./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/reducercommutativity/rangesum.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4dc91bf2fc8981aab63c1ee768384f1c8f580edfe4618d65089a78f799b6ddb8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:16:26,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:16:26,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:16:26,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:16:26,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:16:26,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:16:26,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:16:26,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:16:26,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:16:26,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:16:26,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:16:26,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:16:26,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:16:26,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:16:26,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:16:26,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:16:26,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:16:26,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:16:26,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:16:26,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:16:26,136 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:16:26,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:16:26,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:16:26,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:16:26,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:16:26,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:16:26,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:16:26,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:16:26,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:16:26,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:16:26,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:16:26,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:16:26,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:16:26,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:16:26,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:16:26,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:16:26,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:16:26,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:16:26,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:16:26,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:16:26,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:16:26,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:16:26,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:16:26,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:16:26,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:16:26,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:16:26,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:16:26,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:16:26,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:16:26,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:16:26,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:16:26,184 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:16:26,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:16:26,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:16:26,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:16:26,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:16:26,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:16:26,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:16:26,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:16:26,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:16:26,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:16:26,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:16:26,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:16:26,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:16:26,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:16:26,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:16:26,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:16:26,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:16:26,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:16:26,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:16:26,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:16:26,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:16:26,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:16:26,189 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:16:26,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:16:26,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:16:26,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4dc91bf2fc8981aab63c1ee768384f1c8f580edfe4618d65089a78f799b6ddb8 [2022-07-11 22:16:26,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:16:26,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:16:26,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:16:26,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:16:26,387 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:16:26,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2022-07-11 22:16:26,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a7dca88/e13f01ce9963414c86de7bf797b2fe85/FLAG43e405f06 [2022-07-11 22:16:26,794 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:16:26,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2022-07-11 22:16:26,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a7dca88/e13f01ce9963414c86de7bf797b2fe85/FLAG43e405f06 [2022-07-11 22:16:26,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a7dca88/e13f01ce9963414c86de7bf797b2fe85 [2022-07-11 22:16:26,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:16:26,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:16:26,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:16:26,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:16:26,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:16:26,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:26,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e405cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26, skipping insertion in model container [2022-07-11 22:16:26,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:26,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:16:26,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:16:26,951 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2022-07-11 22:16:26,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:16:26,958 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:16:26,971 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2022-07-11 22:16:26,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:16:26,981 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:16:26,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26 WrapperNode [2022-07-11 22:16:26,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:16:26,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:16:26,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:16:26,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:16:26,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:26,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,004 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2022-07-11 22:16:27,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:16:27,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:16:27,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:16:27,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:16:27,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:16:27,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:16:27,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:16:27,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:16:27,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (1/1) ... [2022-07-11 22:16:27,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:16:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:27,061 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) [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:16:27,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:16:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2022-07-11 22:16:27,086 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2022-07-11 22:16:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:16:27,099 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 [2022-07-11 22:16:27,135 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:16:27,136 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:16:27,278 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:16:27,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:16:27,287 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 22:16:27,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:16:27 BoogieIcfgContainer [2022-07-11 22:16:27,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:16:27,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:16:27,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:16:27,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:16:27,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:16:26" (1/3) ... [2022-07-11 22:16:27,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cedca1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:16:27, skipping insertion in model container [2022-07-11 22:16:27,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:16:26" (2/3) ... [2022-07-11 22:16:27,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cedca1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:16:27, skipping insertion in model container [2022-07-11 22:16:27,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:16:27" (3/3) ... [2022-07-11 22:16:27,310 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2022-07-11 22:16:27,320 