./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/nla-digbench-scaling/hard2_valuebound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:24:57,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:24:57,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:24:57,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:24:57,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:24:57,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:24:57,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:24:57,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:24:57,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:24:57,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:24:57,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:24:57,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:24:57,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:24:57,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:24:57,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:24:57,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:24:57,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:24:57,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:24:57,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:24:57,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:24:57,224 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:24:57,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:24:57,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:24:57,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:24:57,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:24:57,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:24:57,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:24:57,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:24:57,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:24:57,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:24:57,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:24:57,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:24:57,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:24:57,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:24:57,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:24:57,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:24:57,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:24:57,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:24:57,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:24:57,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:24:57,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:24:57,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:24:57,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:24:57,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:24:57,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:24:57,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:24:57,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:24:57,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:24:57,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:24:57,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:24:57,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:24:57,292 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:24:57,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:24:57,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:24:57,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:24:57,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:24:57,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:24:57,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:24:57,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:24:57,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:24:57,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:24:57,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:24:57,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:24:57,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:24:57,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:24:57,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:24:57,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:24:57,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:24:57,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:24:57,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:24:57,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:24:57,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:24:57,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:24:57,309 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:24:57,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:24:57,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:24:57,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 [2022-07-22 16:24:57,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:24:57,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:24:57,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:24:57,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:24:57,523 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:24:57,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2022-07-22 16:24:57,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5e58264/4c060f6a60fa4b1fa0dc57bd6b08519a/FLAG79d5685d0 [2022-07-22 16:24:57,935 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:24:57,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2022-07-22 16:24:57,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5e58264/4c060f6a60fa4b1fa0dc57bd6b08519a/FLAG79d5685d0 [2022-07-22 16:24:58,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5e58264/4c060f6a60fa4b1fa0dc57bd6b08519a [2022-07-22 16:24:58,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:24:58,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:24:58,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:24:58,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:24:58,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:24:58,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a68fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58, skipping insertion in model container [2022-07-22 16:24:58,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:24:58,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:24:58,478 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/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2022-07-22 16:24:58,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:24:58,498 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:24:58,508 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/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2022-07-22 16:24:58,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:24:58,525 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:24:58,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58 WrapperNode [2022-07-22 16:24:58,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:24:58,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:24:58,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:24:58,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:24:58,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,562 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-22 16:24:58,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:24:58,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:24:58,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:24:58,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:24:58,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:24:58,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:24:58,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:24:58,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:24:58,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (1/1) ... [2022-07-22 16:24:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:24:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:24:58,617 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) [2022-07-22 16:24:58,619 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 [2022-07-22 16:24:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:24:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:24:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:24:58,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:24:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:24:58,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:24:58,695 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:24:58,696 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:24:58,843 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:24:58,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:24:58,849 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 16:24:58,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:24:58 BoogieIcfgContainer [2022-07-22 16:24:58,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:24:58,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:24:58,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:24:58,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:24:58,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:24:58" (1/3) ... [2022-07-22 16:24:58,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff21706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:24:58, skipping insertion in model container [2022-07-22 16:24:58,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:24:58" (2/3) ... [2022-07-22 16:24:58,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff21706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:24:58, skipping insertion in model container [2022-07-22 16:24:58,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:24:58" (3/3) ... [2022-07-22 16:24:58,867 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2022-07-22 16:24:58,890 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:24:58,890 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:24:58,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:24:58,943 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@71cf1fb9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@48deb5d6 [2022-07-22 