./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s12if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s12if.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 967212eaab4ee70dc7d11c1f4edf607d989bdf53 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s12if.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 967212eaab4ee70dc7d11c1f4edf607d989bdf53 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 02:27:55,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 02:27:55,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 02:27:55,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 02:27:55,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 02:27:55,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 02:27:55,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 02:27:55,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 02:27:55,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 02:27:55,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 02:27:55,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 02:27:55,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 02:27:55,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 02:27:55,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 02:27:55,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 02:27:55,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 02:27:55,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 02:27:55,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 02:27:55,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 02:27:55,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 02:27:55,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 02:27:55,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 02:27:55,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 02:27:55,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 02:27:55,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 02:27:55,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 02:27:55,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 02:27:55,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 02:27:55,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 02:27:55,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 02:27:55,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 02:27:55,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 02:27:55,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 02:27:55,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 02:27:55,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 02:27:55,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 02:27:55,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 02:27:55,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 02:27:55,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 02:27:55,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 02:27:55,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 02:27:55,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 02:27:55,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 02:27:55,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 02:27:55,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 02:27:55,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 02:27:55,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 02:27:55,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 02:27:55,126 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 02:27:55,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 02:27:55,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 02:27:55,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 02:27:55,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 02:27:55,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 02:27:55,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 02:27:55,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 02:27:55,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 02:27:55,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 02:27:55,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 02:27:55,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 02:27:55,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 02:27:55,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 02:27:55,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 02:27:55,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 02:27:55,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 02:27:55,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 02:27:55,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 967212eaab4ee70dc7d11c1f4edf607d989bdf53 [2021-08-29 02:27:55,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 02:27:55,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 02:27:55,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 02:27:55,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 02:27:55,431 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 02:27:55,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s12if.c [2021-08-29 02:27:55,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d8dbb03/03eb9f2cd098436eac02f8623712f5fc/FLAGe42b80b41 [2021-08-29 02:27:55,863 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 02:27:55,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s12if.c [2021-08-29 02:27:55,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d8dbb03/03eb9f2cd098436eac02f8623712f5fc/FLAGe42b80b41 [2021-08-29 02:27:55,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d8dbb03/03eb9f2cd098436eac02f8623712f5fc [2021-08-29 02:27:55,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 02:27:55,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 02:27:55,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 02:27:55,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 02:27:55,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 02:27:55,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:27:55" (1/1) ... [2021-08-29 02:27:55,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650e62be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:55, skipping insertion in model container [2021-08-29 02:27:55,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:27:55" (1/1) ... [2021-08-29 02:27:55,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 02:27:55,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 02:27:56,006 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/array-fpi/s12if.c[588,601] [2021-08-29 02:27:56,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 02:27:56,040 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 02:27:56,076 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/array-fpi/s12if.c[588,601] [2021-08-29 02:27:56,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 02:27:56,114 INFO L208 MainTranslator]: Completed translation [2021-08-29 02:27:56,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56 WrapperNode [2021-08-29 02:27:56,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 02:27:56,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 02:27:56,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 02:27:56,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 02:27:56,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 02:27:56,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 02:27:56,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 02:27:56,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 02:27:56,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 02:27:56,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 02:27:56,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 02:27:56,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 02:27:56,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (1/1) ... [2021-08-29 02:27:56,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 02:27:56,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:27:56,218 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) [2021-08-29 02:27:56,242 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 [2021-08-29 02:27:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 02:27:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 02:27:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 02:27:56,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 02:27:56,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 02:27:56,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 02:27:56,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 02:27:56,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 02:27:56,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 02:27:56,435 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 02:27:56,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:27:56 BoogieIcfgContainer [2021-08-29 02:27:56,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 02:27:56,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 02:27:56,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 02:27:56,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 02:27:56,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:27:55" (1/3) ... [2021-08-29 02:27:56,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fc5659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:27:56, skipping insertion in model container [2021-08-29 02:27:56,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:27:56" (2/3) ... [2021-08-29 02:27:56,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fc5659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:27:56, skipping insertion in model container [2021-08-29 02:27:56,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:27:56" (3/3) ... [2021-08-29 02:27:56,441 INFO L111 eAbstractionObserver]: Analyzing ICFG s12if.c [2021-08-29 02:27:56,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 02:27:56,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 02:27:56,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 02:27:56,490 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 [2021-08-29 02:27:56,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 02:27:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:27:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 02:27:56,503 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:27:56,503 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:27:56,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:27:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:27:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-08-29 02:27:56,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:27:56,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483055656] [2021-08-29 02:27:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:27:56,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:27:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:27:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:27:56,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:27:56,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483055656] [2021-08-29 02:27:56,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483055656] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 02:27:56,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:27:56,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 02:27:56,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709754213] [2021-08-29 02:27:56,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 02:27:56,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:27:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 02:27:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 02:27:56,661 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:27:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:27:56,737 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-08-29 02:27:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 02:27:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 02:27:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:27:56,744 INFO L225 Difference]: With dead ends: 42 [2021-08-29 02:27:56,744 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 02:27:56,746 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 02:27:56,749 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.20ms IncrementalHoareTripleChecker+Time [2021-08-29 02:27:56,749 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.26ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 66.20ms Time] [2021-08-29 02:27:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 02:27:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 02:27:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:27:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-08-29 02:27:56,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-08-29 02:27:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:27:56,776 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-08-29 02:27:56,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:27:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-08-29 02:27:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 02:27:56,777 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:27:56,778 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:27:56,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 02:27:56,781 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:27:56,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:27:56,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-08-29 02:27:56,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:27:56,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139242729] [2021-08-29 02:27:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:27:56,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:27:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:27:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:27:56,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:27:56,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139242729] [2021-08-29 02:27:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139242729] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 02:27:56,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:27:56,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 02:27:56,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889874669] [2021-08-29 02:27:56,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 02:27:56,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:27:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 02:27:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 02:27:56,848 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:27:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:27:56,894 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-08-29 02:27:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 02:27:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 02:27:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:27:56,895 INFO L225 Difference]: With dead ends: 39 [2021-08-29 02:27:56,895 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 02:27:56,895 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.68ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 02:27:56,896 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.52ms IncrementalHoareTripleChecker+Time [2021-08-29 02:27:56,897 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 38.52ms Time] [2021-08-29 02:27:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 02:27:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-08-29 02:27:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-08-29 02:27:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-08-29 02:27:56,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-08-29 02:27:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:27:56,903 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-08-29 02:27:56,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:27:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-08-29 02:27:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:27:56,906 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:27:56,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:27:56,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 02:27:56,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:27:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:27:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-08-29 02:27:56,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:27:56,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436106122] [2021-08-29 02:27:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:27:56,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:27:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:27:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:27:57,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:27:57,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436106122] [2021-08-29 02:27:57,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436106122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:27:57,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979959833] [2021-08-29 02:27:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:27:57,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:27:57,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:27:57,383 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) [2021-08-29 02:27:57,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 02:27:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:27:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-29 02:27:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:27:57,514 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 11 treesize of output 7 [2021-08-29 02:27:57,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-08-29 02:27:57,576 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 23 treesize of output 22 [2021-08-29 02:27:57,856 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-08-29 02:27:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 66 [2021-08-29 02:27:58,542 INFO L354 Elim1Store]: treesize reduction 210, result has 13.9 percent of original size [2021-08-29 02:27:58,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 84 [2021-08-29 02:28:01,194 INFO L354 Elim1Store]: treesize reduction 60, result has 38.1 percent of original size [2021-08-29 02:28:01,194 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 103 treesize of output 95 [2021-08-29 02:28:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:28:01,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:19,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:28:19,169 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 846 treesize of output 678 [2021-08-29 02:28:19,179 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 02:28:19,180 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 678 treesize of output 632 [2021-08-29 02:28:19,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:28:19,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2177 treesize of output 1959 [2021-08-29 02:28:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 1515 treesize of output 1513 [2021-08-29 02:28:19,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 751 treesize of output 749 [2021-08-29 02:28:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:28:19,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979959833] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:19,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:28:19,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2021-08-29 02:28:19,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983068700] [2021-08-29 02:28:19,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-29 02:28:19,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-29 02:28:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=465, Unknown=7, NotChecked=0, Total=600 [2021-08-29 02:28:19,494 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:19,662 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-08-29 02:28:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 02:28:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 02:28:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:19,664 INFO L225 Difference]: With dead ends: 47 [2021-08-29 02:28:19,664 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 02:28:19,664 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 18190.21ms TimeCoverageRelationStatistics Valid=159, Invalid=590, Unknown=7, NotChecked=0, Total=756 [2021-08-29 02:28:19,665 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 38.43ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:19,665 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 53 Unchecked, 38.43ms Time] [2021-08-29 02:28:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 02:28:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-08-29 02:28:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-08-29 02:28:19,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2021-08-29 02:28:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:19,672 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-08-29 02:28:19,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-08-29 02:28:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:28:19,673 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:19,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:19,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:19,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:19,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-08-29 02:28:19,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:19,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31472506] [2021-08-29 02:28:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:19,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:19,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 02:28:19,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516267999] [2021-08-29 02:28:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:19,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:19,902 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) [2021-08-29 02:28:19,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 02:28:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:19,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 02:28:19,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:19,974 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 25 treesize of output 13 [2021-08-29 02:28:20,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-08-29 02:28:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:20,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:20,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 31 [2021-08-29 02:28:20,081 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-29 02:28:20,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 30 [2021-08-29 02:28:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:20,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:20,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31472506] [2021-08-29 02:28:20,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:28:20,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516267999] [2021-08-29 02:28:20,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516267999] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:20,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:28:20,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-29 02:28:20,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655041161] [2021-08-29 02:28:20,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 02:28:20,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 02:28:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-29 02:28:20,105 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:20,286 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2021-08-29 02:28:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 02:28:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 02:28:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:20,287 INFO L225 Difference]: With dead ends: 59 [2021-08-29 02:28:20,287 INFO L226 Difference]: Without dead ends: 52 [2021-08-29 02:28:20,287 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 94.94ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-29 02:28:20,288 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.02ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:20,288 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 220 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [26 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 126.02ms Time] [2021-08-29 02:28:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-29 02:28:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-08-29 02:28:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-08-29 02:28:20,292 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 21 [2021-08-29 02:28:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:20,292 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-08-29 02:28:20,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-08-29 02:28:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:28:20,293 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:20,293 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:20,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-29 02:28:20,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1649883961, now seen corresponding path program 1 times [2021-08-29 02:28:20,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:20,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029601437] [2021-08-29 02:28:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:20,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:20,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:20,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029601437] [2021-08-29 02:28:20,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029601437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:20,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111165411] [2021-08-29 02:28:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:20,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:20,617 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) [2021-08-29 02:28:20,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 02:28:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:20,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 02:28:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:20,677 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 11 treesize of output 7 [2021-08-29 02:28:20,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-08-29 02:28:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:20,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 14 treesize of output 12 [2021-08-29 02:28:20,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 22 treesize of output 20 [2021-08-29 02:28:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111165411] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:20,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:28:20,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-08-29 02:28:20,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575287736] [2021-08-29 02:28:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 02:28:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 02:28:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-29 02:28:20,786 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:20,872 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-08-29 02:28:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 02:28:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 02:28:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:20,873 INFO L225 Difference]: With dead ends: 58 [2021-08-29 02:28:20,873 INFO L226 Difference]: Without dead ends: 46 [2021-08-29 02:28:20,874 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.74ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-29 02:28:20,874 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.85ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:20,874 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 64.85ms Time] [2021-08-29 02:28:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-29 02:28:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-29 02:28:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 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) [2021-08-29 02:28:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-08-29 02:28:20,878 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 21 [2021-08-29 02:28:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:20,879 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-08-29 02:28:20,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-08-29 02:28:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 02:28:20,879 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:20,879 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:20,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:21,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:21,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-08-29 02:28:21,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:21,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473813888] [2021-08-29 02:28:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:21,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:21,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:21,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473813888] [2021-08-29 02:28:21,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473813888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:21,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202163897] [2021-08-29 02:28:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:28:21,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:21,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:21,143 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) [2021-08-29 02:28:21,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 02:28:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 02:28:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:28:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 02:28:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:21,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:21,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202163897] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:21,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:28:21,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-29 02:28:21,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496907462] [2021-08-29 02:28:21,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 02:28:21,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 02:28:21,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:28:21,324 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:21,482 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2021-08-29 02:28:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 02:28:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 02:28:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:21,483 INFO L225 Difference]: With dead ends: 69 [2021-08-29 02:28:21,483 INFO L226 