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:16:27,321 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:16:27,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:16:27,407 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d6d6457, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@30e0dc1c [2022-07-11 22:16:27,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:16:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:16:27,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:27,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:27,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2094119026, now seen corresponding path program 1 times [2022-07-11 22:16:27,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:27,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258493883] [2022-07-11 22:16:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:27,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:27,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:16:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-11 22:16:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:27,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:16:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:16:27,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:27,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258493883] [2022-07-11 22:16:27,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258493883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:16:27,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:16:27,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:16:27,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894129408] [2022-07-11 22:16:27,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:16:27,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:16:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:16:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:16:27,654 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:16:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:27,672 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2022-07-11 22:16:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:16:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-07-11 22:16:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:27,681 INFO L225 Difference]: With dead ends: 55 [2022-07-11 22:16:27,681 INFO L226 Difference]: Without dead ends: 25 [2022-07-11 22:16:27,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:16:27,689 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:27,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-11 22:16:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-11 22:16:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-11 22:16:27,720 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2022-07-11 22:16:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:27,720 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-11 22:16:27,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:16:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-11 22:16:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:16:27,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:27,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:27,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:16:27,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2142996165, now seen corresponding path program 1 times [2022-07-11 22:16:27,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:27,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464551261] [2022-07-11 22:16:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:27,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:16:27,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464551261] [2022-07-11 22:16:27,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-11 22:16:27,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968911939] [2022-07-11 22:16:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:27,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:27,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:27,838 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) [2022-07-11 22:16:27,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:16:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:16:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:16:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:16:27,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:16:27,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968911939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:16:27,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:16:27,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:16:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320618779] [2022-07-11 22:16:27,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:16:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:16:27,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:16:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:16:27,939 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:16:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:27,950 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-07-11 22:16:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:16:27,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-11 22:16:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:27,952 INFO L225 Difference]: With dead ends: 49 [2022-07-11 22:16:27,952 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 22:16:27,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:16:27,954 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:27,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 22:16:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-11 22:16:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-11 22:16:27,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 30 [2022-07-11 22:16:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:27,963 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-11 22:16:27,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:16:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-11 22:16:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:16:27,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:27,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:27,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:16:28,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:28,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1650095802, now seen corresponding path program 1 times [2022-07-11 22:16:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:28,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157570790] [2022-07-11 22:16:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:16:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-11 22:16:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:16:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:16:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157570790] [2022-07-11 22:16:28,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157570790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:16:28,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:16:28,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:16:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115198333] [2022-07-11 22:16:28,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:16:28,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:16:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:16:28,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:16:28,213 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:16:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:28,229 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-07-11 22:16:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:16:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-07-11 22:16:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:28,230 INFO L225 Difference]: With dead ends: 55 [2022-07-11 22:16:28,230 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 22:16:28,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:16:28,231 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:28,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 22:16:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-11 22:16:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-11 22:16:28,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 30 [2022-07-11 22:16:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:28,236 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-11 22:16:28,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:16:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-11 22:16:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 22:16:28,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:28,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 22:16:28,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash 655585368, now seen corresponding path program 1 times [2022-07-11 22:16:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:28,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316742362] [2022-07-11 22:16:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:16:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 22:16:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 22:16:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 22:16:28,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316742362] [2022-07-11 22:16:28,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316742362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:16:28,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464238947] [2022-07-11 22:16:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:28,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:28,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:28,312 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) [2022-07-11 22:16:28,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:16:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:16:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:16:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:16:28,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:16:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:16:28,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464238947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:16:28,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:16:28,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-11 22:16:28,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024189791] [2022-07-11 22:16:28,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:16:28,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:16:28,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:16:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:16:28,455 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-11 22:16:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:28,523 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2022-07-11 22:16:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 22:16:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2022-07-11 22:16:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:28,526 INFO L225 Difference]: With dead ends: 60 [2022-07-11 22:16:28,526 INFO L226 Difference]: Without dead ends: 36 [2022-07-11 22:16:28,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-11 22:16:28,531 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:28,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-11 22:16:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-07-11 22:16:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-11 22:16:28,550 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 32 [2022-07-11 22:16:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:28,551 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-11 22:16:28,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-11 22:16:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-11 22:16:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 22:16:28,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:28,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:28,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:16:28,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 22:16:28,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -639666182, now seen corresponding path program 1 times [2022-07-11 22:16:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:28,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272850155] [2022-07-11 22:16:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 22:16:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:16:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:16:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-11 22:16:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:28,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272850155] [2022-07-11 22:16:28,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272850155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:16:28,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:16:28,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:16:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357760773] [2022-07-11 22:16:28,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:16:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:16:28,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:16:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:16:28,821 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:16:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:28,846 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-07-11 22:16:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:16:28,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-07-11 22:16:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:28,847 INFO L225 Difference]: With dead ends: 55 [2022-07-11 22:16:28,847 INFO L226 Difference]: Without dead ends: 36 [2022-07-11 22:16:28,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:16:28,848 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:28,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-11 22:16:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-07-11 22:16:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-07-11 22:16:28,852 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 43 [2022-07-11 22:16:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:28,853 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-07-11 22:16:28,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:16:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-07-11 22:16:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 22:16:28,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:28,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:28,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 22:16:28,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 121342172, now seen corresponding path program 1 times [2022-07-11 22:16:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:28,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621027564] [2022-07-11 22:16:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 22:16:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:16:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:16:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 22:16:29,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621027564] [2022-07-11 22:16:29,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621027564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:16:29,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:16:29,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 22:16:29,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261397741] [2022-07-11 22:16:29,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:16:29,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:16:29,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:29,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:16:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:16:29,005 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:29,054 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-07-11 22:16:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 22:16:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-11 22:16:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:29,055 INFO L225 Difference]: With dead ends: 63 [2022-07-11 22:16:29,055 INFO L226 Difference]: Without dead ends: 59 [2022-07-11 22:16:29,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-11 22:16:29,056 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:29,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 185 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-11 22:16:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-07-11 22:16:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:16:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-07-11 22:16:29,063 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 45 [2022-07-11 22:16:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:29,063 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-07-11 22:16:29,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:16:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-07-11 22:16:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 22:16:29,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:29,065 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:29,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 22:16:29,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1303372657, now seen corresponding path program 1 times [2022-07-11 22:16:29,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:29,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338661800] [2022-07-11 22:16:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:29,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:16:29,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013302609] [2022-07-11 22:16:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:29,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:29,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:29,088 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) [2022-07-11 22:16:29,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:16:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:16:29,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:16:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:16:29,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:16:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-11 22:16:29,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338661800] [2022-07-11 22:16:29,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:16:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013302609] [2022-07-11 22:16:29,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013302609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:16:29,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:16:29,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-07-11 22:16:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681712665] [2022-07-11 22:16:29,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:16:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 22:16:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 22:16:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:16:29,294 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:16:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:29,357 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2022-07-11 22:16:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:16:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-11 22:16:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:29,360 INFO L225 Difference]: With dead ends: 84 [2022-07-11 22:16:29,360 INFO L226 Difference]: Without dead ends: 49 [2022-07-11 22:16:29,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:16:29,364 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:29,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-11 22:16:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-11 22:16:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:16:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-07-11 22:16:29,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 48 [2022-07-11 22:16:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:29,373 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-07-11 22:16:29,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:16:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-07-11 22:16:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 22:16:29,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:29,375 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:29,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:16:29,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:29,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 729051389, now seen corresponding path program 2 times [2022-07-11 22:16:29,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007757296] [2022-07-11 22:16:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:29,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:29,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:16:29,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574970759] [2022-07-11 22:16:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:16:29,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:29,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:29,604 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) [2022-07-11 22:16:29,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:16:29,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:16:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:16:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:16:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:16:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-11 22:16:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:16:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-11 22:16:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:29,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007757296] [2022-07-11 22:16:29,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:16:29,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574970759] [2022-07-11 22:16:29,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574970759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:16:29,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:16:29,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-07-11 22:16:29,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648710527] [2022-07-11 22:16:29,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:16:29,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:16:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:16:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:16:29,814 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:16:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:29,927 INFO L93 Difference]: Finished difference Result 129 states and 169 transitions. [2022-07-11 22:16:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:16:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-07-11 22:16:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:29,931 INFO L225 Difference]: With dead ends: 129 [2022-07-11 22:16:29,931 INFO L226 Difference]: Without dead ends: 70 [2022-07-11 22:16:29,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:16:29,933 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:29,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 110 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:16:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-11 22:16:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-07-11 22:16:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-11 22:16:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-07-11 22:16:29,940 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 57 [2022-07-11 22:16:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:29,940 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-07-11 22:16:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:16:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-07-11 22:16:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 22:16:29,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:29,942 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:29,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:16:30,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:30,149 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash 619340959, now seen corresponding path program 3 times [2022-07-11 22:16:30,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522785769] [2022-07-11 22:16:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:30,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:16:30,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929315449] [2022-07-11 22:16:30,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:16:30,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:30,163 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) [2022-07-11 22:16:30,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:16:30,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 22:16:30,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:16:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:16:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:16:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 51 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-11 22:16:30,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:16:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 51 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-11 22:16:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522785769] [2022-07-11 22:16:30,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:16:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929315449] [2022-07-11 22:16:30,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929315449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:16:30,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:16:30,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-07-11 22:16:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697317713] [2022-07-11 22:16:30,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:16:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:16:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:16:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:16:30,400 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:16:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:30,529 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-07-11 22:16:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:16:30,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 59 [2022-07-11 22:16:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:30,530 INFO L225 Difference]: With dead ends: 121 [2022-07-11 22:16:30,530 INFO L226 Difference]: Without dead ends: 64 [2022-07-11 22:16:30,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-11 22:16:30,531 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:30,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 57 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:16:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-11 22:16:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-07-11 22:16:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:16:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-07-11 22:16:30,536 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 59 [2022-07-11 22:16:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:30,537 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-07-11 22:16:30,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:16:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-07-11 22:16:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 22:16:30,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:30,537 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:30,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 22:16:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:30,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 433918235, now seen corresponding path program 1 times [2022-07-11 22:16:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:30,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809156808] [2022-07-11 22:16:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:30,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:16:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203148460] [2022-07-11 22:16:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:30,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:30,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:30,765 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) [2022-07-11 22:16:30,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:16:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:16:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 22:16:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:16:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-11 22:16:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:16:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-11 22:16:30,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:16:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809156808] [2022-07-11 22:16:30,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:16:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203148460] [2022-07-11 22:16:30,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203148460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:16:30,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:16:30,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-11 22:16:30,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468697324] [2022-07-11 22:16:30,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:16:30,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 22:16:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:16:30,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 22:16:30,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-11 22:16:30,919 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:16:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:16:31,002 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-07-11 22:16:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 22:16:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-07-11 22:16:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:16:31,002 INFO L225 Difference]: With dead ends: 78 [2022-07-11 22:16:31,003 INFO L226 Difference]: Without dead ends: 54 [2022-07-11 22:16:31,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:16:31,003 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:16:31,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:16:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-11 22:16:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-07-11 22:16:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:16:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-07-11 22:16:31,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 65 [2022-07-11 22:16:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:16:31,008 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-07-11 22:16:31,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:16:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-07-11 22:16:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 22:16:31,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:16:31,009 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:31,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:16:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:31,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:16:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:16:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1262430211, now seen corresponding path program 2 times [2022-07-11 22:16:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:16:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821597330] [2022-07-11 22:16:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:16:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:16:31,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:16:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595414210] [2022-07-11 22:16:31,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:16:31,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:16:31,222 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) [2022-07-11 22:16:31,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:16:31,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:16:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-11 22:16:31,304 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-11 22:16:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-11 22:16:31,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-11 22:16:31,361 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-11 22:16:31,362 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 22:16:31,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:16:31,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:16:31,566 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-07-11 22:16:31,568 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-11 22:16:31,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.07 10:16:31 BoogieIcfgContainer [2022-07-11 22:16:31,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-11 22:16:31,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-11 22:16:31,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-11 22:16:31,605 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-11 22:16:31,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:16:27" (3/4) ... [2022-07-11 22:16:31,606 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-11 22:16:31,646 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-11 22:16:31,646 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-11 22:16:31,647 INFO L158 Benchmark]: Toolchain (without parser) took 4837.13ms. Allocated memory was 79.7MB in the beginning and 125.8MB in the end (delta: 46.1MB). Free memory was 44.4MB in the beginning and 46.2MB in the end (delta: -1.8MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. [2022-07-11 22:16:31,647 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory is still 61.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 22:16:31,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.79ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 44.2MB in the beginning and 80.5MB in the end (delta: -36.3MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2022-07-11 22:16:31,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.86ms. Allocated memory is still 104.9MB. Free memory was 80.5MB in the beginning and 78.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 22:16:31,648 INFO L158 Benchmark]: Boogie Preprocessor took 16.18ms. Allocated memory is still 104.9MB. Free memory was 78.8MB in the beginning and 77.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-11 22:16:31,648 INFO L158 Benchmark]: RCFGBuilder took 269.67ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 66.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-11 22:16:31,648 INFO L158 Benchmark]: TraceAbstraction took 4303.87ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 65.5MB in the beginning and 50.4MB in the end (delta: 15.1MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. [2022-07-11 22:16:31,648 INFO L158 Benchmark]: Witness Printer took 41.71ms. Allocated memory is still 125.8MB. Free memory was 50.4MB in the beginning and 46.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-11 22:16:31,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory is still 61.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.79ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 44.2MB in the beginning and 80.5MB in the end (delta: -36.3MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.86ms. Allocated memory is still 104.9MB. Free memory was 80.5MB in the beginning and 78.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.18ms. Allocated memory is still 104.9MB. Free memory was 78.8MB in the beginning and 77.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 269.67ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 66.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4303.87ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 65.5MB in the beginning and 50.4MB in the end (delta: 15.1MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. * Witness Printer took 41.71ms. Allocated memory is still 125.8MB. Free memory was 50.4MB in the beginning and 46.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; VAL [N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L46] CALL init_nondet(x) [L17] int i; [L18] i = 0 VAL [i=0, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=1, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=2, N=3, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [i=3, N=3, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [i=3, N=3, x={3:0}, x={3:0}] [L46] RET init_nondet(x) [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; VAL [N=3, x={3:0}] [L52] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [cnt=1, i=2, N=3, ret=-1, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\result=-1, cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L52] RET, EXPR rangesum(x) VAL [N=3, rangesum(x)=-1, x={3:0}] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp VAL [N=3, ret=-1, temp=-1, x={3:0}] [L55] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [cnt=1, i=2, N=3, ret=-1, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\result=-1, cnt=1, i=3, N=3, ret=-1, x={3:0}, x={3:0}] [L55] RET, EXPR rangesum(x) VAL [N=3, rangesum(x)=-1, ret=-1, temp=-1, x={3:0}] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [i=0, N=3, ret=-1, ret2=-1, temp=0, x={3:0}] [L57] COND TRUE i N/2) VAL [cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [cnt=1, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [cnt=1, i=3, N=3, ret=0, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [cnt=1, i=3, N=3, ret=0, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\result=0, cnt=1, i=3, N=3, ret=0, x={3:0}, x={3:0}] [L61] RET, EXPR rangesum(x) VAL [i=2, N=3, rangesum(x)=0, ret=-1, ret2=-1, temp=0, x={3:0}] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [i=2, N=3, ret=-1, ret2=-1, ret5=0, temp=0, x={3:0}] [L64] reach_error() VAL [i=2, N=3, ret=-1, ret2=-1, ret5=0, temp=0, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 243 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 237 mSDsluCounter, 708 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 449 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 621 IncrementalHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 259 mSDtfsCounter, 621 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 547 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=8, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 40 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 568 NumberOfCodeBlocks, 552 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 716 ConstructedInterpolants, 0 QuantifiedInterpolants, 1531 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1117 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 899/1014 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-11 22:16:31,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE