:50,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:03:50,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:03:50,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:03:50,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:03:50,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:03:50,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:03:50,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:03:50,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:03:50,220 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:03:50,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:03:50,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:03:50,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:03:50,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:03:50,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:03:50,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:03:50,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:03:50,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:03:50,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25b1595a40c04d1f29f2431a3990f69b3ca92105 [2021-08-26 03:03:50,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:03:50,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:03:50,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:03:50,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:03:50,493 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:03:50,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-1.c [2021-08-26 03:03:50,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a689f32f8/4f887a8eca9e40048dc391408e00641c/FLAGa9b3b13d4 [2021-08-26 03:03:50,913 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:03:50,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c [2021-08-26 03:03:50,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a689f32f8/4f887a8eca9e40048dc391408e00641c/FLAGa9b3b13d4 [2021-08-26 03:03:50,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a689f32f8/4f887a8eca9e40048dc391408e00641c [2021-08-26 03:03:50,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:03:50,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:03:50,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:03:50,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:03:50,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:03:50,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:03:50" (1/1) ... [2021-08-26 03:03:50,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b2cb523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:50, skipping insertion in model container [2021-08-26 03:03:50,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:03:50" (1/1) ... [2021-08-26 03:03:50,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:03:50,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:03:51,016 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c[328,341] [2021-08-26 03:03:51,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:03:51,030 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:03:51,039 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c[328,341] [2021-08-26 03:03:51,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:03:51,085 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:03:51,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51 WrapperNode [2021-08-26 03:03:51,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:03:51,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:03:51,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:03:51,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:03:51,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:03:51,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:03:51,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:03:51,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:03:51,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:03:51,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:03:51,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:03:51,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:03:51,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (1/1) ... [2021-08-26 03:03:51,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:03:51,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:51,190 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) [2021-08-26 03:03:51,236 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 [2021-08-26 03:03:51,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:03:51,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:03:51,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 03:03:51,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:03:51,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:03:51,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 03:03:51,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 03:03:51,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:03:51,524 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-26 03:03:51,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:51 BoogieIcfgContainer [2021-08-26 03:03:51,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:03:51,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:03:51,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:03:51,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:03:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:03:50" (1/3) ... [2021-08-26 03:03:51,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d4bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:03:51, skipping insertion in model container [2021-08-26 03:03:51,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:51" (2/3) ... [2021-08-26 03:03:51,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d4bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:03:51, skipping insertion in model container [2021-08-26 03:03:51,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:51" (3/3) ... [2021-08-26 03:03:51,549 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-08-26 03:03:51,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:03:51,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:03:51,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:03:51,615 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 03:03:51,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:03:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2021-08-26 03:03:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:03:51,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:51,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:51,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2021-08-26 03:03:51,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:51,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454538480] [2021-08-26 03:03:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:51,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:51,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:51,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454538480] [2021-08-26 03:03:51,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454538480] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:51,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:51,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 03:03:51,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757694728] [2021-08-26 03:03:51,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:03:51,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:03:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:03:51,909 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:52,002 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-08-26 03:03:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:03:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 03:03:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:52,008 INFO L225 Difference]: With dead ends: 54 [2021-08-26 03:03:52,008 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 03:03:52,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:03:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 03:03:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-08-26 03:03:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-08-26 03:03:52,032 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2021-08-26 03:03:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:52,033 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-08-26 03:03:52,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-08-26 03:03:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 03:03:52,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:52,034 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:52,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:03:52,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2021-08-26 03:03:52,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:52,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954005848] [2021-08-26 03:03:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:52,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:52,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:52,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954005848] [2021-08-26 03:03:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954005848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:52,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392872703] [2021-08-26 03:03:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:52,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:52,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:52,216 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) [2021-08-26 03:03:52,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:03:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:52,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:03:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:03:52,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392872703] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:52,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:03:52,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-08-26 03:03:52,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294045694] [2021-08-26 03:03:52,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:03:52,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:03:52,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:03:52,474 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-08-26 03:03:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:52,537 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-08-26 03:03:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:03:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 03:03:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:52,540 INFO L225 Difference]: With dead ends: 37 [2021-08-26 03:03:52,540 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 03:03:52,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:03:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 03:03:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2021-08-26 03:03:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-08-26 03:03:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-08-26 03:03:52,548 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-08-26 03:03:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:52,548 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-08-26 03:03:52,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-08-26 03:03:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-08-26 03:03:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 03:03:52,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:52,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:52,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:52,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:52,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 188510022, now seen corresponding path program 1 times [2021-08-26 03:03:52,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:52,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239258404] [2021-08-26 03:03:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:52,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:52,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:52,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239258404] [2021-08-26 03:03:52,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239258404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:52,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518786484] [2021-08-26 03:03:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:52,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:52,933 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) [2021-08-26 03:03:52,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:03:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:03:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:53,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518786484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:53,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:53,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-26 03:03:53,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251253010] [2021-08-26 03:03:53,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:03:53,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:53,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:03:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:03:53,132 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:53,222 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-08-26 03:03:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:03:53,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 03:03:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:53,224 INFO L225 Difference]: With dead ends: 49 [2021-08-26 03:03:53,224 INFO L226 Difference]: Without dead ends: 32 [2021-08-26 03:03:53,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:03:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-26 03:03:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-08-26 03:03:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-08-26 03:03:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-26 03:03:53,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-08-26 03:03:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:53,232 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-26 03:03:53,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-26 03:03:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 03:03:53,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:53,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:53,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:53,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 03:03:53,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 2 times [2021-08-26 03:03:53,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:53,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503466957] [2021-08-26 03:03:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:53,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:53,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:53,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503466957] [2021-08-26 03:03:53,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503466957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:53,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630705521] [2021-08-26 03:03:53,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:03:53,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:53,817 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) [2021-08-26 03:03:53,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:03:53,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:03:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:03:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:03:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:54,073 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:03:54,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-08-26 03:03:54,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:03:54,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:03:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:03:54,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630705521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:54,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:54,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-08-26 03:03:54,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253895754] [2021-08-26 03:03:54,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:03:54,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:03:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:03:54,196 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2021-08-26 03:03:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:54,565 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-08-26 03:03:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 03:03:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 19 [2021-08-26 03:03:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:54,567 INFO L225 Difference]: With dead ends: 75 [2021-08-26 03:03:54,568 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 03:03:54,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-08-26 03:03:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 03:03:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-08-26 03:03:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 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) [2021-08-26 03:03:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-08-26 03:03:54,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2021-08-26 03:03:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:54,579 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-08-26 03:03:54,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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) [2021-08-26 03:03:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-08-26 03:03:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 03:03:54,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:54,580 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:54,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-26 03:03:54,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:54,794 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2021-08-26 03:03:54,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:54,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254436551] [2021-08-26 03:03:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:54,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:03:54,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:54,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254436551] [2021-08-26 03:03:54,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254436551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:54,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052899918] [2021-08-26 03:03:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:54,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:54,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:54,941 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) [2021-08-26 03:03:54,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:03:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 03:03:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:03:55,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052899918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:55,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:55,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 03:03:55,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2593261] [2021-08-26 03:03:55,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:03:55,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:03:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:03:55,142 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-08-26 03:03:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:55,243 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2021-08-26 03:03:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:03:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 23 [2021-08-26 03:03:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:55,244 INFO L225 Difference]: With dead ends: 90 [2021-08-26 03:03:55,244 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 03:03:55,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:03:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 03:03:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-08-26 03:03:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 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) [2021-08-26 03:03:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-08-26 03:03:55,248 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 23 [2021-08-26 03:03:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:55,249 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-08-26 03:03:55,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-08-26 03:03:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-08-26 03:03:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 03:03:55,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:55,249 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:55,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:55,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:55,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2021-08-26 03:03:55,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:55,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940727492] [2021-08-26 03:03:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:55,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:55,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:55,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940727492] [2021-08-26 03:03:55,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940727492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:55,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232448577] [2021-08-26 03:03:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:55,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:55,766 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) [2021-08-26 03:03:55,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:03:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:55,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:03:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:56,054 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:03:56,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:03:56,296 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-08-26 03:03:56,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-08-26 03:03:56,513 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-08-26 03:03:56,514 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 67 treesize of output 45 [2021-08-26 03:03:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:03:56,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232448577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:56,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:56,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-26 03:03:56,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898080736] [2021-08-26 03:03:56,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 03:03:56,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 03:03:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-08-26 03:03:56,540 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:57,566 INFO L93 Difference]: Finished difference Result 153 states and 192 transitions. [2021-08-26 03:03:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 03:03:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 03:03:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:57,568 INFO L225 Difference]: With dead ends: 153 [2021-08-26 03:03:57,568 INFO L226 Difference]: Without dead ends: 98 [2021-08-26 03:03:57,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 905.6ms TimeCoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 03:03:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-26 03:03:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-08-26 03:03:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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) [2021-08-26 03:03:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-08-26 03:03:57,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 24 [2021-08-26 03:03:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:57,574 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-08-26 03:03:57,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-08-26 03:03:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 03:03:57,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:57,574 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:57,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:57,781 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 3 times [2021-08-26 03:03:57,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:57,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859712149] [2021-08-26 03:03:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:57,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:58,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:58,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859712149] [2021-08-26 03:03:58,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859712149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:58,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38153776] [2021-08-26 03:03:58,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:03:58,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:58,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:58,186 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) [2021-08-26 03:03:58,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:03:58,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 03:03:58,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:03:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:03:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:58,561 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:03:58,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-08-26 03:03:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:03:58,705 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-08-26 03:03:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-08-26 03:03:58,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:03:58,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:03:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:03:58,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38153776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:58,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:58,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-26 03:03:58,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926661939] [2021-08-26 03:03:58,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 03:03:58,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 03:03:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:03:58,787 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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) [2021-08-26 03:03:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:59,310 INFO L93 Difference]: Finished difference Result 167 states and 209 transitions. [2021-08-26 03:03:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 03:03:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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 [2021-08-26 03:03:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:59,315 INFO L225 Difference]: With dead ends: 167 [2021-08-26 03:03:59,315 INFO L226 Difference]: Without dead ends: 135 [2021-08-26 03:03:59,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 589.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 03:03:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-26 03:03:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 67. [2021-08-26 03:03:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 66 states have internal predecessors, (80), 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) [2021-08-26 03:03:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-08-26 03:03:59,323 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 27 [2021-08-26 03:03:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:59,324 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-08-26 03:03:59,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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) [2021-08-26 03:03:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-08-26 03:03:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 03:03:59,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:59,325 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:59,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:59,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:59,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2021-08-26 03:03:59,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:59,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827283058] [2021-08-26 03:03:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:59,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:59,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:59,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827283058] [2021-08-26 03:03:59,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827283058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:59,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718197126] [2021-08-26 03:03:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:03:59,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:59,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:03:59,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:03:59,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:03:59,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:03:59,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:03:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:00,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 03:04:00,185 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-08-26 03:04:00,314 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:04:00,314 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 52 treesize of output 28 [2021-08-26 03:04:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:00,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718197126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:00,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:00,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2021-08-26 03:04:00,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856305319] [2021-08-26 03:04:00,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:04:00,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:04:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:04:00,342 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:00,785 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2021-08-26 03:04:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 03:04:00,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-26 03:04:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:00,786 INFO L225 Difference]: With dead ends: 180 [2021-08-26 03:04:00,786 INFO L226 Difference]: Without dead ends: 148 [2021-08-26 03:04:00,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:04:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-26 03:04:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 85. [2021-08-26 03:04:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 84 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) [2021-08-26 03:04:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2021-08-26 03:04:00,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 31 [2021-08-26 03:04:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:00,793 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2021-08-26 03:04:00,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2021-08-26 03:04:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 03:04:00,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:00,794 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:00,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:01,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:01,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2021-08-26 03:04:01,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:01,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152834124] [2021-08-26 03:04:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:01,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:01,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:01,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152834124] [2021-08-26 03:04:01,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152834124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:01,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36552761] [2021-08-26 03:04:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:01,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:01,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:01,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:01,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 03:04:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:04:01,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:01,668 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:01,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-08-26 03:04:01,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:01,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36552761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:01,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-26 03:04:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073491509] [2021-08-26 03:04:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 03:04:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 03:04:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:04:01,765 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-26 03:04:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:02,668 INFO L93 Difference]: Finished difference Result 237 states and 294 transitions. [2021-08-26 03:04:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-26 03:04:02,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 32 [2021-08-26 03:04:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:02,669 INFO L225 Difference]: With dead ends: 237 [2021-08-26 03:04:02,669 INFO L226 Difference]: Without dead ends: 205 [2021-08-26 03:04:02,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 03:04:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-26 03:04:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2021-08-26 03:04:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 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) [2021-08-26 03:04:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-08-26 03:04:02,677 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 32 [2021-08-26 03:04:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:02,677 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-08-26 03:04:02,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-08-26 03:04:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-08-26 03:04:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 03:04:02,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:02,678 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:02,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:02,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 03:04:02,892 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 2 times [2021-08-26 03:04:02,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:02,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008461613] [2021-08-26 03:04:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:02,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:03,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:03,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008461613] [2021-08-26 03:04:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008461613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:03,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291550745] [2021-08-26 03:04:03,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:04:03,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:03,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:03,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 03:04:03,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:04:03,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 03:04:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:03,633 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:03,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:03,828 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-08-26 03:04:03,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 38 [2021-08-26 03:04:04,018 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-08-26 03:04:04,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-08-26 03:04:04,149 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-26 03:04:04,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 39 [2021-08-26 03:04:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:04,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291550745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:04,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:04,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-08-26 03:04:04,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575322761] [2021-08-26 03:04:04,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 03:04:04,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 03:04:04,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:04:04,177 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 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) [2021-08-26 03:04:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:05,111 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2021-08-26 03:04:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 03:04:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 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 32 [2021-08-26 03:04:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:05,112 INFO L225 Difference]: With dead ends: 181 [2021-08-26 03:04:05,112 INFO L226 Difference]: Without dead ends: 179 [2021-08-26 03:04:05,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 03:04:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-26 03:04:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 101. [2021-08-26 03:04:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.25) internal successors, (125), 100 states have internal predecessors, (125), 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) [2021-08-26 03:04:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-08-26 03:04:05,119 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 32 [2021-08-26 03:04:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-08-26 03:04:05,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 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) [2021-08-26 03:04:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-08-26 03:04:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 03:04:05,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:05,121 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:05,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:05,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 03:04:05,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1757363551, now seen corresponding path program 3 times [2021-08-26 03:04:05,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:05,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903575146] [2021-08-26 03:04:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:05,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 03:04:05,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:05,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903575146] [2021-08-26 03:04:05,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903575146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:05,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916964577] [2021-08-26 03:04:05,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:04:05,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:05,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:05,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:05,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 03:04:05,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 03:04:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 03:04:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:05,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916964577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:05,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:05,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-26 03:04:05,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777053308] [2021-08-26 03:04:05,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 03:04:05,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 03:04:05,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:04:05,954 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:06,129 INFO L93 Difference]: Finished difference Result 290 states and 364 transitions. [2021-08-26 03:04:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 03:04:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-26 03:04:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:06,130 INFO L225 Difference]: With dead ends: 290 [2021-08-26 03:04:06,131 INFO L226 Difference]: Without dead ends: 224 [2021-08-26 03:04:06,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:04:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-26 03:04:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-08-26 03:04:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 181 states have internal predecessors, (220), 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) [2021-08-26 03:04:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 220 transitions. [2021-08-26 03:04:06,144 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 220 transitions. Word has length 35 [2021-08-26 03:04:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:06,145 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 220 transitions. [2021-08-26 03:04:06,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 220 transitions. [2021-08-26 03:04:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 03:04:06,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:06,146 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:06,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:06,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 03:04:06,357 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1000905248, now seen corresponding path program 1 times [2021-08-26 03:04:06,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:06,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184808644] [2021-08-26 03:04:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:06,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:06,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:06,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184808644] [2021-08-26 03:04:06,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184808644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:06,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016160166] [2021-08-26 03:04:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:06,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:06,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:06,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:06,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 03:04:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:04:06,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:07,082 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:07,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:07,302 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-08-26 03:04:07,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-08-26 03:04:07,418 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:04:07,418 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 54 treesize of output 30 [2021-08-26 03:04:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:07,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016160166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:07,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:07,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 26 [2021-08-26 03:04:07,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263040050] [2021-08-26 03:04:07,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 03:04:07,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 03:04:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:04:07,449 INFO L87 Difference]: Start difference. First operand 182 states and 220 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:08,521 INFO L93 Difference]: Finished difference Result 330 states and 397 transitions. [2021-08-26 03:04:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 03:04:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-26 03:04:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:08,523 INFO L225 Difference]: With dead ends: 330 [2021-08-26 03:04:08,523 INFO L226 Difference]: Without dead ends: 248 [2021-08-26 03:04:08,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 867.3ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 03:04:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-26 03:04:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2021-08-26 03:04:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 182 states have internal predecessors, (220), 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) [2021-08-26 03:04:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-08-26 03:04:08,535 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 36 [2021-08-26 03:04:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:08,537 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-08-26 03:04:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-08-26 03:04:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 03:04:08,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:08,542 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:08,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:08,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 03:04:08,753 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1716712809, now seen corresponding path program 3 times [2021-08-26 03:04:08,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:08,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846686217] [2021-08-26 03:04:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:08,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:09,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:09,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846686217] [2021-08-26 03:04:09,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846686217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:09,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986617212] [2021-08-26 03:04:09,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:04:09,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:09,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:09,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:09,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 03:04:09,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 03:04:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 03:04:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:09,512 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:09,683 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-08-26 03:04:09,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-08-26 03:04:09,819 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-08-26 03:04:09,819 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 64 treesize of output 42 [2021-08-26 03:04:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-26 03:04:09,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986617212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:09,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:09,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-26 03:04:09,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913776526] [2021-08-26 03:04:09,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 03:04:09,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 03:04:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-26 03:04:09,854 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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) [2021-08-26 03:04:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:11,715 INFO L93 Difference]: Finished difference Result 329 states and 395 transitions. [2021-08-26 03:04:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-26 03:04:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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 37 [2021-08-26 03:04:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:11,716 INFO L225 Difference]: With dead ends: 329 [2021-08-26 03:04:11,717 INFO L226 Difference]: Without dead ends: 223 [2021-08-26 03:04:11,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 1574.9ms TimeCoverageRelationStatistics Valid=905, Invalid=6405, Unknown=0, NotChecked=0, Total=7310 [2021-08-26 03:04:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-26 03:04:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 149. [2021-08-26 03:04:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 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) [2021-08-26 03:04:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-08-26 03:04:11,726 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 37 [2021-08-26 03:04:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-08-26 03:04:11,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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) [2021-08-26 03:04:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-08-26 03:04:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 03:04:11,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:11,727 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:11,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:11,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 03:04:11,933 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -336019396, now seen corresponding path program 4 times [2021-08-26 03:04:11,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:11,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160200230] [2021-08-26 03:04:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:11,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:12,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:12,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160200230] [2021-08-26 03:04:12,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160200230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:12,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615018021] [2021-08-26 03:04:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:04:12,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:12,136 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:12,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 03:04:12,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:04:12,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 03:04:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:12,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-26 03:04:12,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-08-26 03:04:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:12,825 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-08-26 03:04:12,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-08-26 03:04:12,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:12,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:12,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615018021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:12,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:12,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-26 03:04:12,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774315821] [2021-08-26 03:04:12,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 03:04:12,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 03:04:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-08-26 03:04:12,986 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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) [2021-08-26 03:04:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:13,427 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2021-08-26 03:04:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 03:04:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-26 03:04:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:13,428 INFO L225 Difference]: With dead ends: 223 [2021-08-26 03:04:13,428 INFO L226 Difference]: Without dead ends: 178 [2021-08-26 03:04:13,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:04:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-26 03:04:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2021-08-26 03:04:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.174496644295302) internal successors, (175), 149 states have internal predecessors, (175), 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) [2021-08-26 03:04:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2021-08-26 03:04:13,441 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 39 [2021-08-26 03:04:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:13,441 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2021-08-26 03:04:13,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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) [2021-08-26 03:04:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2021-08-26 03:04:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 03:04:13,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:13,442 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:13,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 03:04:13,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 03:04:13,649 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1292986487, now seen corresponding path program 1 times [2021-08-26 03:04:13,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:13,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276389185] [2021-08-26 03:04:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:13,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:14,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:14,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276389185] [2021-08-26 03:04:14,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276389185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:14,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556913003] [2021-08-26 03:04:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:14,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:14,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:14,112 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:14,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 03:04:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:14,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 03:04:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:14,646 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:14,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-08-26 03:04:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:14,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-08-26 03:04:15,133 INFO L354 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-08-26 03:04:15,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-08-26 03:04:15,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:15,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556913003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:15,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:15,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 29 [2021-08-26 03:04:15,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718393607] [2021-08-26 03:04:15,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 03:04:15,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 03:04:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-26 03:04:15,249 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-08-26 03:04:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:16,566 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2021-08-26 03:04:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 03:04:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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 40 [2021-08-26 03:04:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:16,567 INFO L225 Difference]: With dead ends: 325 [2021-08-26 03:04:16,567 INFO L226 Difference]: Without dead ends: 280 [2021-08-26 03:04:16,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1227.9ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-08-26 03:04:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-26 03:04:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 173. [2021-08-26 03:04:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 172 states have internal predecessors, (208), 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) [2021-08-26 03:04:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2021-08-26 03:04:16,579 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 40 [2021-08-26 03:04:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:16,579 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2021-08-26 03:04:16,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-08-26 03:04:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2021-08-26 03:04:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 03:04:16,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:16,580 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:16,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-26 03:04:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:16,789 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1122199553, now seen corresponding path program 2 times [2021-08-26 03:04:16,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:16,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128570943] [2021-08-26 03:04:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:16,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:17,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:17,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128570943] [2021-08-26 03:04:17,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128570943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:17,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866025521] [2021-08-26 03:04:17,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:04:17,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:17,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:17,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 03:04:17,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:04:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 03:04:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:18,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-26 03:04:18,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:18,247 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-08-26 03:04:18,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-08-26 03:04:18,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:18,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:18,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866025521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:18,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:18,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 31 [2021-08-26 03:04:18,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057121713] [2021-08-26 03:04:18,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-26 03:04:18,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:18,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-26 03:04:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-08-26 03:04:18,321 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2021-08-26 03:04:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:19,833 INFO L93 Difference]: Finished difference Result 293 states and 350 transitions. [2021-08-26 03:04:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 03:04:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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 40 [2021-08-26 03:04:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:19,834 INFO L225 Difference]: With dead ends: 293 [2021-08-26 03:04:19,834 INFO L226 Difference]: Without dead ends: 249 [2021-08-26 03:04:19,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1358.5ms TimeCoverageRelationStatistics Valid=859, Invalid=3971, Unknown=0, NotChecked=0, Total=4830 [2021-08-26 03:04:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-26 03:04:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2021-08-26 03:04:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1901840490797546) internal successors, (194), 163 states have internal predecessors, (194), 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) [2021-08-26 03:04:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2021-08-26 03:04:19,846 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 40 [2021-08-26 03:04:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:19,846 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2021-08-26 03:04:19,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2021-08-26 03:04:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2021-08-26 03:04:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 03:04:19,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:19,847 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:19,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:20,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 03:04:20,065 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1721163603, now seen corresponding path program 1 times [2021-08-26 03:04:20,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:20,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253562819] [2021-08-26 03:04:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:20,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:20,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:20,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253562819] [2021-08-26 03:04:20,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253562819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:20,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907536466] [2021-08-26 03:04:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:20,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:20,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:20,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 03:04:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 03:04:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:21,452 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-08-26 03:04:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2021-08-26 03:04:21,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-08-26 03:04:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,715 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-08-26 03:04:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 39 [2021-08-26 03:04:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:21,937 INFO L354 Elim1Store]: treesize reduction 114, result has 25.0 percent of original size [2021-08-26 03:04:21,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 59 [2021-08-26 03:04:22,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907536466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:22,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:22,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 35 [2021-08-26 03:04:22,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712315814] [2021-08-26 03:04:22,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 03:04:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 03:04:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 03:04:22,086 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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) [2021-08-26 03:04:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:23,494 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2021-08-26 03:04:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 03:04:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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 41 [2021-08-26 03:04:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:23,495 INFO L225 Difference]: With dead ends: 226 [2021-08-26 03:04:23,495 INFO L226 Difference]: Without dead ends: 198 [2021-08-26 03:04:23,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1464.7ms TimeCoverageRelationStatistics Valid=492, Invalid=3540, Unknown=0, NotChecked=0, Total=4032 [2021-08-26 03:04:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-26 03:04:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-08-26 03:04:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1761363636363635) internal successors, (207), 176 states have internal predecessors, (207), 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) [2021-08-26 03:04:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2021-08-26 03:04:23,506 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 41 [2021-08-26 03:04:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:23,506 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2021-08-26 03:04:23,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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) [2021-08-26 03:04:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2021-08-26 03:04:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 03:04:23,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:23,507 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:23,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:23,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 03:04:23,711 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash -840467502, now seen corresponding path program 5 times [2021-08-26 03:04:23,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:23,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688646140] [2021-08-26 03:04:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:23,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:23,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:23,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688646140] [2021-08-26 03:04:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688646140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:23,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380900909] [2021-08-26 03:04:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:04:23,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:23,993 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 03:04:24,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-26 03:04:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 03:04:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-26 03:04:24,848 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:24,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-26 03:04:25,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:25,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:25,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380900909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:25,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:25,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2021-08-26 03:04:25,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98943941] [2021-08-26 03:04:25,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 03:04:25,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 03:04:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:04:25,038 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) [2021-08-26 03:04:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:25,576 INFO L93 Difference]: Finished difference Result 344 states and 417 transitions. [2021-08-26 03:04:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 03:04:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) Word has length 43 [2021-08-26 03:04:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:25,577 INFO L225 Difference]: With dead ends: 344 [2021-08-26 03:04:25,578 INFO L226 Difference]: Without dead ends: 300 [2021-08-26 03:04:25,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:04:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-26 03:04:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2021-08-26 03:04:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.2) internal successors, (258), 215 states have internal predecessors, (258), 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) [2021-08-26 03:04:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2021-08-26 03:04:25,593 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 43 [2021-08-26 03:04:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:25,593 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2021-08-26 03:04:25,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) [2021-08-26 03:04:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2021-08-26 03:04:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 03:04:25,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:25,594 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:25,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:25,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 03:04:25,795 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 632000141, now seen corresponding path program 1 times [2021-08-26 03:04:25,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:25,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355559725] [2021-08-26 03:04:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:25,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:25,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:25,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355559725] [2021-08-26 03:04:25,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355559725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:25,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885264120] [2021-08-26 03:04:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:25,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:25,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:25,965 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:26,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 03:04:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:04:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:26,735 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-26 03:04:26,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-08-26 03:04:26,809 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:04:26,810 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 52 treesize of output 28 [2021-08-26 03:04:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:26,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885264120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:26,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:26,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 21 [2021-08-26 03:04:26,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964612734] [2021-08-26 03:04:26,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:04:26,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:04:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:04:26,835 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-08-26 03:04:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:27,488 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-08-26 03:04:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-26 03:04:27,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 44 [2021-08-26 03:04:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:27,489 INFO L225 Difference]: With dead ends: 366 [2021-08-26 03:04:27,489 INFO L226 Difference]: Without dead ends: 322 [2021-08-26 03:04:27,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:04:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-26 03:04:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 230. [2021-08-26 03:04:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.205240174672489) internal successors, (276), 229 states have internal predecessors, (276), 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) [2021-08-26 03:04:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 276 transitions. [2021-08-26 03:04:27,519 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 276 transitions. Word has length 44 [2021-08-26 03:04:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:27,519 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 276 transitions. [2021-08-26 03:04:27,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-08-26 03:04:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 276 transitions. [2021-08-26 03:04:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 03:04:27,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:27,520 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:27,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-26 03:04:27,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:27,725 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash 906213909, now seen corresponding path program 2 times [2021-08-26 03:04:27,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:27,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573552497] [2021-08-26 03:04:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:27,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:28,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:28,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573552497] [2021-08-26 03:04:28,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573552497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:28,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438448611] [2021-08-26 03:04:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:04:28,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:28,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:28,031 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:28,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 03:04:28,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:04:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 03:04:28,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:28,786 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:28,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2021-08-26 03:04:28,993 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-08-26 03:04:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 40 [2021-08-26 03:04:29,100 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-08-26 03:04:29,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-08-26 03:04:29,171 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:04:29,171 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 54 treesize of output 30 [2021-08-26 03:04:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:29,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438448611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:29,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:29,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 29 [2021-08-26 03:04:29,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474685834] [2021-08-26 03:04:29,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 03:04:29,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 03:04:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-08-26 03:04:29,202 INFO L87 Difference]: Start difference. First operand 230 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 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) [2021-08-26 03:04:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:30,023 INFO L93 Difference]: Finished difference Result 289 states and 344 transitions. [2021-08-26 03:04:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 03:04:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 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 44 [2021-08-26 03:04:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:30,025 INFO L225 Difference]: With dead ends: 289 [2021-08-26 03:04:30,025 INFO L226 Difference]: Without dead ends: 287 [2021-08-26 03:04:30,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2021-08-26 03:04:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-26 03:04:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 234. [2021-08-26 03:04:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.2145922746781115) internal successors, (283), 233 states have internal predecessors, (283), 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) [2021-08-26 03:04:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 283 transitions. [2021-08-26 03:04:30,041 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 283 transitions. Word has length 44 [2021-08-26 03:04:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:30,042 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 283 transitions. [2021-08-26 03:04:30,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 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) [2021-08-26 03:04:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 283 transitions. [2021-08-26 03:04:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 03:04:30,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:30,043 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:30,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:30,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:30,252 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1747430856, now seen corresponding path program 4 times [2021-08-26 03:04:30,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:30,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678270218] [2021-08-26 03:04:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:30,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:30,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:30,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678270218] [2021-08-26 03:04:30,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678270218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:30,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59008822] [2021-08-26 03:04:30,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:04:30,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:30,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:30,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:30,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 03:04:31,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:04:31,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 03:04:31,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:31,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:31,966 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-08-26 03:04:31,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-08-26 03:04:32,204 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-08-26 03:04:32,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 51 [2021-08-26 03:04:32,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:32,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2021-08-26 03:04:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:32,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59008822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:32,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:32,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-08-26 03:04:32,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722784472] [2021-08-26 03:04:32,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-26 03:04:32,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-26 03:04:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 03:04:32,306 INFO L87 Difference]: Start difference. First operand 234 states and 283 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:35,020 INFO L93 Difference]: Finished difference Result 424 states and 507 transitions. [2021-08-26 03:04:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-26 03:04:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-26 03:04:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:35,021 INFO L225 Difference]: With dead ends: 424 [2021-08-26 03:04:35,022 INFO L226 Difference]: Without dead ends: 367 [2021-08-26 03:04:35,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 2432.9ms TimeCoverageRelationStatistics Valid=1101, Invalid=8211, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 03:04:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-26 03:04:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 240. [2021-08-26 03:04:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.209205020920502) internal successors, (289), 239 states have internal predecessors, (289), 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) [2021-08-26 03:04:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 289 transitions. [2021-08-26 03:04:35,040 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 289 transitions. Word has length 45 [2021-08-26 03:04:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:35,040 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 289 transitions. [2021-08-26 03:04:35,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:04:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 289 transitions. [2021-08-26 03:04:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 03:04:35,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:35,041 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:35,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:35,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 03:04:35,245 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash 994889206, now seen corresponding path program 1 times [2021-08-26 03:04:35,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:35,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798866636] [2021-08-26 03:04:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:35,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:04:35,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:35,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798866636] [2021-08-26 03:04:35,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798866636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:35,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699085817] [2021-08-26 03:04:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:35,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:35,730 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:35,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 03:04:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 03:04:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:36,578 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:36,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:36,823 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-08-26 03:04:36,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-08-26 03:04:37,121 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-08-26 03:04:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-08-26 03:04:37,511 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-08-26 03:04:37,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-08-26 03:04:37,675 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-08-26 03:04:37,675 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 67 treesize of output 45 [2021-08-26 03:04:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-26 03:04:37,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699085817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:37,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:37,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-08-26 03:04:37,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798335466] [2021-08-26 03:04:37,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-26 03:04:37,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-26 03:04:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:04:37,701 INFO L87 Difference]: Start difference. First operand 240 states and 289 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 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) [2021-08-26 03:04:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:38,682 INFO L93 Difference]: Finished difference Result 332 states and 396 transitions. [2021-08-26 03:04:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 03:04:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 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 45 [2021-08-26 03:04:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:38,684 INFO L225 Difference]: With dead ends: 332 [2021-08-26 03:04:38,684 INFO L226 Difference]: Without dead ends: 330 [2021-08-26 03:04:38,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1108.7ms TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 03:04:38,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-26 03:04:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 259. [2021-08-26 03:04:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.2209302325581395) internal successors, (315), 258 states have internal predecessors, (315), 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) [2021-08-26 03:04:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 315 transitions. [2021-08-26 03:04:38,702 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 315 transitions. Word has length 45 [2021-08-26 03:04:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:38,702 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 315 transitions. [2021-08-26 03:04:38,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 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) [2021-08-26 03:04:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 315 transitions. [2021-08-26 03:04:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 03:04:38,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:38,703 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:38,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:38,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 03:04:38,917 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash -583456118, now seen corresponding path program 2 times [2021-08-26 03:04:38,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:38,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587412355] [2021-08-26 03:04:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:38,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:39,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:39,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587412355] [2021-08-26 03:04:39,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587412355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:39,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806504726] [2021-08-26 03:04:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:04:39,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:39,571 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:39,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 03:04:40,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:04:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 03:04:40,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:40,493 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:40,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:40,681 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-08-26 03:04:40,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 41 [2021-08-26 03:04:40,862 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-08-26 03:04:40,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 61 [2021-08-26 03:04:41,160 INFO L354 Elim1Store]: treesize reduction 363, result has 6.9 percent of original size [2021-08-26 03:04:41,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 61 [2021-08-26 03:04:41,420 INFO L354 Elim1Store]: treesize reduction 147, result has 22.6 percent of original size [2021-08-26 03:04:41,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 70 [2021-08-26 03:04:41,651 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-26 03:04:41,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 37 [2021-08-26 03:04:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:04:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806504726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:41,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:41,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2021-08-26 03:04:41,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361375230] [2021-08-26 03:04:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-26 03:04:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-26 03:04:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:04:41,687 INFO L87 Difference]: Start difference. First operand 259 states and 315 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 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) [2021-08-26 03:04:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:44,202 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2021-08-26 03:04:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:04:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 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 46 [2021-08-26 03:04:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:44,203 INFO L225 Difference]: With dead ends: 398 [2021-08-26 03:04:44,204 INFO L226 Difference]: Without dead ends: 360 [2021-08-26 03:04:44,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 2441.1ms TimeCoverageRelationStatistics Valid=834, Invalid=7356, Unknown=0, NotChecked=0, Total=8190 [2021-08-26 03:04:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-26 03:04:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 286. [2021-08-26 03:04:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.2771929824561403) internal successors, (364), 285 states have internal predecessors, (364), 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) [2021-08-26 03:04:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 364 transitions. [2021-08-26 03:04:44,224 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 364 transitions. Word has length 46 [2021-08-26 03:04:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:44,224 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 364 transitions. [2021-08-26 03:04:44,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 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) [2021-08-26 03:04:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 364 transitions. [2021-08-26 03:04:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 03:04:44,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:44,225 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:44,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:44,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:44,447 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1547861096, now seen corresponding path program 6 times [2021-08-26 03:04:44,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:44,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571505150] [2021-08-26 03:04:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:44,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-26 03:04:44,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:44,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571505150] [2021-08-26 03:04:44,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571505150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:44,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622742064] [2021-08-26 03:04:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:04:44,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:44,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:44,581 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:44,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 03:04:45,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 03:04:45,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 03:04:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-26 03:04:45,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622742064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:45,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:45,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-26 03:04:45,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560672766] [2021-08-26 03:04:45,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 03:04:45,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 03:04:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-26 03:04:45,752 INFO L87 Difference]: Start difference. First operand 286 states and 364 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 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) [2021-08-26 03:04:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:46,024 INFO L93 Difference]: Finished difference Result 745 states and 948 transitions. [2021-08-26 03:04:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 03:04:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 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 47 [2021-08-26 03:04:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:46,025 INFO L225 Difference]: With dead ends: 745 [2021-08-26 03:04:46,025 INFO L226 Difference]: Without dead ends: 584 [2021-08-26 03:04:46,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:04:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-26 03:04:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 422. [2021-08-26 03:04:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.2304038004750595) internal successors, (518), 421 states have internal predecessors, (518), 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) [2021-08-26 03:04:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 518 transitions. [2021-08-26 03:04:46,057 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 518 transitions. Word has length 47 [2021-08-26 03:04:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:46,057 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 518 transitions. [2021-08-26 03:04:46,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 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) [2021-08-26 03:04:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 518 transitions. [2021-08-26 03:04:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 03:04:46,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:46,058 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:46,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:46,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:46,261 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 972601763, now seen corresponding path program 2 times [2021-08-26 03:04:46,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:46,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077882718] [2021-08-26 03:04:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:46,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:04:46,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:46,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077882718] [2021-08-26 03:04:46,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077882718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:46,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348509220] [2021-08-26 03:04:46,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:04:46,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:46,593 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:46,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 03:04:47,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:04:47,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:47,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 03:04:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:47,813 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:47,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-08-26 03:04:47,993 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-26 03:04:47,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-08-26 03:04:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:48,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348509220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:48,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:48,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 23 [2021-08-26 03:04:48,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460787140] [2021-08-26 03:04:48,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 03:04:48,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 03:04:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-26 03:04:48,014 INFO L87 Difference]: Start difference. First operand 422 states and 518 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 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) [2021-08-26 03:04:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:48,745 INFO L93 Difference]: Finished difference Result 491 states and 604 transitions. [2021-08-26 03:04:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 03:04:48,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 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 48 [2021-08-26 03:04:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:48,746 INFO L225 Difference]: With dead ends: 491 [2021-08-26 03:04:48,746 INFO L226 Difference]: Without dead ends: 474 [2021-08-26 03:04:48,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:04:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-26 03:04:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 411. [2021-08-26 03:04:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.221951219512195) internal successors, (501), 410 states have internal predecessors, (501), 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) [2021-08-26 03:04:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 501 transitions. [2021-08-26 03:04:48,775 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 501 transitions. Word has length 48 [2021-08-26 03:04:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 501 transitions. [2021-08-26 03:04:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 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) [2021-08-26 03:04:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 501 transitions. [2021-08-26 03:04:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 03:04:48,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:48,776 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:48,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:48,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 03:04:48,990 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2023640862, now seen corresponding path program 1 times [2021-08-26 03:04:48,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:48,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794010588] [2021-08-26 03:04:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:48,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:04:49,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:49,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794010588] [2021-08-26 03:04:49,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794010588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:49,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298755407] [2021-08-26 03:04:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:49,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:49,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:49,263 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:49,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 03:04:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 03:04:50,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:50,389 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:50,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:50,594 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-08-26 03:04:50,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-08-26 03:04:50,705 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:04:50,705 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 54 treesize of output 30 [2021-08-26 03:04:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298755407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:50,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:50,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 29 [2021-08-26 03:04:50,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847519386] [2021-08-26 03:04:50,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 03:04:50,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 03:04:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-08-26 03:04:50,731 INFO L87 Difference]: Start difference. First operand 411 states and 501 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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) [2021-08-26 03:04:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:52,305 INFO L93 Difference]: Finished difference Result 567 states and 683 transitions. [2021-08-26 03:04:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:04:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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 [2021-08-26 03:04:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:52,308 INFO L225 Difference]: With dead ends: 567 [2021-08-26 03:04:52,308 INFO L226 Difference]: Without dead ends: 496 [2021-08-26 03:04:52,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1085.3ms TimeCoverageRelationStatistics Valid=659, Invalid=4891, Unknown=0, NotChecked=0, Total=5550 [2021-08-26 03:04:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-26 03:04:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 414. [2021-08-26 03:04:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.2106537530266344) internal successors, (500), 413 states have internal predecessors, (500), 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) [2021-08-26 03:04:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 500 transitions. [2021-08-26 03:04:52,338 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 500 transitions. Word has length 49 [2021-08-26 03:04:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:52,339 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 500 transitions. [2021-08-26 03:04:52,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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) [2021-08-26 03:04:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 500 transitions. [2021-08-26 03:04:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 03:04:52,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:52,340 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:52,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:52,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 03:04:52,562 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:52,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1769159842, now seen corresponding path program 3 times [2021-08-26 03:04:52,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:52,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272629880] [2021-08-26 03:04:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:52,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:04:53,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272629880] [2021-08-26 03:04:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272629880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752804271] [2021-08-26 03:04:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:04:53,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:53,362 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:53,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 03:04:54,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 03:04:54,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 03:04:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:54,531 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:54,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-08-26 03:04:54,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-08-26 03:04:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-08-26 03:04:54,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:54,863 INFO L354 Elim1Store]: treesize reduction 121, result has 8.3 percent of original size [2021-08-26 03:04:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 48 [2021-08-26 03:04:55,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:55,161 INFO L354 Elim1Store]: treesize reduction 187, result has 12.6 percent of original size [2021-08-26 03:04:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 53 [2021-08-26 03:04:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-08-26 03:04:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:55,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:55,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:04:55,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 31 [2021-08-26 03:04:55,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:04:55,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:04:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 03:04:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752804271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:55,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:55,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 38 [2021-08-26 03:04:55,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368634106] [2021-08-26 03:04:55,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 03:04:55,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 03:04:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:04:55,463 INFO L87 Difference]: Start difference. First operand 414 states and 500 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 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) [2021-08-26 03:04:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:04:57,070 INFO L93 Difference]: Finished difference Result 609 states and 742 transitions. [2021-08-26 03:04:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-26 03:04:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 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 49 [2021-08-26 03:04:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:04:57,072 INFO L225 Difference]: With dead ends: 609 [2021-08-26 03:04:57,072 INFO L226 Difference]: Without dead ends: 491 [2021-08-26 03:04:57,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1846.6ms TimeCoverageRelationStatistics Valid=607, Invalid=4363, Unknown=0, NotChecked=0, Total=4970 [2021-08-26 03:04:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-26 03:04:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 412. [2021-08-26 03:04:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.1995133819951338) internal successors, (493), 411 states have internal predecessors, (493), 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) [2021-08-26 03:04:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 493 transitions. [2021-08-26 03:04:57,103 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 493 transitions. Word has length 49 [2021-08-26 03:04:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:04:57,103 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 493 transitions. [2021-08-26 03:04:57,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 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) [2021-08-26 03:04:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 493 transitions. [2021-08-26 03:04:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-26 03:04:57,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:04:57,104 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:04:57,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 03:04:57,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 03:04:57,323 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:04:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:04:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash -184694379, now seen corresponding path program 2 times [2021-08-26 03:04:57,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:04:57,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629881468] [2021-08-26 03:04:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:04:57,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:04:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:04:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:04:57,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:04:57,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629881468] [2021-08-26 03:04:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629881468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:57,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751010393] [2021-08-26 03:04:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:04:57,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:04:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:04:57,764 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:04:57,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 03:04:58,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:04:58,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:04:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 03:04:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:04:58,961 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 03:04:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-08-26 03:04:59,138 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-08-26 03:04:59,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-08-26 03:04:59,487 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-08-26 03:04:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-08-26 03:04:59,675 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-08-26 03:04:59,676 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 67 treesize of output 45 [2021-08-26 03:04:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-26 03:04:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751010393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:04:59,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:04:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2021-08-26 03:04:59,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472502028] [2021-08-26 03:04:59,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 03:04:59,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:04:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 03:04:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:04:59,702 INFO L87 Difference]: Start difference. First operand 412 states and 493 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 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) [2021-08-26 03:05:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:05:03,783 INFO L93 Difference]: Finished difference Result 976 states and 1177 transitions. [2021-08-26 03:05:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-26 03:05:03,783 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 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 50 [2021-08-26 03:05:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:05:03,785 INFO L225 Difference]: With dead ends: 976 [2021-08-26 03:05:03,785 INFO L226 Difference]: Without dead ends: 813 [2021-08-26 03:05:03,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5699 ImplicationChecksByTransitivity, 3290.7ms TimeCoverageRelationStatistics Valid=1971, Invalid=14031, Unknown=0, NotChecked=0, Total=16002 [2021-08-26 03:05:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-08-26 03:05:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 489. [2021-08-26 03:05:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.2581967213114753) internal successors, (614), 488 states have internal predecessors, (614), 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) [2021-08-26 03:05:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 614 transitions. [2021-08-26 03:05:03,828 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 614 transitions. Word has length 50 [2021-08-26 03:05:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:05:03,828 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 614 transitions. [2021-08-26 03:05:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 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) [2021-08-26 03:05:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 614 transitions. [2021-08-26 03:05:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-26 03:05:03,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:05:03,830 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:05:03,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 03:05:04,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 03:05:04,033 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:05:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:05:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 503230019, now seen corresponding path program 7 times [2021-08-26 03:05:04,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:05:04,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324701792] [2021-08-26 03:05:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:05:04,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:05:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:05:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:05:04,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:05:04,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324701792] [2021-08-26 03:05:04,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324701792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:05:04,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444009602] [2021-08-26 03:05:04,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:05:04,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:05:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:05:04,514 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:05:04,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 03:05:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:05:05,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 03:05:05,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:05:05,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-26 03:05:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-08-26 03:05:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:06,078 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-08-26 03:05:06,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-08-26 03:05:06,259 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-26 03:05:06,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-08-26 03:05:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:05:06,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444009602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:05:06,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:05:06,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 28 [2021-08-26 03:05:06,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407206507] [2021-08-26 03:05:06,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 03:05:06,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:05:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 03:05:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-08-26 03:05:06,293 INFO L87 Difference]: Start difference. First operand 489 states and 614 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 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) [2021-08-26 03:05:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:05:07,168 INFO L93 Difference]: Finished difference Result 746 states and 933 transitions. [2021-08-26 03:05:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 03:05:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 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 [2021-08-26 03:05:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:05:07,170 INFO L225 Difference]: With dead ends: 746 [2021-08-26 03:05:07,170 INFO L226 Difference]: Without dead ends: 744 [2021-08-26 03:05:07,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 715.8ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:05:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-26 03:05:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 505. [2021-08-26 03:05:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.253968253968254) internal successors, (632), 504 states have internal predecessors, (632), 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) [2021-08-26 03:05:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 632 transitions. [2021-08-26 03:05:07,212 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 632 transitions. Word has length 51 [2021-08-26 03:05:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:05:07,212 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 632 transitions. [2021-08-26 03:05:07,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 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) [2021-08-26 03:05:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 632 transitions. [2021-08-26 03:05:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 03:05:07,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:05:07,213 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:05:07,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 03:05:07,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 03:05:07,429 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:05:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:05:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash -663049668, now seen corresponding path program 3 times [2021-08-26 03:05:07,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:05:07,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146644915] [2021-08-26 03:05:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:05:07,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:05:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:05:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:05:07,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:05:07,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146644915] [2021-08-26 03:05:07,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146644915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:05:07,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43613945] [2021-08-26 03:05:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:05:07,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:05:07,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:05:07,758 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:05:07,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 03:05:08,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 03:05:08,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:05:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 03:05:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:05:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:09,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-08-26 03:05:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:09,375 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-08-26 03:05:09,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-08-26 03:05:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:09,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:09,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:05:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-08-26 03:05:09,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:05:09,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:05:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:05:09,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43613945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:05:09,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:05:09,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-26 03:05:09,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349473914] [2021-08-26 03:05:09,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 03:05:09,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:05:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 03:05:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:05:09,741 INFO L87 Difference]: Start difference. First operand 505 states and 632 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-08-26 03:05:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:05:10,667 INFO L93 Difference]: Finished difference Result 827 states and 1053 transitions. [2021-08-26 03:05:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 03:05:10,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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 52 [2021-08-26 03:05:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:05:10,668 INFO L225 Difference]: With dead ends: 827 [2021-08-26 03:05:10,668 INFO L226 Difference]: Without dead ends: 664 [2021-08-26 03:05:10,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2021-08-26 03:05:10,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-08-26 03:05:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 531. [2021-08-26 03:05:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.2528301886792452) internal successors, (664), 530 states have internal predecessors, (664), 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) [2021-08-26 03:05:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 664 transitions. [2021-08-26 03:05:10,713 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 664 transitions. Word has length 52 [2021-08-26 03:05:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:05:10,714 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 664 transitions. [2021-08-26 03:05:10,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-08-26 03:05:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 664 transitions. [2021-08-26 03:05:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 03:05:10,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:05:10,715 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:05:10,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 03:05:10,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:05:10,929 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:05:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:05:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash -169981182, now seen corresponding path program 4 times [2021-08-26 03:05:10,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:05:10,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577298734] [2021-08-26 03:05:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:05:10,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:05:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:05:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:05:11,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:05:11,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577298734] [2021-08-26 03:05:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577298734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:05:11,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198368311] [2021-08-26 03:05:11,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:05:11,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:05:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:05:11,173 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:05:11,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 03:05:12,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:05:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:05:12,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 03:05:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:05:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-26 03:05:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:05:12,775 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-08-26 03:05:12,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-08-26 03:05:12,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:05:12,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-08-26 03:05:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 03:05:12,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198368311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:05:12,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:05:12,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-08-26 03:05:12,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949021314] [2021-08-26 03:05:12,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 03:05:12,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:05:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 03:05:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:05:12,944 INFO L87 Difference]: Start difference. First operand 531 states and 664 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-08-26 03:05:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:05:14,055 INFO L93 Difference]: Finished difference Result 918 states and 1180 transitions. [2021-08-26 03:05:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 03:05:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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 52 [2021-08-26 03:05:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:05:14,058 INFO L225 Difference]: With dead ends: 918 [2021-08-26 03:05:14,058 INFO L226 Difference]: Without dead ends: 800 [2021-08-26 03:05:14,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 841.5ms TimeCoverageRelationStatistics Valid=499, Invalid=3161, Unknown=0, NotChecked=0, Total=3660 [2021-08-26 03:05:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-26 03:05:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 648. [2021-08-26 03:05:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.276661514683153) internal successors, (826), 647 states have internal predecessors, (826), 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) [2021-08-26 03:05:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 826 transitions. [2021-08-26 03:05:14,107 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 826 transitions. Word has length 52 [2021-08-26 03:05:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:05:14,107 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 826 transitions. [2021-08-26 03:05:14,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 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) [2021-08-26 03:05:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 826 transitions. [2021-08-26 03:05:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-26 03:05:14,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:05:14,108 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:05:14,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 03:05:14,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-26 03:05:14,317 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:05:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:05:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1569114548, now seen corresponding path program 2 times [2021-08-26 03:05:14,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:05:14,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041484352] [2021-08-26 03:05:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:05:14,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:05:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:05:14,346 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:05:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:05:14,389 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:05:14,390 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:05:14,390 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:05:14,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-26 03:05:14,396 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:05:14,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:05:14 BoogieIcfgContainer [2021-08-26 03:05:14,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:05:14,440 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:05:14,440 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:05:14,440 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:05:14,441 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:51" (3/4) ... [2021-08-26 03:05:14,442 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:05:14,487 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:05:14,487 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:05:14,488 INFO L168 Benchmark]: Toolchain (without parser) took 83559.20 ms. Allocated memory was 60.8 MB in the beginning and 497.0 MB in the end (delta: 436.2 MB). Free memory was 41.1 MB in the beginning and 106.8 MB in the end (delta: -65.6 MB). Peak memory consumption was 370.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:05:14,488 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 42.5 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:05:14,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.48 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 44.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:05:14,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.21 ms. Allocated memory is still 60.8 MB. Free memory was 44.7 MB in the beginning and 43.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:05:14,489 INFO L168 Benchmark]: Boogie Preprocessor took 31.66 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 42.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:05:14,489 INFO L168 Benchmark]: RCFGBuilder took 370.46 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 42.0 MB in the beginning and 58.2 MB in the end (delta: -16.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:05:14,490 INFO L168 Benchmark]: TraceAbstraction took 82895.03 ms. Allocated memory was 77.6 MB in the beginning and 497.0 MB in the end (delta: 419.4 MB). Free memory was 57.9 MB in the beginning and 110.9 MB in the end (delta: -53.1 MB). Peak memory consumption was 366.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:05:14,490 INFO L168 Benchmark]: Witness Printer took 47.41 ms. Allocated memory is still 497.0 MB. Free memory was 110.9 MB in the beginning and 106.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:05:14,492 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 42.5 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.48 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 44.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.21 ms. Allocated memory is still 60.8 MB. Free memory was 44.7 MB in the beginning and 43.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.66 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 42.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 370.46 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 42.0 MB in the beginning and 58.2 MB in the end (delta: -16.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 82895.03 ms. Allocated memory was 77.6 MB in the beginning and 497.0 MB in the end (delta: 419.4 MB). Free memory was 57.9 MB in the beginning and 110.9 MB in the end (delta: -53.1 MB). Peak memory consumption was 366.1 MB. Max. memory is 16.1 GB. * Witness Printer took 47.41 ms. Allocated memory is still 497.0 MB. Free memory was 110.9 MB in the beginning and 106.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j