./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.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/prodbin-ll_valuebound10.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 ca6b6f09277139d829682a6458fdcdacf72411331aa404fd46248e3dcb9a9e7f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:41:34,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:41:34,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:41:34,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:41:34,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:41:34,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:41:34,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:41:34,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:41:34,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:41:34,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:41:34,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:41:34,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:41:34,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:41:34,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:41:34,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:41:34,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:41:34,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:41:34,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:41:34,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:41:34,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:41:34,126 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:41:34,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:41:34,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:41:34,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:41:34,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:41:34,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:41:34,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:41:34,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:41:34,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:41:34,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:41:34,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:41:34,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:41:34,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:41:34,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:41:34,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:41:34,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:41:34,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:41:34,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:41:34,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:41:34,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:41:34,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:41:34,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:41:34,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:41:34,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:41:34,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:41:34,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:41:34,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:41:34,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:41:34,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:41:34,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:41:34,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:41:34,164 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:41:34,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:41:34,165 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:41:34,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:41:34,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:41:34,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:41:34,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:41:34,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:41:34,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:41:34,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:41:34,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:41:34,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:41:34,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:41:34,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:41:34,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:41:34,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:41:34,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:41:34,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:41:34,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:41:34,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:41:34,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:41:34,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:41:34,168 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:41:34,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:41:34,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:41:34,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca6b6f09277139d829682a6458fdcdacf72411331aa404fd46248e3dcb9a9e7f [2022-07-22 16:41:34,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:41:34,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:41:34,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:41:34,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:41:34,379 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:41:34,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-07-22 16:41:34,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c554dbd/fcbd026f89a04c63a5fc8883846c81bd/FLAG441b55488 [2022-07-22 16:41:34,765 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:41:34,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-07-22 16:41:34,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c554dbd/fcbd026f89a04c63a5fc8883846c81bd/FLAG441b55488 [2022-07-22 16:41:35,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c554dbd/fcbd026f89a04c63a5fc8883846c81bd [2022-07-22 16:41:35,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:41:35,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:41:35,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:41:35,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:41:35,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:41:35,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b53f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35, skipping insertion in model container [2022-07-22 16:41:35,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:41:35,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:41:35,347 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/prodbin-ll_valuebound10.c[537,550] [2022-07-22 16:41:35,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:41:35,366 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:41:35,376 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/prodbin-ll_valuebound10.c[537,550] [2022-07-22 16:41:35,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:41:35,396 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:41:35,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35 WrapperNode [2022-07-22 16:41:35,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:41:35,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:41:35,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:41:35,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:41:35,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,419 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-07-22 16:41:35,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:41:35,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:41:35,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:41:35,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:41:35,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:41:35,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:41:35,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:41:35,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:41:35,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (1/1) ... [2022-07-22 16:41:35,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:41:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:35,480 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 16:41:35,512 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 16:41:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:41:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 16:41:35,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 16:41:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:41:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:41:35,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:41:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:41:35,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:41:35,562 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:41:35,563 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:41:35,681 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:41:35,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:41:35,692 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 16:41:35,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:41:35 BoogieIcfgContainer [2022-07-22 16:41:35,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:41:35,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:41:35,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:41:35,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:41:35,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:41:35" (1/3) ... [2022-07-22 16:41:35,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b342bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:41:35, skipping insertion in model container [2022-07-22 16:41:35,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:35" (2/3) ... [2022-07-22 16:41:35,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b342bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:41:35, skipping insertion in model container [2022-07-22 16:41:35,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:41:35" (3/3) ... [2022-07-22 16:41:35,706 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.c [2022-07-22 16:41:35,716 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:41:35,731 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:41:35,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:41:35,790 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@459c8091, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@508b1eaa [2022-07-22 16:41:35,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:41:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:41:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 16:41:35,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:35,819 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:35,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2022-07-22 16:41:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:35,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523994096] [2022-07-22 