16:24:58,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:24:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:24:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:24:58,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:24:58,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:24:58,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:24:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:24:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2022-07-22 16:24:58,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:24:58,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073323901] [2022-07-22 16:24:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:24:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:24:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:24:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:24:59,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:24:59,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073323901] [2022-07-22 16:24:59,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073323901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:24:59,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:24:59,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:24:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356683588] [2022-07-22 16:24:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:24:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:24:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:24:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:24:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:24:59,144 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:24:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:24:59,166 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2022-07-22 16:24:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:24:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 16:24:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:24:59,177 INFO L225 Difference]: With dead ends: 49 [2022-07-22 16:24:59,177 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 16:24:59,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:24:59,185 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-22 16:24:59,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:24:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 16:24:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-22 16:24:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 16:24:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-07-22 16:24:59,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2022-07-22 16:24:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:24:59,231 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-07-22 16:24:59,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:24:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-07-22 16:24:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:24:59,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:24:59,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:24:59,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:24:59,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:24:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:24:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2022-07-22 16:24:59,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:24:59,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062884707] [2022-07-22 16:24:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:24:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:24:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:24:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:24:59,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:24:59,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062884707] [2022-07-22 16:24:59,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062884707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:24:59,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:24:59,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:24:59,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287554412] [2022-07-22 16:24:59,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:24:59,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:24:59,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:24:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:24:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:24:59,383 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:24:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:24:59,450 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-07-22 16:24:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:24:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 16:24:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:24:59,451 INFO L225 Difference]: With dead ends: 35 [2022-07-22 16:24:59,452 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 16:24:59,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:24:59,453 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:24:59,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:24:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 16:24:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-07-22 16:24:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 16:24:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-22 16:24:59,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2022-07-22 16:24:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:24:59,465 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-22 16:24:59,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:24:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-22 16:24:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 16:24:59,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:24:59,466 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:24:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:24:59,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:24:59,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:24:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2022-07-22 16:24:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:24:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438023385] [2022-07-22 16:24:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:24:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:24:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:24:59,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 16:24:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:24:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:24:59,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:24:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438023385] [2022-07-22 16:24:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438023385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:24:59,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:24:59,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:24:59,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190594700] [2022-07-22 16:24:59,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:24:59,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:24:59,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:24:59,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:24:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:24:59,567 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:24:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:24:59,616 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-07-22 16:24:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:24:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-22 16:24:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:24:59,618 INFO L225 Difference]: With dead ends: 39 [2022-07-22 16:24:59,618 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 16:24:59,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:24:59,620 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:24:59,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:24:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 16:24:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-22 16:24:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 16:24:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-07-22 16:24:59,628 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-07-22 16:24:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:24:59,628 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-07-22 16:24:59,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:24:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-07-22 16:24:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 16:24:59,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:24:59,630 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:24:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 16:24:59,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:24:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:24:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2022-07-22 16:24:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:24:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779423835] [2022-07-22 16:24:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:24:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:24:59,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:24:59,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720987059] [2022-07-22 16:24:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:24:59,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:24:59,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:24:59,650 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) [2022-07-22 16:24:59,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:24:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:24:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 16:24:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:24:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:24:59,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:24:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:24:59,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779423835] [2022-07-22 16:24:59,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:24:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720987059] [2022-07-22 