Difference]: Without dead ends: 59 [2021-08-29 02:28:21,483 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 76.50ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-29 02:28:21,484 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.92ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:21,484 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [30 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 122.92ms Time] [2021-08-29 02:28:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-29 02:28:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-08-29 02:28:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-08-29 02:28:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-08-29 02:28:21,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-08-29 02:28:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:21,488 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-08-29 02:28:21,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-08-29 02:28:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 02:28:21,489 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:21,489 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:21,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:21,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:21,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-08-29 02:28:21,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:21,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036594082] [2021-08-29 02:28:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:21,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:21,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036594082] [2021-08-29 02:28:21,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036594082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904937374] [2021-08-29 02:28:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 02:28:21,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:21,766 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) [2021-08-29 02:28:21,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 02:28:21,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-29 02:28:21,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:28:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 02:28:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:21,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:28:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904937374] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:21,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:28:21,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-29 02:28:21,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266953714] [2021-08-29 02:28:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 02:28:21,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:21,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 02:28:21,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:28:21,904 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:22,011 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-08-29 02:28:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 02:28:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-08-29 02:28:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:22,012 INFO L225 Difference]: With dead ends: 73 [2021-08-29 02:28:22,012 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 02:28:22,013 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.50ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-29 02:28:22,013 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.09ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:22,013 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 87.09ms Time] [2021-08-29 02:28:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 02:28:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-29 02:28:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-08-29 02:28:22,017 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2021-08-29 02:28:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:22,017 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-08-29 02:28:22,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-08-29 02:28:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 02:28:22,017 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:22,017 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:22,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:22,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:22,218 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-08-29 02:28:22,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:22,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461733192] [2021-08-29 02:28:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:22,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 02:28:22,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:22,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461733192] [2021-08-29 02:28:22,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461733192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:22,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529642263] [2021-08-29 02:28:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 02:28:22,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:22,569 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) [2021-08-29 02:28:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 02:28:22,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 02:28:22,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:28:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-29 02:28:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:22,617 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 11 treesize of output 7 [2021-08-29 02:28:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:28:22,648 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 23 treesize of output 22 [2021-08-29 02:28:22,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:28:22,731 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-08-29 02:28:22,732 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-08-29 02:28:22,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:28:22,924 INFO L354 Elim1Store]: treesize reduction 62, result has 44.1 percent of original size [2021-08-29 02:28:22,924 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 5 case distinctions, treesize of input 49 treesize of output 78 [2021-08-29 02:28:23,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:28:23,329 INFO L354 Elim1Store]: treesize reduction 122, result has 39.6 percent of original size [2021-08-29 02:28:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 141 [2021-08-29 02:28:24,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 02:28:24,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-29 02:28:24,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-08-29 02:28:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683637524] [2021-08-29 02:28:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 02:28:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 02:28:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-29 02:28:24,733 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:25,427 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-08-29 02:28:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-29 02:28:25,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-29 02:28:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:25,428 INFO L225 Difference]: With dead ends: 86 [2021-08-29 02:28:25,428 INFO L226 Difference]: Without dead ends: 82 [2021-08-29 02:28:25,428 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1004.92ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 02:28:25,429 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.94ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:25,429 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 562 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [69 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 318.94ms Time] [2021-08-29 02:28:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-29 02:28:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-08-29 02:28:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-08-29 02:28:25,436 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2021-08-29 02:28:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:25,437 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-08-29 02:28:25,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-08-29 02:28:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 02:28:25,437 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:25,438 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:25,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:25,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:25,638 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-08-29 02:28:25,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:25,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880702617] [2021-08-29 02:28:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:25,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:25,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 02:28:25,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510815572] [2021-08-29 02:28:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:25,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:25,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:25,656 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) [2021-08-29 02:28:25,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 02:28:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:25,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-29 02:28:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:25,766 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 31 treesize of output 15 [2021-08-29 02:28:25,835 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-08-29 02:28:25,835 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 5 case distinctions, treesize of input 40 treesize of output 38 [2021-08-29 02:28:25,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2021-08-29 02:28:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 02:28:25,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:27,629 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| Int)) (= (let ((.cse1 (* c_ULTIMATE.start_main_~i~0 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (+ (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse1)))))) c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset 4 .cse1))) 2)) is different from false [2021-08-29 02:28:28,610 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| (+ (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))))) c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset 4)) 2)) is different from false [2021-08-29 02:28:28,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:28:28,656 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 574 treesize of output 524 [2021-08-29 02:28:29,464 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-08-29 02:28:29,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 73 treesize of output 69 [2021-08-29 02:28:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2021-08-29 02:28:29,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:29,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880702617] [2021-08-29 02:28:29,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:28:29,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510815572] [2021-08-29 02:28:29,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510815572] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:29,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:28:29,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-29 02:28:29,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298286319] [2021-08-29 02:28:29,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-29 02:28:29,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-29 02:28:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=217, Unknown=2, NotChecked=62, Total=342 [2021-08-29 02:28:29,559 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2021-08-29 02:28:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:29,795 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2021-08-29 02:28:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 02:28:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 29 [2021-08-29 02:28:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:29,796 INFO L225 Difference]: With dead ends: 113 [2021-08-29 02:28:29,796 INFO L226 Difference]: Without dead ends: 106 [2021-08-29 02:28:29,797 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2862.51ms TimeCoverageRelationStatistics Valid=81, Invalid=267, Unknown=2, NotChecked=70, Total=420 [2021-08-29 02:28:29,797 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 177.17ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:29,797 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 517 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [36 Valid, 358 Invalid, 0 Unknown, 123 Unchecked, 177.17ms Time] [2021-08-29 02:28:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-29 02:28:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-08-29 02:28:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-08-29 02:28:29,805 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 29 [2021-08-29 02:28:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:29,805 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-08-29 02:28:29,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2021-08-29 02:28:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-08-29 02:28:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 02:28:29,806 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:29,806 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:29,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:30,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:30,009 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2021-08-29 02:28:30,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:30,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164155852] [2021-08-29 02:28:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:30,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:30,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 02:28:30,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313149508] [2021-08-29 02:28:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:30,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:30,026 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) [2021-08-29 02:28:30,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 02:28:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:30,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 02:28:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:30,084 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 [2021-08-29 02:28:30,122 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-08-29 02:28:30,122 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 35 treesize of output 26 [2021-08-29 02:28:30,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2021-08-29 02:28:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:30,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 16 treesize of output 14 [2021-08-29 02:28:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 28 treesize of output 24 [2021-08-29 02:28:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:30,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:30,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164155852] [2021-08-29 02:28:30,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:28:30,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313149508] [2021-08-29 02:28:30,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313149508] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:30,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:28:30,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-29 02:28:30,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265013300] [2021-08-29 02:28:30,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 02:28:30,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 02:28:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-29 02:28:30,244 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:30,409 INFO L93 Difference]: Finished difference Result 123 states and 158 transitions. [2021-08-29 02:28:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 02:28:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-29 02:28:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:30,410 INFO L225 Difference]: With dead ends: 123 [2021-08-29 02:28:30,410 INFO L226 Difference]: Without dead ends: 92 [2021-08-29 02:28:30,411 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 62.77ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-29 02:28:30,411 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.37ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:30,411 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [12 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 136.37ms Time] [2021-08-29 02:28:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-29 02:28:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-08-29 02:28:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-08-29 02:28:30,417 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 29 [2021-08-29 02:28:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:30,418 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-08-29 02:28:30,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-08-29 02:28:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 02:28:30,418 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:30,418 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:30,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:30,628 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,SelfDestructingSolverStorable9 [2021-08-29 02:28:30,629 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2021-08-29 02:28:30,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:30,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127645645] [2021-08-29 02:28:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:30,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:30,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:30,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127645645] [2021-08-29 02:28:30,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127645645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:30,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858830909] [2021-08-29 02:28:30,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 02:28:30,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:30,694 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) [2021-08-29 02:28:30,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 02:28:30,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-29 02:28:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:28:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 02:28:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:30,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858830909] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:30,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:28:30,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-08-29 02:28:30,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742469473] [2021-08-29 02:28:30,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 02:28:30,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 02:28:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-29 02:28:30,900 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:31,129 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2021-08-29 02:28:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 02:28:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-08-29 02:28:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:31,130 INFO L225 Difference]: With dead ends: 115 [2021-08-29 02:28:31,130 INFO L226 Difference]: Without dead ends: 102 [2021-08-29 02:28:31,130 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 111.53ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-08-29 02:28:31,131 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.31ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:31,131 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [28 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 175.31ms Time] [2021-08-29 02:28:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-29 02:28:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-08-29 02:28:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-08-29 02:28:31,137 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 31 [2021-08-29 02:28:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:31,137 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-08-29 02:28:31,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-08-29 02:28:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 02:28:31,138 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:31,138 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:31,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:31,345 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2021-08-29 02:28:31,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:31,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038690771] [2021-08-29 02:28:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:31,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:31,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:31,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038690771] [2021-08-29 02:28:31,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038690771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:31,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037318257] [2021-08-29 02:28:31,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 02:28:31,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:31,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:31,405 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) [2021-08-29 02:28:31,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 02:28:31,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-29 02:28:31,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:28:31,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 02:28:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:31,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:28:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 02:28:31,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037318257] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:28:31,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:28:31,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-08-29 02:28:31,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611075690] [2021-08-29 02:28:31,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 02:28:31,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 02:28:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-29 02:28:31,622 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2021-08-29 02:28:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:31,770 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-08-29 02:28:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 02:28:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 32 [2021-08-29 02:28:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:31,771 INFO L225 Difference]: With dead ends: 103 [2021-08-29 02:28:31,771 INFO L226 Difference]: Without dead ends: 50 [2021-08-29 02:28:31,771 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 80.78ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-29 02:28:31,771 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.65ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:31,772 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [37 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 118.65ms Time] [2021-08-29 02:28:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-29 02:28:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-29 02:28:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 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) [2021-08-29 02:28:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-08-29 02:28:31,775 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 32 [2021-08-29 02:28:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:31,775 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-08-29 02:28:31,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2021-08-29 02:28:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-08-29 02:28:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-29 02:28:31,776 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:31,776 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:31,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:31,976 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,SelfDestructingSolverStorable11 [2021-08-29 02:28:31,976 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2021-08-29 02:28:31,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:31,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140492] [2021-08-29 02:28:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:31,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 02:28:32,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:28:32,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140492] [2021-08-29 02:28:32,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:28:32,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740847663] [2021-08-29 02:28:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 02:28:32,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:32,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:32,395 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) [2021-08-29 02:28:32,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 02:28:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:28:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-29 02:28:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:32,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-08-29 02:28:32,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-29 02:28:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:28:32,454 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 23 treesize of output 22 [2021-08-29 02:28:32,520 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-08-29 02:28:32,520 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-08-29 02:28:32,640 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-08-29 02:28:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-08-29 02:28:32,875 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-08-29 02:28:32,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 58 treesize of output 106 [2021-08-29 02:28:33,503 INFO L354 Elim1Store]: treesize reduction 188, result has 35.8 percent of original size [2021-08-29 02:28:33,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 130 treesize of output 185 [2021-08-29 02:28:39,108 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-08-29 02:28:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 238 treesize of output 178 [2021-08-29 02:28:48,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 02:28:48,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-29 02:28:48,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-08-29 02:28:48,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925310882] [2021-08-29 02:28:48,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-29 02:28:48,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:28:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-29 02:28:48,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-29 02:28:48,142 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:28:49,277 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2021-08-29 02:28:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-29 02:28:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-08-29 02:28:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:28:49,278 INFO L225 Difference]: With dead ends: 112 [2021-08-29 02:28:49,278 INFO L226 Difference]: Without dead ends: 108 [2021-08-29 02:28:49,279 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1564.39ms TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2021-08-29 02:28:49,279 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 474.24ms IncrementalHoareTripleChecker+Time [2021-08-29 02:28:49,279 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 932 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [117 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 474.24ms Time] [2021-08-29 02:28:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-29 02:28:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 87. [2021-08-29 02:28:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-08-29 02:28:49,285 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 37 [2021-08-29 02:28:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:28:49,286 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-08-29 02:28:49,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:28:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-08-29 02:28:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-29 02:28:49,287 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:28:49,287 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:28:49,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 02:28:49,488 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,SelfDestructingSolverStorable12 [2021-08-29 02:28:49,489 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:28:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:28:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1441037607, now seen corresponding path program 2 times [2021-08-29 02:28:49,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:28:49,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345052332] [2021-08-29 02:28:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:28:49,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:28:49,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 02:28:49,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728595958] [2021-08-29 02:28:49,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:28:49,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:28:49,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:28:49,501 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) [2021-08-29 02:28:49,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-29 02:28:49,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 02:28:49,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:28:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-29 02:28:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:28:49,694 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 31 treesize of output 15 [2021-08-29 02:28:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:28:49,761 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-29 02:28:49,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-08-29 02:28:49,828 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-08-29 02:28:49,829 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 5 case distinctions, treesize of input 40 treesize of output 38 [2021-08-29 02:28:49,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:28:49,876 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 21 treesize of output 21 [2021-08-29 02:28:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:28:49,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:29:16,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:29:16,486 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 1172 treesize of output 1066 [2021-08-29 02:29:19,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:29:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 278 treesize of output 278 [2021-08-29 02:29:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:29:22,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:29:22,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345052332] [2021-08-29 02:29:22,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:29:22,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728595958] [2021-08-29 02:29:22,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728595958] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:29:22,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:29:22,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-29 02:29:22,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702891488] [2021-08-29 02:29:22,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-29 02:29:22,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:29:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-29 02:29:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=975, Unknown=16, NotChecked=0, Total=1190 [2021-08-29 02:29:22,602 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2021-08-29 02:29:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:29:23,249 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-08-29 02:29:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 02:29:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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 37 [2021-08-29 02:29:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:29:23,250 INFO L225 Difference]: With dead ends: 143 [2021-08-29 02:29:23,250 INFO L226 Difference]: Without dead ends: 136 [2021-08-29 02:29:23,251 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 28568.17ms TimeCoverageRelationStatistics Valid=385, Invalid=1579, Unknown=16, NotChecked=0, Total=1980 [2021-08-29 02:29:23,251 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 282 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 321.48ms IncrementalHoareTripleChecker+Time [2021-08-29 02:29:23,252 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 0 Invalid, 930 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [199 Valid, 420 Invalid, 0 Unknown, 311 Unchecked, 321.48ms Time] [2021-08-29 02:29:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-29 02:29:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-08-29 02:29:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 110 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2021-08-29 02:29:23,259 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 37 [2021-08-29 02:29:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:29:23,259 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2021-08-29 02:29:23,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2021-08-29 02:29:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2021-08-29 02:29:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-29 02:29:23,260 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:29:23,260 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:29:23,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-29 02:29:23,472 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,SelfDestructingSolverStorable13 [2021-08-29 02:29:23,473 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:29:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:29:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2063837675, now seen corresponding path program 3 times [2021-08-29 02:29:23,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:29:23,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702055013] [2021-08-29 02:29:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:29:23,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:29:23,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 02:29:23,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040698259] [2021-08-29 02:29:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 02:29:23,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:29:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:29:23,486 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) [2021-08-29 02:29:23,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-29 02:29:23,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 02:29:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:29:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-29 02:29:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:29:23,602 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 37 treesize of output 17 [2021-08-29 02:29:23,663 INFO L354 Elim1Store]: treesize reduction 59, result has 16.9 percent of original size [2021-08-29 02:29:23,664 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 38 treesize of output 29 [2021-08-29 02:29:23,788 INFO L354 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2021-08-29 02:29:23,789 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 5 case distinctions, treesize of input 51 treesize of output 49 [2021-08-29 02:29:23,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:29:23,829 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 32 treesize of output 32 [2021-08-29 02:29:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-29 02:29:23,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:29:50,237 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~i~0_144 Int) (v_ULTIMATE.start_main_~i~0_147 Int) (|ULTIMATE.start_main_~#sum~0.offset| Int)) (or (= 2 (select (select (let ((.cse2 (let ((.cse3 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse4 (+ c_ULTIMATE.start_main_~a~0.offset (* c_ULTIMATE.start_main_~i~0 4)))) (store .cse3 .cse4 (+ (select .cse3 .cse4) 1))))) (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse2))) (store .cse0 |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse1 |ULTIMATE.start_main_~#sum~0.offset| (+ (select .cse1 |ULTIMATE.start_main_~#sum~0.offset|) (select .cse2 (+ c_ULTIMATE.start_main_~a~0.offset (* v_ULTIMATE.start_main_~i~0_147 4))))))))) c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset (* v_ULTIMATE.start_main_~i~0_144 4)))) (<= (+ v_ULTIMATE.start_main_~i~0_144 2) c_ULTIMATE.start_main_~i~0) (< c_ULTIMATE.start_main_~i~0 (+ v_ULTIMATE.start_main_~i~0_144 1)))) is different from false [2021-08-29 02:29:51,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~i~0_144 Int) (v_ULTIMATE.start_main_~i~0_147 Int) (|ULTIMATE.start_main_~#sum~0.offset| Int)) (or (<= (+ v_ULTIMATE.start_main_~i~0_144 1) c_ULTIMATE.start_main_~i~0) (= (select (select (let ((.cse2 (let ((.cse3 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse4 (+ c_ULTIMATE.start_main_~a~0.offset 4 (* c_ULTIMATE.start_main_~i~0 4)))) (store .cse3 .cse4 (+ (select .cse3 .cse4) 1))))) (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse2))) (store .cse0 |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0.base|))) (store .cse1 |ULTIMATE.start_main_~#sum~0.offset| (+ (select .cse2 (+ c_ULTIMATE.start_main_~a~0.offset (* v_ULTIMATE.start_main_~i~0_147 4))) (select .cse1 |ULTIMATE.start_main_~#sum~0.offset|))))))) c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset (* v_ULTIMATE.start_main_~i~0_144 4))) 2) (< c_ULTIMATE.start_main_~i~0 v_ULTIMATE.start_main_~i~0_144))) is different from false [2021-08-29 02:29:51,822 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-29 02:29:51,822 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 14802 treesize of output 13348 [2021-08-29 02:29:51,899 INFO L354 Elim1Store]: treesize reduction 114, result has 23.5 percent of original size [2021-08-29 02:29:51,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39232 treesize of output 31236 [2021-08-29 02:29:52,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:29:52,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702055013] [2021-08-29 02:29:52,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:29:52,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040698259] [2021-08-29 02:29:52,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-29 02:29:52,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:29:52,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-29 02:29:52,398 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-29 02:29:52,398 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-08-29 02:29:52,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 02:29:52,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-29 02:29:52,620 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,SelfDestructingSolverStorable14 [2021-08-29 02:29:52,624 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 02:29:52,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:29:52 BoogieIcfgContainer [2021-08-29 02:29:52,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 02:29:52,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 02:29:52,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 02:29:52,635 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 02:29:52,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:27:56" (3/4) ... [2021-08-29 02:29:52,637 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 02:29:52,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 02:29:52,637 INFO L158 Benchmark]: Toolchain (without parser) took 116747.13ms. Allocated memory was 50.3MB in the beginning and 130.0MB in the end (delta: 79.7MB). Free memory was 27.4MB in the beginning and 95.6MB in the end (delta: -68.3MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-08-29 02:29:52,637 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 32.6MB in the beginning and 32.6MB in the end (delta: 39.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:29:52,638 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.29ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.2MB in the beginning and 43.9MB in the end (delta: -16.7MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2021-08-29 02:29:52,638 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.33ms. Allocated memory is still 60.8MB. Free memory was 43.7MB in the beginning and 42.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:29:52,638 INFO L158 Benchmark]: Boogie Preprocessor took 38.90ms. Allocated memory is still 60.8MB. Free memory was 42.0MB in the beginning and 40.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 02:29:52,638 INFO L158 Benchmark]: RCFGBuilder took 242.30ms. Allocated memory is still 60.8MB. Free memory was 40.7MB in the beginning and 31.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 02:29:52,640 INFO L158 Benchmark]: TraceAbstraction took 116196.77ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 30.9MB in the beginning and 96.7MB in the end (delta: -65.8MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. [2021-08-29 02:29:52,641 INFO L158 Benchmark]: Witness Printer took 2.51ms. Allocated memory is still 130.0MB. Free memory was 96.7MB in the beginning and 95.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 02:29:52,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 32.6MB in the beginning and 32.6MB in the end (delta: 39.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.29ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.2MB in the beginning and 43.9MB in the end (delta: -16.7MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.33ms. Allocated memory is still 60.8MB. Free memory was 43.7MB in the beginning and 42.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.90ms. Allocated memory is still 60.8MB. Free memory was 42.0MB in the beginning and 40.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 242.30ms. Allocated memory is still 60.8MB. Free memory was 40.7MB in the beginning and 31.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 116196.77ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 30.9MB in the beginning and 96.7MB in the end (delta: -65.8MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. * Witness Printer took 2.51ms. Allocated memory is still 130.0MB. Free memory was 96.7MB in the beginning and 95.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i 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 -> 967212eaab4ee70dc7d11c1f4edf607d989bdf53 [2021-08-29 02:29:54,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 02:29:54,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 02:29:54,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 02:29:54,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 02:29:54,740 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 02:29:54,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s12if.c [2021-08-29 02:29:54,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b186821a/41b71f15a6cc4a7086d44c14acc852fb/FLAGe879d9fd8 [2021-08-29 02:29:55,157 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 02:29:55,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s12if.c [2021-08-29 02:29:55,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b186821a/41b71f15a6cc4a7086d44c14acc852fb/FLAGe879d9fd8 [2021-08-29 02:29:55,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b186821a/41b71f15a6cc4a7086d44c14acc852fb [2021-08-29 02:29:55,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 02:29:55,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 02:29:55,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 02:29:55,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 02:29:55,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 02:29:55,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11aa9940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55, skipping insertion in model container [2021-08-29 02:29:55,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 02:29:55,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 02:29:55,283 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/array-fpi/s12if.c[588,601] [2021-08-29 02:29:55,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 02:29:55,311 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 02:29:55,321 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/array-fpi/s12if.c[588,601] [2021-08-29 02:29:55,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 02:29:55,355 INFO L208 MainTranslator]: Completed translation [2021-08-29 02:29:55,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55 WrapperNode [2021-08-29 02:29:55,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 02:29:55,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 02:29:55,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 02:29:55,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 02:29:55,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 02:29:55,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 02:29:55,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 02:29:55,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 02:29:55,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 02:29:55,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 02:29:55,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 02:29:55,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 02:29:55,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (1/1) ... [2021-08-29 02:29:55,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 02:29:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:29:55,454 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) [2021-08-29 02:29:55,479 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 [2021-08-29 02:29:55,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-29 02:29:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 02:29:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-29 02:29:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 02:29:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-29 02:29:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 02:29:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 02:29:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-29 02:29:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 02:29:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-29 02:29:55,690 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 02:29:55,691 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 02:29:55,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:29:55 BoogieIcfgContainer [2021-08-29 02:29:55,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 02:29:55,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 02:29:55,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 02:29:55,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 02:29:55,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:29:55" (1/3) ... [2021-08-29 02:29:55,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c75d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:29:55, skipping insertion in model container [2021-08-29 02:29:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:29:55" (2/3) ... [2021-08-29 02:29:55,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c75d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:29:55, skipping insertion in model container [2021-08-29 02:29:55,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:29:55" (3/3) ... [2021-08-29 02:29:55,697 INFO L111 eAbstractionObserver]: Analyzing ICFG s12if.c [2021-08-29 02:29:55,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 02:29:55,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 02:29:55,734 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 02:29:55,739 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 [2021-08-29 02:29:55,739 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 02:29:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 02:29:55,760 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:29:55,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:29:55,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:29:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:29:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-08-29 02:29:55,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:29:55,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229505522] [2021-08-29 02:29:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:29:55,777 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:29:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:29:55,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:29:55,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-29 02:29:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:29:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-29 02:29:55,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:29:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:29:55,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:29:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:29:55,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:29:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229505522] [2021-08-29 02:29:55,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229505522] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 02:29:55,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:29:55,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-29 02:29:55,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990143101] [2021-08-29 02:29:56,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 02:29:56,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:29:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 02:29:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 02:29:56,027 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:29:56,185 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-08-29 02:29:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 02:29:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 02:29:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:29:56,192 INFO L225 Difference]: With dead ends: 42 [2021-08-29 02:29:56,192 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 02:29:56,194 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.11ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 02:29:56,196 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.63ms IncrementalHoareTripleChecker+Time [2021-08-29 02:29:56,197 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 145.63ms Time] [2021-08-29 02:29:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 02:29:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 02:29:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-08-29 02:29:56,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-08-29 02:29:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:29:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-08-29 02:29:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-08-29 02:29:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 02:29:56,243 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:29:56,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:29:56,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-29 02:29:56,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:29:56,454 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:29:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:29:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-08-29 02:29:56,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:29:56,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757479308] [2021-08-29 02:29:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:29:56,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:29:56,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:29:56,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:29:56,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-29 02:29:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:29:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 02:29:56,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:29:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:29:56,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:29:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:29:56,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:29:56,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757479308] [2021-08-29 02:29:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757479308] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 02:29:56,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:29:56,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-29 02:29:56,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669557931] [2021-08-29 02:29:56,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 02:29:56,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:29:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 02:29:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-29 02:29:56,723 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:29:57,013 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-08-29 02:29:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 02:29:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 02:29:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:29:57,014 INFO L225 Difference]: With dead ends: 39 [2021-08-29 02:29:57,014 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 02:29:57,014 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 123.58ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:29:57,015 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.45ms IncrementalHoareTripleChecker+Time [2021-08-29 02:29:57,015 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 197.45ms Time] [2021-08-29 02:29:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 02:29:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-08-29 02:29:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-08-29 02:29:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-08-29 02:29:57,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-08-29 02:29:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:29:57,019 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-08-29 02:29:57,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:29:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-08-29 02:29:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:29:57,020 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:29:57,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:29:57,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-29 02:29:57,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:29:57,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:29:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:29:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-08-29 02:29:57,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:29:57,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963614271] [2021-08-29 02:29:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:29:57,230 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:29:57,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:29:57,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:29:57,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-29 02:29:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:29:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 02:29:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:29:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 12 treesize of output 10 [2021-08-29 02:29:57,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 02:29:57,404 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-29 02:29:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-08-29 02:29:57,465 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-29 02:29:57,466 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 1 case distinctions, treesize of input 36 treesize of output 38 [2021-08-29 02:29:57,759 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-29 02:29:57,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-08-29 02:29:58,019 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-08-29 02:29:58,020 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 88 treesize of output 53 [2021-08-29 02:29:58,202 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-29 02:29:58,203 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 102 treesize of output 68 [2021-08-29 02:29:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:29:58,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:30:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:30:02,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 02:30:02,095 INFO L354 Elim1Store]: treesize reduction 87, result has 26.3 percent of original size [2021-08-29 02:30:02,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 835 treesize of output 529 [2021-08-29 02:30:02,112 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 02:30:02,112 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 529 treesize of output 507 [2021-08-29 02:30:02,129 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-29 02:30:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 667 treesize of output 661 [2021-08-29 02:30:02,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 649 treesize of output 647 [2021-08-29 02:30:02,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 643 treesize of output 641 [2021-08-29 02:30:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:30:02,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:30:02,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963614271] [2021-08-29 02:30:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963614271] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:30:02,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:30:02,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-29 02:30:02,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281141486] [2021-08-29 02:30:02,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-29 02:30:02,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:30:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-29 02:30:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=448, Unknown=1, NotChecked=0, Total=552 [2021-08-29 02:30:02,447 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:05,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:30:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:30:07,137 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-08-29 02:30:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 02:30:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 02:30:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:30:07,139 INFO L225 Difference]: With dead ends: 63 [2021-08-29 02:30:07,139 INFO L226 Difference]: Without dead ends: 59 [2021-08-29 02:30:07,140 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 5220.62ms TimeCoverageRelationStatistics Valid=198, Invalid=857, Unknown=1, NotChecked=0, Total=1056 [2021-08-29 02:30:07,140 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3228.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.79ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 3436.07ms IncrementalHoareTripleChecker+Time [2021-08-29 02:30:07,141 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 512 Unknown, 0 Unchecked, 6.79ms Time], IncrementalHoareTripleChecker [53 Valid, 395 Invalid, 0 Unknown, 64 Unchecked, 3436.07ms Time] [2021-08-29 02:30:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-29 02:30:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2021-08-29 02:30:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-08-29 02:30:07,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2021-08-29 02:30:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:30:07,155 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-08-29 02:30:07,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-08-29 02:30:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:30:07,156 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:30:07,156 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:30:07,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-29 02:30:07,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:30:07,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:30:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:30:07,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-08-29 02:30:07,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:30:07,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651001902] [2021-08-29 02:30:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:30:07,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:30:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:30:07,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:30:07,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-29 02:30:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:30:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 02:30:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:30:07,467 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 11 treesize of output 7 [2021-08-29 02:30:07,518 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 25 treesize of output 13 [2021-08-29 02:30:07,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-08-29 02:30:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:30:07,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:30:07,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 14 treesize of output 12 [2021-08-29 02:30:07,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 22 treesize of output 20 [2021-08-29 02:30:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:30:07,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:30:07,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651001902] [2021-08-29 02:30:07,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651001902] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:30:07,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:30:07,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-29 02:30:07,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145490831] [2021-08-29 02:30:07,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 02:30:07,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:30:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 02:30:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:30:07,675 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:30:08,252 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-08-29 02:30:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 02:30:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 02:30:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:30:08,253 INFO L225 Difference]: With dead ends: 56 [2021-08-29 02:30:08,253 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 02:30:08,254 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 115.41ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-29 02:30:08,254 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 480.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 529.87ms IncrementalHoareTripleChecker+Time [2021-08-29 02:30:08,254 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 529.87ms Time] [2021-08-29 02:30:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 02:30:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-08-29 02:30:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 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) [2021-08-29 02:30:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-08-29 02:30:08,262 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 21 [2021-08-29 02:30:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:30:08,262 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-08-29 02:30:08,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-08-29 02:30:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:30:08,263 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:30:08,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:30:08,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-29 02:30:08,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:30:08,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:30:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:30:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1649883961, now seen corresponding path program 1 times [2021-08-29 02:30:08,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:30:08,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861164210] [2021-08-29 02:30:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:30:08,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:30:08,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:30:08,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:30:08,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-29 02:30:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:30:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 02:30:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:30:08,525 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 11 treesize of output 7 [2021-08-29 02:30:08,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-08-29 02:30:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:30:08,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:30:08,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 14 treesize of output 12 [2021-08-29 02:30:08,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 22 treesize of output 20 [2021-08-29 02:30:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:30:08,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:30:08,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861164210] [2021-08-29 02:30:08,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861164210] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:30:08,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:30:08,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-29 02:30:08,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828847315] [2021-08-29 02:30:08,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 02:30:08,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:30:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 02:30:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-29 02:30:08,669 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:30:09,133 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-08-29 02:30:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 02:30:09,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 02:30:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:30:09,134 INFO L225 Difference]: With dead ends: 57 [2021-08-29 02:30:09,134 INFO L226 Difference]: Without dead ends: 45 [2021-08-29 02:30:09,134 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.80ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-29 02:30:09,134 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 430.81ms IncrementalHoareTripleChecker+Time [2021-08-29 02:30:09,135 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 144 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 430.81ms Time] [2021-08-29 02:30:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-29 02:30:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-08-29 02:30:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-08-29 02:30:09,139 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 21 [2021-08-29 02:30:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:30:09,139 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-08-29 02:30:09,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-08-29 02:30:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 02:30:09,140 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:30:09,140 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:30:09,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-29 02:30:09,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:30:09,345 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:30:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:30:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-08-29 02:30:09,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:30:09,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089474505] [2021-08-29 02:30:09,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:30:09,346 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:30:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:30:09,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:30:09,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-29 02:30:09,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 02:30:09,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:30:09,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 02:30:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:30:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:30:09,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:30:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:30:09,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:30:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089474505] [2021-08-29 02:30:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089474505] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:30:09,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:30:09,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-29 02:30:09,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045658574] [2021-08-29 02:30:09,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-29 02:30:09,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:30:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-29 02:30:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-29 02:30:09,904 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:30:11,052 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-08-29 02:30:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-29 02:30:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 02:30:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:30:11,053 INFO L225 Difference]: With dead ends: 88 [2021-08-29 02:30:11,054 INFO L226 Difference]: Without dead ends: 73 [2021-08-29 02:30:11,054 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 530.13ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-08-29 02:30:11,056 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 255 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 749.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 839.39ms IncrementalHoareTripleChecker+Time [2021-08-29 02:30:11,056 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 0 Invalid, 475 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [104 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 839.39ms Time] [2021-08-29 02:30:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-29 02:30:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2021-08-29 02:30:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-08-29 02:30:11,062 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 23 [2021-08-29 02:30:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:30:11,063 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-08-29 02:30:11,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-08-29 02:30:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 02:30:11,064 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:30:11,064 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:30:11,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-08-29 02:30:11,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:30:11,269 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:30:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:30:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-08-29 02:30:11,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:30:11,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957285816] [2021-08-29 02:30:11,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 02:30:11,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:30:11,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:30:11,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:30:11,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-29 02:30:11,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-29 02:30:11,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:30:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 02:30:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:30:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:30:11,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:30:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:30:11,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:30:11,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957285816] [2021-08-29 02:30:11,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957285816] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:30:11,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:30:11,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-29 02:30:11,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232206669] [2021-08-29 02:30:11,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 02:30:11,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:30:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 02:30:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-29 02:30:11,659 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:30:12,212 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-08-29 02:30:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 02:30:12,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-08-29 02:30:12,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:30:12,212 INFO L225 Difference]: With dead ends: 89 [2021-08-29 02:30:12,213 INFO L226 Difference]: Without dead ends: 53 [2021-08-29 02:30:12,213 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 294.47ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-29 02:30:12,214 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.80ms IncrementalHoareTripleChecker+Time [2021-08-29 02:30:12,214 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 250 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [53 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 375.80ms Time] [2021-08-29 02:30:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-29 02:30:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-08-29 02:30:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 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) [2021-08-29 02:30:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-08-29 02:30:12,223 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2021-08-29 02:30:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:30:12,223 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-08-29 02:30:12,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:12,223 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-08-29 02:30:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 02:30:12,223 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:30:12,223 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:30:12,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-29 02:30:12,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:30:12,424 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:30:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:30:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-08-29 02:30:12,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:30:12,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800080840] [2021-08-29 02:30:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 02:30:12,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:30:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:30:12,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:30:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-29 02:30:12,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 02:30:12,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:30:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-29 02:30:12,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:30:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 02:30:12,571 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-29 02:30:12,571 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 1 case distinctions, treesize of input 20 treesize of output 21 [2021-08-29 02:30:12,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-08-29 02:30:12,622 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-29 02:30:12,622 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 1 case distinctions, treesize of input 36 treesize of output 38 [2021-08-29 02:30:12,791 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-29 02:30:12,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 53 [2021-08-29 02:30:13,190 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-08-29 02:30:13,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 58 [2021-08-29 02:30:13,509 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-08-29 02:30:13,509 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 3 case distinctions, treesize of input 58 treesize of output 51 [2021-08-29 02:30:14,079 INFO L354 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2021-08-29 02:30:14,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 75 [2021-08-29 02:30:14,360 INFO L354 Elim1Store]: treesize reduction 260, result has 10.3 percent of original size [2021-08-29 02:30:14,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 117 treesize of output 81 [2021-08-29 02:30:14,627 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-08-29 02:30:14,628 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 154 treesize of output 102 [2021-08-29 02:30:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:30:14,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:30:26,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:30:26,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 02:30:26,107 INFO L354 Elim1Store]: treesize reduction 624, result has 0.2 percent of original size [2021-08-29 02:30:26,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 378757018 treesize of output 1 [2021-08-29 02:30:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:30:26,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:30:26,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800080840] [2021-08-29 02:30:26,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800080840] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:30:26,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:30:26,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-08-29 02:30:26,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557377868] [2021-08-29 02:30:26,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-29 02:30:26,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:30:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-29 02:30:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-08-29 02:30:26,120 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:30:48,842 WARN L210 SmtUtils]: Spent 13.82s on a formula simplification. DAG size of input: 165 DAG size of output: 160 [2021-08-29 02:32:47,805 WARN L210 SmtUtils]: Spent 1.46m on a formula simplification. DAG size of input: 248 DAG size of output: 243 [2021-08-29 02:32:50,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:07,343 WARN L210 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2021-08-29 02:33:09,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:11,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:13,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:16,052 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:21,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:25,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:33:45,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:34:08,923 WARN L210 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 213 DAG size of output: 125 [2021-08-29 02:34:10,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:35:09,522 WARN L210 SmtUtils]: Spent 43.50s on a formula simplification. DAG size of input: 185 DAG size of output: 180 [2021-08-29 02:35:12,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:35:14,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:35:16,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:35:19,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:35:21,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:35:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:35:23,000 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-08-29 02:35:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-29 02:35:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-29 02:35:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:35:23,003 INFO L225 Difference]: With dead ends: 82 [2021-08-29 02:35:23,003 INFO L226 Difference]: Without dead ends: 64 [2021-08-29 02:35:23,005 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 265181.36ms TimeCoverageRelationStatistics Valid=672, Invalid=3485, Unknown=3, NotChecked=0, Total=4160 [2021-08-29 02:35:23,005 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 146 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42020.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.32ms SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 42988.95ms IncrementalHoareTripleChecker+Time [2021-08-29 02:35:23,005 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 769 Unknown, 0 Unchecked, 7.32ms Time], IncrementalHoareTripleChecker [146 Valid, 581 Invalid, 11 Unknown, 31 Unchecked, 42988.95ms Time] [2021-08-29 02:35:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-29 02:35:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-08-29 02:35:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:35:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-08-29 02:35:23,010 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 29 [2021-08-29 02:35:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:35:23,010 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-08-29 02:35:23,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:35:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-08-29 02:35:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 02:35:23,011 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:35:23,011 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:35:23,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-29 02:35:23,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:35:23,221 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:35:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:35:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-08-29 02:35:23,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:35:23,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781546660] [2021-08-29 02:35:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:35:23,222 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:35:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:35:23,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:35:23,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-29 02:35:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:35:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 02:35:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:35:23,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 9 [2021-08-29 02:35:23,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2021-08-29 02:35:23,468 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 31 treesize of output 15 [2021-08-29 02:35:23,630 INFO L354 Elim1Store]: treesize reduction 300, result has 10.2 percent of original size [2021-08-29 02:35:23,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 56 [2021-08-29 02:35:29,848 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-08-29 02:35:29,848 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 59 treesize of output 29 [2021-08-29 02:35:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:35:29,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:35:31,980 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (_ bv2 32) (let ((.cse3 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse2 (bvadd (_ bv4 32) |ULTIMATE.start_main_~#sum~0.offset|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse1 (bvadd (concat (select .cse0 .cse2) (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse3 c_ULTIMATE.start_main_~a~0.offset)))))) (store (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse1)) .cse2 ((_ extract 63 32) .cse1))))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) .cse3 c_ULTIMATE.start_main_~a~0.offset))))) is different from false [2021-08-29 02:35:45,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:35:45,222 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 7194 treesize of output 6416 [2021-08-29 02:35:45,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:35:45,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781546660] [2021-08-29 02:35:45,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-29 02:35:45,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [460199243] [2021-08-29 02:35:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:35:45,260 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-29 02:35:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-29 02:35:45,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-29 02:35:45,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-08-29 02:35:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:35:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-29 02:35:45,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:35:46,381 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 31 treesize of output 15 [2021-08-29 02:35:50,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:35:51,068 INFO L354 Elim1Store]: treesize reduction 286, result has 10.6 percent of original size [2021-08-29 02:35:51,069 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 10 case distinctions, treesize of input 91 treesize of output 61 [2021-08-29 02:35:55,883 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-08-29 02:35:55,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 34 [2021-08-29 02:35:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 02:35:55,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:36:01,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:36:01,068 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 7219 treesize of output 6437 [2021-08-29 02:36:01,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-29 02:36:01,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674123978] [2021-08-29 02:36:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:36:01,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:36:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:36:01,104 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) [2021-08-29 02:36:01,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 02:36:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:36:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 02:36:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:36:01,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 11 [2021-08-29 02:36:01,958 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 31 treesize of output 15 [2021-08-29 02:36:04,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:36:04,429 INFO L354 Elim1Store]: treesize reduction 286, result has 10.6 percent of original size [2021-08-29 02:36:04,429 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 10 case distinctions, treesize of input 78 treesize of output 56 [2021-08-29 02:36:15,108 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-08-29 02:36:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2021-08-29 02:36:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 02:36:15,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:36:15,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:36:15,331 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 7194 treesize of output 6416 [2021-08-29 02:36:15,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-29 02:36:15,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:36:15,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-29 02:36:15,371 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-29 02:36:15,371 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-08-29 02:36:15,374 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 02:36:15,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 02:36:15,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-08-29 02:36:15,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-08-29 02:36:15,989 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,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:36:15,993 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 02:36:16,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:36:16 BoogieIcfgContainer [2021-08-29 02:36:16,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 02:36:16,003 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 02:36:16,003 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 02:36:16,003 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 02:36:16,003 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:29:55" (3/4) ... [2021-08-29 02:36:16,005 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 02:36:16,005 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 02:36:16,005 INFO L158 Benchmark]: Toolchain (without parser) took 380827.54ms. Allocated memory was 54.5MB in the beginning and 83.9MB in the end (delta: 29.4MB). Free memory was 33.5MB in the beginning and 19.6MB in the end (delta: 13.9MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2021-08-29 02:36:16,006 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:36:16,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.55ms. Allocated memory was 54.5MB in the beginning and 69.2MB in the end (delta: 14.7MB). Free memory was 33.2MB in the beginning and 51.6MB in the end (delta: -18.4MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2021-08-29 02:36:16,006 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.18ms. Allocated memory is still 69.2MB. Free memory was 51.4MB in the beginning and 49.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:36:16,006 INFO L158 Benchmark]: Boogie Preprocessor took 44.54ms. Allocated memory is still 69.2MB. Free memory was 49.7MB in the beginning and 48.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 02:36:16,006 INFO L158 Benchmark]: RCFGBuilder took 266.52ms. Allocated memory is still 69.2MB. Free memory was 48.3MB in the beginning and 37.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 02:36:16,007 INFO L158 Benchmark]: TraceAbstraction took 380309.16ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 37.1MB in the beginning and 19.6MB in the end (delta: 17.5MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. [2021-08-29 02:36:16,007 INFO L158 Benchmark]: Witness Printer took 2.26ms. Allocated memory is still 83.9MB. Free memory is still 19.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:36:16,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.55ms. Allocated memory was 54.5MB in the beginning and 69.2MB in the end (delta: 14.7MB). Free memory was 33.2MB in the beginning and 51.6MB in the end (delta: -18.4MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.18ms. Allocated memory is still 69.2MB. Free memory was 51.4MB in the beginning and 49.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.54ms. Allocated memory is still 69.2MB. Free memory was 49.7MB in the beginning and 48.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 266.52ms. Allocated memory is still 69.2MB. Free memory was 48.3MB in the beginning and 37.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 380309.16ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 37.1MB in the beginning and 19.6MB in the end (delta: 17.5MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. * Witness Printer took 2.26ms. Allocated memory is still 83.9MB. Free memory is still 19.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i