16:41:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:41:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:41:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:35,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:41:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:41:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:35,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523994096] [2022-07-22 16:41:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523994096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:35,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:35,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:41:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228633379] [2022-07-22 16:41:35,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:35,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:41:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:41:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:41:35,984 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 16:41:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:35,999 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-07-22 16:41:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:41:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-07-22 16:41:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:36,009 INFO L225 Difference]: With dead ends: 51 [2022-07-22 16:41:36,009 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 16:41:36,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:41:36,016 INFO L413 NwaCegarLoop]: 31 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, 31 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 16:41:36,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 16:41:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-22 16:41:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:41:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-22 16:41:36,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2022-07-22 16:41:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:36,047 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-22 16:41:36,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 16:41:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-22 16:41:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 16:41:36,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:36,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:41:36,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2022-07-22 16:41:36,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:36,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496935358] [2022-07-22 16:41:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:36,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617464105] [2022-07-22 16:41:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:36,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:36,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:36,092 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 16:41:36,144 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 16:41:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:41:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:41:36,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:41:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496935358] [2022-07-22 16:41:36,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617464105] [2022-07-22 16:41:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617464105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:36,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:36,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:41:36,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202304135] [2022-07-22 16:41:36,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:36,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:41:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:36,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:41:36,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:41:36,277 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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 16:41:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:36,321 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-22 16:41:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:41:36,322 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), 2 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 24 [2022-07-22 16:41:36,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:36,323 INFO L225 Difference]: With dead ends: 35 [2022-07-22 16:41:36,323 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 16:41:36,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 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 16:41:36,324 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:36,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 16:41:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-07-22 16:41:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:41:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-22 16:41:36,330 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2022-07-22 16:41:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:36,331 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-22 16:41:36,332 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), 2 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 16:41:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-22 16:41:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 16:41:36,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:36,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:36,349 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 16:41:36,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:36,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2022-07-22 16:41:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730616038] [2022-07-22 16:41:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:36,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:36,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207494693] [2022-07-22 16:41:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:36,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:36,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:36,561 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 16:41:36,562 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 16:41:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:41:36,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 16:41:36,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:41:36,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730616038] [2022-07-22 16:41:36,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207494693] [2022-07-22 16:41:36,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207494693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:36,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:36,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 16:41:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491776024] [2022-07-22 16:41:36,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:36,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:41:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:41:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:41:36,623 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 16:41:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:36,670 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-22 16:41:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:41:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-22 16:41:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:36,671 INFO L225 Difference]: With dead ends: 39 [2022-07-22 16:41:36,671 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 16:41:36,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:41:36,672 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:36,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 69 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 16:41:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-22 16:41:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:41:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-22 16:41:36,676 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2022-07-22 16:41:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:36,677 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-22 16:41:36,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 16:41:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-22 16:41:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 16:41:36,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:36,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:36,694 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 16:41:36,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 16:41:36,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2022-07-22 16:41:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:36,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407496512] [2022-07-22 16:41:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:36,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:36,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:36,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14217599] [2022-07-22 16:41:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:36,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:36,908 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 16:41:36,910 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 16:41:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 16:41:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:41:41,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:41:45,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:45,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407496512] [2022-07-22 16:41:45,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:45,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14217599] [2022-07-22 16:41:45,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14217599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:45,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:45,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-07-22 16:41:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021651907] [2022-07-22 16:41:45,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:41:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:41:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2022-07-22 16:41:45,870 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 16:41:48,003 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 16:41:49,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:52,636 WARN L534 Checker$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 16:42:00,974 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 16:42:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:02,063 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-07-22 16:42:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 16:42:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-07-22 16:42:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:02,065 INFO L225 Difference]: With dead ends: 48 [2022-07-22 16:42:02,065 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 16:42:02,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=75, Invalid=266, Unknown=1, NotChecked=0, Total=342 [2022-07-22 16:42:02,066 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 130 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 3 Unknown, 0 Unchecked, 10.4s Time] [2022-07-22 16:42:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 16:42:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-07-22 16:42:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:42:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-22 16:42:02,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 33 [2022-07-22 16:42:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:02,071 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-22 16:42:02,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 16:42:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-22 16:42:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 16:42:02,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:02,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:02,094 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 16:42:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:02,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash 403305007, now seen corresponding path program 1 times [2022-07-22 16:42:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:02,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907425489] [2022-07-22 16:42:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:02,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:02,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:02,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005112987] [2022-07-22 16:42:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:02,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:02,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:02,308 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 16:42:02,308 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 16:42:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:42:02,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 16:42:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 16:42:03,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 16:42:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907425489] [2022-07-22 16:42:03,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:03,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005112987] [2022-07-22 16:42:03,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005112987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:03,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:03,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-22 16:42:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538725972] [2022-07-22 16:42:03,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:03,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 16:42:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 16:42:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:42:03,958 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 16:42:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:04,839 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-22 16:42:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:42:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-07-22 16:42:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:04,841 INFO L225 Difference]: With dead ends: 79 [2022-07-22 16:42:04,841 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 16:42:04,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:42:04,842 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:04,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 97 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:42:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 16:42:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-07-22 16:42:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.22) internal successors, (61), 53 states have internal predecessors, (61), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:42:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2022-07-22 16:42:04,860 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 33 [2022-07-22 16:42:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:04,860 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2022-07-22 16:42:04,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 16:42:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2022-07-22 16:42:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 16:42:04,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:04,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:04,880 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 16:42:05,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:05,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2022-07-22 16:42:05,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:05,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127104440] [2022-07-22 16:42:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:05,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:05,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:05,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493597054] [2022-07-22 16:42:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:05,099 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 16:42:05,100 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 16:42:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:42:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 16:42:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 16:42:05,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 16:42:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127104440] [2022-07-22 16:42:05,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:05,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493597054] [2022-07-22 16:42:05,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493597054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:05,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:05,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-22 16:42:05,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103582757] [2022-07-22 16:42:05,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:05,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:42:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:42:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:42:05,292 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 16:42:07,303 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 16:42:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:07,363 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-07-22 16:42:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:42:07,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-07-22 16:42:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:07,364 INFO L225 Difference]: With dead ends: 76 [2022-07-22 16:42:07,364 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 16:42:07,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:42:07,365 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:07,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 16:42:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 16:42:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-07-22 16:42:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:42:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-07-22 16:42:07,374 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 39 [2022-07-22 16:42:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:07,378 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-07-22 16:42:07,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 16:42:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-07-22 16:42:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 16:42:07,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:07,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:07,405 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 16:42:07,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:07,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash -196098865, now seen corresponding path program 1 times [2022-07-22 16:42:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:07,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155551902] [2022-07-22 16:42:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:07,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:07,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966992384] [2022-07-22 16:42:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:07,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:07,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:07,626 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 16:42:07,644 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 16:42:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:42:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 16:42:07,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 16:42:07,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 16:42:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155551902] [2022-07-22 16:42:08,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966992384] [2022-07-22 16:42:08,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966992384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:08,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:08,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-07-22 16:42:08,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140792338] [2022-07-22 16:42:08,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 16:42:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 16:42:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:42:08,244 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-07-22 16:42:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:08,594 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-07-22 16:42:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 16:42:08,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 51 [2022-07-22 16:42:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:08,595 INFO L225 Difference]: With dead ends: 113 [2022-07-22 16:42:08,595 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 16:42:08,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 16:42:08,596 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:08,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:42:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 16:42:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-07-22 16:42:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.0625) internal successors, (51), 51 states have internal predecessors, (51), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:42:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2022-07-22 16:42:08,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 51 [2022-07-22 16:42:08,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:08,604 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2022-07-22 16:42:08,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-07-22 16:42:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2022-07-22 16:42:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 16:42:08,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:08,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:08,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:42:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:08,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1217167219, now seen corresponding path program 2 times [2022-07-22 16:42:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:08,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326494390] [2022-07-22 16:42:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:08,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:08,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:08,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046606836] [2022-07-22 16:42:08,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:08,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:08,858 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 16:42:08,859 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 16:42:08,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:08,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 16:42:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 16:42:18,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:26,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:26,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326494390] [2022-07-22 16:42:26,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:26,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046606836] [2022-07-22 16:42:26,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046606836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:42:26,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:42:26,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-22 16:42:26,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078881386] [2022-07-22 16:42:26,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:26,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 16:42:26,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 16:42:26,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=368, Unknown=1, NotChecked=0, Total=462 [2022-07-22 16:42:26,773 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-22 16:42:29,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:31,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:34,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:34,491 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-07-22 16:42:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:42:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2022-07-22 16:42:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:34,492 INFO L225 Difference]: With dead ends: 80 [2022-07-22 16:42:34,492 INFO L226 Difference]: Without dead ends: 78 [2022-07-22 16:42:34,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=106, Invalid=445, Unknown=1, NotChecked=0, Total=552 [2022-07-22 16:42:34,493 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:34,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 197 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 354 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-07-22 16:42:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-22 16:42:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-07-22 16:42:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 58 states have internal predecessors, (58), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 16:42:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-07-22 16:42:34,504 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 51 [2022-07-22 16:42:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:34,504 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-07-22 16:42:34,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-22 16:42:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-07-22 16:42:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 16:42:34,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:34,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:34,525 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 16:42:34,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:34,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash -55550255, now seen corresponding path program 3 times [2022-07-22 16:42:34,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:34,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439447011] [2022-07-22 16:42:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:34,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:34,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:34,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187241684] [2022-07-22 16:42:34,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:42:34,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:34,720 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 16:42:34,721 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 16:42:34,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 16:42:34,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:34,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 16:42:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 16:42:35,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 16:42:36,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:36,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439447011] [2022-07-22 16:42:36,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:36,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187241684] [2022-07-22 16:42:36,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187241684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:36,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:36,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-07-22 16:42:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007030826] [2022-07-22 16:42:36,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:36,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 16:42:36,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 16:42:36,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-22 16:42:36,451 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 16:42:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:37,104 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2022-07-22 16:42:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:42:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-07-22 16:42:37,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:37,105 INFO L225 Difference]: With dead ends: 87 [2022-07-22 16:42:37,106 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 16:42:37,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:42:37,106 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:37,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 180 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 16:42:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 16:42:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-22 16:42:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:42:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-22 16:42:37,110 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 51 [2022-07-22 16:42:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:37,110 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-22 16:42:37,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 16:42:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-22 16:42:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 16:42:37,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:37,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:37,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 16:42:37,318 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,SelfDestructingSolverStorable8 [2022-07-22 16:42:37,319 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash 743390522, now seen corresponding path program 2 times [2022-07-22 16:42:37,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:37,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036853846] [2022-07-22 16:42:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:37,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:37,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338734440] [2022-07-22 16:42:37,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:37,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:37,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:37,352 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 16:42:37,353 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 16:42:37,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 16:42:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 16:42:37,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:42:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036853846] [2022-07-22 16:42:37,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338734440] [2022-07-22 16:42:37,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338734440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:42:37,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:42:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 16:42:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535687118] [2022-07-22 16:42:37,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:42:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:42:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:42:37,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:42:37,588 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-22 16:42:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:37,778 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-07-22 16:42:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:42:37,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 60 [2022-07-22 16:42:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:37,779 INFO L225 Difference]: With dead ends: 49 [2022-07-22 16:42:37,779 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 16:42:37,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:42:37,780 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:37,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:42:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 16:42:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 16:42:37,780 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 16:42:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 16:42:37,781 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2022-07-22 16:42:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:37,781 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 16:42:37,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-22 16:42:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 16:42:37,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 16:42:37,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 16:42:37,805 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 16:42:37,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 16:42:37,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 16:42:39,640 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-22 16:42:39,640 INFO L902 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-07-22 16:42:39,640 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 10)) [2022-07-22 16:42:39,640 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-07-22 16:42:39,640 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-07-22 16:42:39,640 INFO L902 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2022-07-22 16:42:39,640 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (let ((.cse2 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse4 (+ |ULTIMATE.start_main_~y~0#1| 1)) (.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse5 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse3)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 10))) (or (and (= |ULTIMATE.start_main_~y~0#1| (div |ULTIMATE.start_main_~b~0#1| 2)) .cse0 .cse1 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse2 (not (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1))) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~y~0#1| 4) .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) .cse1 (= .cse3 (+ |ULTIMATE.start_main_~z~0#1| (* 2 (* (div |ULTIMATE.start_main_~x~0#1| 2) |ULTIMATE.start_main_~y~0#1|)))) (< 0 .cse4)) (and (< |ULTIMATE.start_main_~y~0#1| 2) (<= 1 (mod .cse4 2)) .cse0 .cse5 .cse1 (<= 0 .cse4)) (and (< 0 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse5 .cse1 (< |ULTIMATE.start_main_~y~0#1| 3))))) [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse1 (* (* |ULTIMATE.start_main_~x~0#1| (div |ULTIMATE.start_main_~y~0#1| 2)) 2)) (.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (= .cse0 (+ |ULTIMATE.start_main_~z~0#1| .cse1)) (<= 1 |ULTIMATE.start_main_~b~0#1|) (or (= (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1| .cse1) .cse0) (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0)) (= |ULTIMATE.start_main_~z~0#1| .cse0))) [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (let ((.cse2 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse4 (+ |ULTIMATE.start_main_~y~0#1| 1)) (.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse5 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse3)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 10))) (or (and (= |ULTIMATE.start_main_~y~0#1| (div |ULTIMATE.start_main_~b~0#1| 2)) .cse0 .cse1 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse2 (not (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1))) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~y~0#1| 4) .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) .cse1 (= .cse3 (+ |ULTIMATE.start_main_~z~0#1| (* 2 (* (div |ULTIMATE.start_main_~x~0#1| 2) |ULTIMATE.start_main_~y~0#1|)))) (< 0 .cse4)) (and (< |ULTIMATE.start_main_~y~0#1| 2) (<= 1 (mod .cse4 2)) .cse0 .cse5 .cse1 (<= 0 .cse4)) (and (< 0 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse5 .cse1 (< |ULTIMATE.start_main_~y~0#1| 3))))) [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-07-22 16:42:39,641 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-07-22 16:42:39,642 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-07-22 16:42:39,642 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-07-22 16:42:39,642 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-07-22 16:42:39,644 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-07-22 16:42:39,645 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 16:42:39,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 04:42:39 BoogieIcfgContainer [2022-07-22 16:42:39,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 16:42:39,671 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 16:42:39,671 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 16:42:39,671 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 16:42:39,672 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:41:35" (3/4) ... [2022-07-22 16:42:39,674 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 16:42:39,679 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-07-22 16:42:39,680 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-22 16:42:39,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-22 16:42:39,683 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-22 16:42:39,683 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-22 16:42:39,683 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 16:42:39,708 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 16:42:39,708 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 16:42:39,709 INFO L158 Benchmark]: Toolchain (without parser) took 64492.55ms. Allocated memory was 138.4MB in the beginning and 174.1MB in the end (delta: 35.7MB). Free memory was 106.7MB in the beginning and 84.5MB in the end (delta: 22.2MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. [2022-07-22 16:42:39,709 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 40.5MB in the beginning and 40.5MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 16:42:39,709 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.47ms. Allocated memory is still 138.4MB. Free memory was 106.4MB in the beginning and 113.2MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 16:42:39,709 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.49ms. Allocated memory is still 138.4MB. Free memory was 113.2MB in the beginning and 111.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 16:42:39,709 INFO L158 Benchmark]: Boogie Preprocessor took 25.09ms. Allocated memory is still 138.4MB. Free memory was 111.5MB in the beginning and 110.6MB in the end (delta: 898.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 16:42:39,710 INFO L158 Benchmark]: RCFGBuilder took 255.10ms. Allocated memory is still 138.4MB. Free memory was 110.6MB in the beginning and 100.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 16:42:39,711 INFO L158 Benchmark]: TraceAbstraction took 63968.15ms. Allocated memory was 138.4MB in the beginning and 174.1MB in the end (delta: 35.7MB). Free memory was 100.5MB in the beginning and 87.7MB in the end (delta: 12.8MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. [2022-07-22 16:42:39,711 INFO L158 Benchmark]: Witness Printer took 37.59ms. Allocated memory is still 174.1MB. Free memory was 87.7MB in the beginning and 84.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 16:42:39,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 40.5MB in the beginning and 40.5MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.47ms. Allocated memory is still 138.4MB. Free memory was 106.4MB in the beginning and 113.2MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.49ms. Allocated memory is still 138.4MB. Free memory was 113.2MB in the beginning and 111.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.09ms. Allocated memory is still 138.4MB. Free memory was 111.5MB in the beginning and 110.6MB in the end (delta: 898.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 255.10ms. Allocated memory is still 138.4MB. Free memory was 110.6MB in the beginning and 100.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 63968.15ms. Allocated memory was 138.4MB in the beginning and 174.1MB in the end (delta: 35.7MB). Free memory was 100.5MB in the beginning and 87.7MB in the end (delta: 12.8MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. * Witness Printer took 37.59ms. Allocated memory is still 174.1MB. Free memory was 87.7MB in the beginning and 84.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 15]: 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 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 63.9s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 28.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 195 SdHoareTripleChecker+Valid, 21.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 186 mSDsluCounter, 1183 SdHoareTripleChecker+Invalid, 21.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 960 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1606 IncrementalHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 223 mSDtfsCounter, 1606 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 640 GetRequests, 482 SyntacticMatches, 8 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 19.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=8, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 18 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 34 PreInvPairs, 60 NumberOfFragments, 314 HoareAnnotationTreeSize, 34 FomulaSimplifications, 169 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 891 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 31.2s InterpolantComputationTime, 396 NumberOfCodeBlocks, 387 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 588 ConstructedInterpolants, 0 QuantifiedInterpolants, 2885 SizeOfPredicates, 34 NumberOfNonLiveVariables, 958 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 427/485 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: 34]: Loop Invariant Derived loop invariant: ((((((((y == b / 2 && 1 <= b) && b <= 10) && x == 2 * a) && z == 0) && !(b % 2 == 1)) || ((((b == y && 1 <= b) && b <= 10) && z == 0) && a == x)) || (((((y <= 4 && 1 <= b) && x % 2 == 0) && b <= 10) && a * b == z + 2 * (x / 2 * y)) && 0 < y + 1)) || (((((y < 2 && 1 <= (y + 1) % 2) && 1 <= b) && z + x * y == a * b) && b <= 10) && 0 <= y + 1)) || ((((0 < y && 1 <= b) && z + x * y == a * b) && b <= 10) && y < 3) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-22 16:42:39,752 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