16:24:59,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720987059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:24:59,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:24:59,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:24:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813780630] [2022-07-22 16:24:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:24:59,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:24:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:24:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:24:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:24:59,811 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 16:24:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:24:59,863 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-22 16:24:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:24:59,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-22 16:24:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:24:59,865 INFO L225 Difference]: With dead ends: 58 [2022-07-22 16:24:59,865 INFO L226 Difference]: Without dead ends: 44 [2022-07-22 16:24:59,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:24:59,867 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:24:59,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:24:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-22 16:24:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-22 16:24:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:24:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-07-22 16:24:59,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2022-07-22 16:24:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:24:59,876 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-07-22 16:24:59,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 16:24:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-07-22 16:24:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 16:24:59,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:24:59,877 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:24:59,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:00,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2022-07-22 16:25:00,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:00,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523993764] [2022-07-22 16:25:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:00,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:00,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972889954] [2022-07-22 16:25:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:00,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:00,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:00,104 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) [2022-07-22 16:25:00,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:25:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:25:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 16:25:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:25:00,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:25:00,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523993764] [2022-07-22 16:25:00,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972889954] [2022-07-22 16:25:00,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972889954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:25:00,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:25:00,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:25:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531433630] [2022-07-22 16:25:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:25:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:25:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:25:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:25:00,259 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:25:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:00,342 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-22 16:25:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:25:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-22 16:25:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:00,347 INFO L225 Difference]: With dead ends: 57 [2022-07-22 16:25:00,350 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 16:25:00,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:25:00,352 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:00,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:25:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 16:25:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-22 16:25:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 16:25:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-22 16:25:00,372 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2022-07-22 16:25:00,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:00,372 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-22 16:25:00,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:25:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-22 16:25:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 16:25:00,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:00,377 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:00,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:00,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:00,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:00,601 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2022-07-22 16:25:00,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:00,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058286688] [2022-07-22 16:25:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:00,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:00,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476931095] [2022-07-22 16:25:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:00,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:00,625 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) [2022-07-22 16:25:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:25:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:25:00,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 16:25:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 16:25:00,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:25:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 16:25:00,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:00,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058286688] [2022-07-22 16:25:00,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:00,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476931095] [2022-07-22 16:25:00,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476931095] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:25:00,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:25:00,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-22 16:25:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028287875] [2022-07-22 16:25:00,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:25:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:25:00,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:25:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:25:00,878 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:25:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:01,106 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-22 16:25:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:25:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-22 16:25:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:01,109 INFO L225 Difference]: With dead ends: 61 [2022-07-22 16:25:01,109 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 16:25:01,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:25:01,110 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 80 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:25:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 16:25:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-22 16:25:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 16:25:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-22 16:25:01,119 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2022-07-22 16:25:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:01,120 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-22 16:25:01,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:25:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-22 16:25:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 16:25:01,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:01,121 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:01,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:01,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:01,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2022-07-22 16:25:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:01,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963611911] [2022-07-22 16:25:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:01,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:01,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110219024] [2022-07-22 16:25:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:01,344 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) [2022-07-22 16:25:01,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:25:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:25:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 16:25:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 16:25:01,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:25:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 16:25:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963611911] [2022-07-22 16:25:02,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110219024] [2022-07-22 16:25:02,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110219024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:25:02,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:25:02,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-22 16:25:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297752171] [2022-07-22 16:25:02,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:25:02,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:25:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:25:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:25:02,562 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 16:25:07,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:25:11,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:25:13,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:25:15,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:25:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:15,999 INFO L93 Difference]: Finished difference Result 171 states and 240 transitions. [2022-07-22 16:25:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:25:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-07-22 16:25:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:16,003 INFO L225 Difference]: With dead ends: 171 [2022-07-22 16:25:16,003 INFO L226 Difference]: Without dead ends: 142 [2022-07-22 16:25:16,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:25:16,004 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 28 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 67 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:16,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 205 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 408 Invalid, 4 Unknown, 0 Unchecked, 9.5s Time] [2022-07-22 16:25:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-22 16:25:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2022-07-22 16:25:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 16:25:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2022-07-22 16:25:16,026 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 56 [2022-07-22 16:25:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:16,027 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2022-07-22 16:25:16,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 16:25:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2022-07-22 16:25:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 16:25:16,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:16,029 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:16,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:16,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:16,252 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2022-07-22 16:25:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:16,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518310238] [2022-07-22 16:25:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:16,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:16,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506973253] [2022-07-22 16:25:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:16,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:16,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:16,264 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) [2022-07-22 16:25:16,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:25:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:25:16,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 16:25:16,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 16:25:16,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:25:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 16:25:16,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518310238] [2022-07-22 16:25:16,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506973253] [2022-07-22 16:25:16,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506973253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:25:16,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:25:16,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-22 16:25:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901922024] [2022-07-22 16:25:16,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:25:16,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 16:25:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 16:25:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-22 16:25:16,774 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-22 16:25:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:17,310 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2022-07-22 16:25:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:25:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 67 [2022-07-22 16:25:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:17,312 INFO L225 Difference]: With dead ends: 167 [2022-07-22 16:25:17,312 INFO L226 Difference]: Without dead ends: 113 [2022-07-22 16:25:17,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:25:17,314 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:17,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 97 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 16:25:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-22 16:25:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2022-07-22 16:25:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 64 states have (on average 1.1875) internal successors, (76), 66 states have internal predecessors, (76), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 16:25:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2022-07-22 16:25:17,330 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 67 [2022-07-22 16:25:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:17,330 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2022-07-22 16:25:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-22 16:25:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2022-07-22 16:25:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 16:25:17,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:17,332 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:17,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:17,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:17,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1842513023, now seen corresponding path program 1 times [2022-07-22 16:25:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:17,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457943755] [2022-07-22 16:25:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:17,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:17,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251116375] [2022-07-22 16:25:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:17,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:17,558 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) [2022-07-22 16:25:17,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:25:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:25:17,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:25:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-22 16:25:17,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:25:17,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:17,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457943755] [2022-07-22 16:25:17,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:17,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251116375] [2022-07-22 16:25:17,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251116375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:25:17,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:25:17,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:25:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641971351] [2022-07-22 16:25:17,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:25:17,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:25:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:25:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:25:17,701 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 16:25:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:17,751 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2022-07-22 16:25:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:25:17,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2022-07-22 16:25:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:17,753 INFO L225 Difference]: With dead ends: 130 [2022-07-22 16:25:17,753 INFO L226 Difference]: Without dead ends: 118 [2022-07-22 16:25:17,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:25:17,754 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:17,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:25:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-22 16:25:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-07-22 16:25:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 16:25:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2022-07-22 16:25:17,777 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 76 [2022-07-22 16:25:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:17,778 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2022-07-22 16:25:17,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 16:25:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2022-07-22 16:25:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 16:25:17,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:17,779 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:17,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 16:25:17,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:17,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash -246287259, now seen corresponding path program 1 times [2022-07-22 16:25:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:17,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477871267] [2022-07-22 16:25:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:18,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083805033] [2022-07-22 16:25:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:18,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:18,002 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) [2022-07-22 16:25:18,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:25:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:25:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 16:25:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-22 16:25:18,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:25:18,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477871267] [2022-07-22 16:25:18,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083805033] [2022-07-22 16:25:18,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083805033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:25:18,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:25:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 16:25:18,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416990512] [2022-07-22 16:25:18,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:25:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:25:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:25:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:25:18,209 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 16:25:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:18,308 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2022-07-22 16:25:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:25:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-07-22 16:25:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:18,310 INFO L225 Difference]: With dead ends: 151 [2022-07-22 16:25:18,310 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 16:25:18,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:25:18,311 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:18,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:25:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 16:25:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2022-07-22 16:25:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 29 states have call successors, (29), 12 states have call predecessors, (29), 12 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:25:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-07-22 16:25:18,327 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 78 [2022-07-22 16:25:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:18,328 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-07-22 16:25:18,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 16:25:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-07-22 16:25:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 16:25:18,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:18,329 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:18,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:18,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -947351837, now seen corresponding path program 2 times [2022-07-22 16:25:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339992847] [2022-07-22 16:25:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:18,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:18,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027619060] [2022-07-22 16:25:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:25:18,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:18,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:25:18,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:25:18,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:25:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:25:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 16:25:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-22 16:25:18,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:25:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-22 16:25:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339992847] [2022-07-22 16:25:19,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:19,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027619060] [2022-07-22 16:25:19,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027619060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:25:19,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:25:19,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-22 16:25:19,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550110037] [2022-07-22 16:25:19,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:25:19,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 16:25:19,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:19,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 16:25:19,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 16:25:19,867 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-07-22 16:25:29,006 WARN L233 SmtUtils]: Spent 9.01s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:25:31,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:25:33,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:25:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:33,258 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2022-07-22 16:25:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:25:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 78 [2022-07-22 16:25:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:33,259 INFO L225 Difference]: With dead ends: 159 [2022-07-22 16:25:33,259 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 16:25:33,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:25:33,260 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:33,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 215 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 16:25:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 16:25:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-22 16:25:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.103896103896104) internal successors, (85), 79 states have internal predecessors, (85), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 16:25:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2022-07-22 16:25:33,279 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 78 [2022-07-22 16:25:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:33,279 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2022-07-22 16:25:33,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-07-22 16:25:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2022-07-22 16:25:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 16:25:33,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:25:33,281 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:33,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:33,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 16:25:33,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:25:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:25:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 3 times [2022-07-22 16:25:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:25:33,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151065010] [2022-07-22 16:25:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:25:33,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:25:33,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:25:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446982789] [2022-07-22 16:25:33,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:25:33,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:33,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:25:33,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:25:33,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:25:33,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:25:33,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:25:33,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 16:25:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:25:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-22 16:25:33,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:25:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-22 16:25:34,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:25:34,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151065010] [2022-07-22 16:25:34,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:25:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446982789] [2022-07-22 16:25:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446982789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:25:34,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:25:34,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-22 16:25:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102737322] [2022-07-22 16:25:34,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:25:34,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 16:25:34,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:25:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 16:25:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-22 16:25:34,312 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-22 16:25:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:25:34,777 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2022-07-22 16:25:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:25:34,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2022-07-22 16:25:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:25:34,778 INFO L225 Difference]: With dead ends: 149 [2022-07-22 16:25:34,778 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 16:25:34,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:25:34,779 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:25:34,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 143 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 16:25:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 16:25:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 16:25:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:25:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 16:25:34,780 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-07-22 16:25:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:25:34,780 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 16:25:34,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-22 16:25:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 16:25:34,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 16:25:34,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 16:25:34,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:25:34,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:25:34,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 16:25:36,396 INFO L902 garLoopResultBuilder]: At program point L60(lines 22 61) the Hoare annotation is: true [2022-07-22 16:25:36,396 INFO L899 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2022-07-22 16:25:36,397 INFO L899 garLoopResultBuilder]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2022-07-22 16:25:36,397 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2022-07-22 16:25:36,397 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-07-22 16:25:36,397 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~A~0#1| 2)) (.cse2 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse6 (<= 0 |ULTIMATE.start_main_~A~0#1|))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 (div (div |ULTIMATE.start_main_~p~0#1| 2) 2)) .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~r~0#1|)) (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-07-22 16:25:36,397 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-22 16:25:36,397 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-22 16:25:36,398 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-22 16:25:36,398 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (= 2 |ULTIMATE.start_main_~p~0#1|)) (.cse5 (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|))) (.cse4 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse6 (<= |ULTIMATE.start_main_~A~0#1| 2)) (.cse1 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse3) (and .cse4 .cse5 (<= (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|) 2) .cse0 .cse6 .cse3 (<= 0 |ULTIMATE.start_main_~A~0#1|) (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse5 (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse3) (and .cse4 (= |ULTIMATE.start_main_~q~0#1| 0) .cse6 .cse1 .cse2 (<= 1 (div (div |ULTIMATE.start_main_~p~0#1| 2) 2)) .cse3 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~r~0#1|)))) [2022-07-22 16:25:36,398 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-07-22 16:25:36,398 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse2 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse8 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse5 (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse9 (= 2 |ULTIMATE.start_main_~p~0#1|)) (.cse1 (<= |ULTIMATE.start_main_~A~0#1| 2)) (.cse7 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse4 (div |ULTIMATE.start_main_~p~0#1| 2)) (.cse6 (div |ULTIMATE.start_main_~d~0#1| 2))) (and .cse0 .cse1 .cse2 .cse3 (<= 1 (div .cse4 2)) (= (+ (* |ULTIMATE.start_main_~B~0#1| .cse4) .cse5 |ULTIMATE.start_main_~r~0#1|) (+ .cse6 |ULTIMATE.start_main_~A~0#1|)) .cse7 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse6 |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse8 .cse7) (and .cse9 .cse2 .cse3 .cse8 .cse7) (and .cse0 (= |ULTIMATE.start_main_~A~0#1| (+ .cse5 |ULTIMATE.start_main_~r~0#1|)) (<= (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|) 2) .cse9 .cse1 .cse7 (<= 0 |ULTIMATE.start_main_~A~0#1|) (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-07-22 16:25:36,398 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-07-22 16:25:36,398 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-22 16:25:36,399 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-07-22 16:25:36,399 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-07-22 16:25:36,399 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~A~0#1| 2)) (.cse2 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse6 (<= 0 |ULTIMATE.start_main_~A~0#1|))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 (div (div |ULTIMATE.start_main_~p~0#1| 2) 2)) .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~r~0#1|)) (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-07-22 16:25:36,399 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2022-07-22 16:25:36,399 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~A~0#1| 2)) (.cse2 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse6 (<= 0 |ULTIMATE.start_main_~A~0#1|))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 (div (div |ULTIMATE.start_main_~p~0#1| 2) 2)) .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~r~0#1|)) (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-07-22 16:25:36,399 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~A~0#1| 2)) (.cse2 (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse6 (<= 0 |ULTIMATE.start_main_~A~0#1|))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 (div (div |ULTIMATE.start_main_~p~0#1| 2) 2)) .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~r~0#1|)) (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-07-22 16:25:36,399 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-07-22 16:25:36,400 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-07-22 16:25:36,400 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-07-22 16:25:36,400 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-07-22 16:25:36,400 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-07-22 16:25:36,400 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-07-22 16:25:36,403 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:25:36,405 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 16:25:36,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 04:25:36 BoogieIcfgContainer [2022-07-22 16:25:36,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 16:25:36,424 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 16:25:36,424 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 16:25:36,424 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 16:25:36,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:24:58" (3/4) ... [2022-07-22 16:25:36,427 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 16:25:36,431 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-22 16:25:36,434 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-07-22 16:25:36,434 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-22 16:25:36,434 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-22 16:25:36,435 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 16:25:36,464 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 16:25:36,464 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 16:25:36,464 INFO L158 Benchmark]: Toolchain (without parser) took 38119.18ms. Allocated memory was 96.5MB in the beginning and 161.5MB in the end (delta: 65.0MB). Free memory was 70.8MB in the beginning and 117.2MB in the end (delta: -46.3MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2022-07-22 16:25:36,465 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 16:25:36,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.33ms. Allocated memory is still 96.5MB. Free memory was 70.6MB in the beginning and 60.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 16:25:36,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.25ms. Allocated memory is still 96.5MB. Free memory was 60.6MB in the beginning and 59.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 16:25:36,466 INFO L158 Benchmark]: Boogie Preprocessor took 22.46ms. Allocated memory is still 96.5MB. Free memory was 59.0MB in the beginning and 58.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 16:25:36,466 INFO L158 Benchmark]: RCFGBuilder took 270.14ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 58.0MB in the beginning and 111.6MB in the end (delta: -53.6MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2022-07-22 16:25:36,466 INFO L158 Benchmark]: TraceAbstraction took 37562.24ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 111.0MB in the beginning and 120.3MB in the end (delta: -9.3MB). Peak memory consumption was 96.2MB. Max. memory is 16.1GB. [2022-07-22 16:25:36,466 INFO L158 Benchmark]: Witness Printer took 40.11ms. Allocated memory is still 161.5MB. Free memory was 120.3MB in the beginning and 117.2MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 16:25:36,468 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.33ms. Allocated memory is still 96.5MB. Free memory was 70.6MB in the beginning and 60.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.25ms. Allocated memory is still 96.5MB. Free memory was 60.6MB in the beginning and 59.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.46ms. Allocated memory is still 96.5MB. Free memory was 59.0MB in the beginning and 58.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 270.14ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 58.0MB in the beginning and 111.6MB in the end (delta: -53.6MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 37562.24ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 111.0MB in the beginning and 120.3MB in the end (delta: -9.3MB). Peak memory consumption was 96.2MB. Max. memory is 16.1GB. * Witness Printer took 40.11ms. Allocated memory is still 161.5MB. Free memory was 120.3MB in the beginning and 117.2MB in the end (delta: 3.2MB). 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 37.5s, OverallIterations: 12, TraceHistogramMax: 14, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 28.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 236 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 177 mSDsluCounter, 1286 SdHoareTripleChecker+Invalid, 14.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 853 mSDsCounter, 246 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1625 IncrementalHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 246 mSolverCounterUnsat, 433 mSDtfsCounter, 1625 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 868 GetRequests, 766 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=11, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 62 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 108 PreInvPairs, 142 NumberOfFragments, 680 HoareAnnotationTreeSize, 108 FomulaSimplifications, 1260 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 2198 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 554 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 860 ConstructedInterpolants, 0 QuantifiedInterpolants, 5921 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1260 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 2667/2769 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((cond == 1 && A <= 2) && B * p == d) && A == r) && 1 <= p / 2 / 2) && d * q + r == A) && B == 1) && d % 2 == 0) && d / 2 <= r) || (((((((cond == 1 && B == d) && A <= 2) && B * p == d) && A == r) && d * q + r == A) && B == 1) && 0 <= A)) || (((((((cond == 1 && A <= 2) && B * p == d) && A == r) && d * q + r == A) && B == 1) && 0 <= A) && 2 == d) RESULT: Ultimate proved your program to be correct! [2022-07-22 16:25:36,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE