./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_valuebound5.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 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:34:22,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:34:22,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:34:22,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:34:22,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:34:22,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:34:22,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:34:22,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:34:22,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:34:22,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:34:22,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:34:22,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:34:22,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:34:22,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:34:22,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:34:22,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:34:22,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:34:22,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:34:22,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:34:22,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:34:22,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:34:22,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:34:22,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:34:22,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:34:22,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:34:22,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:34:22,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:34:22,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:34:22,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:34:22,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:34:22,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:34:22,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:34:22,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:34:22,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:34:22,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:34:22,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:34:22,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:34:22,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:34:22,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:34:22,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:34:22,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:34:22,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:34:22,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:34:22,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:34:22,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:34:22,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:34:22,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:34:22,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:34:22,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:34:22,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:34:22,279 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:34:22,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:34:22,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:34:22,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:34:22,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:34:22,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:34:22,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:34:22,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:34:22,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:34:22,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:34:22,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:34:22,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:34:22,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:34:22,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:34:22,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:34:22,282 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:34:22,282 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:34:22,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:34:22,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:34:22,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a [2021-12-16 00:34:22,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:34:22,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:34:22,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:34:22,499 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:34:22,500 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:34:22,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-12-16 00:34:22,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/053aed111/5341be646fe145b3ad34b1f08507cab0/FLAG5da0c5179 [2021-12-16 00:34:22,900 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:34:22,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-12-16 00:34:22,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/053aed111/5341be646fe145b3ad34b1f08507cab0/FLAG5da0c5179 [2021-12-16 00:34:22,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/053aed111/5341be646fe145b3ad34b1f08507cab0 [2021-12-16 00:34:22,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:34:22,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:34:22,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:34:22,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:34:22,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:34:22,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:34:22" (1/1) ... [2021-12-16 00:34:22,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cb2ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:22, skipping insertion in model container [2021-12-16 00:34:22,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:34:22" (1/1) ... [2021-12-16 00:34:22,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:34:22,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:34:23,071 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_valuebound5.c[537,550] [2021-12-16 00:34:23,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:34:23,087 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:34:23,096 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_valuebound5.c[537,550] [2021-12-16 00:34:23,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:34:23,114 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:34:23,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23 WrapperNode [2021-12-16 00:34:23,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:34:23,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:34:23,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:34:23,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:34:23,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,138 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-12-16 00:34:23,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:34:23,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:34:23,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:34:23,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:34:23,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:34:23,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:34:23,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:34:23,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:34:23,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (1/1) ... [2021-12-16 00:34:23,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:34:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:23,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 00:34:23,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 00:34:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:34:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 00:34:23,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 00:34:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:34:23,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:34:23,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:34:23,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 00:34:23,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 00:34:23,278 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:34:23,280 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:34:23,373 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:34:23,376 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:34:23,376 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 00:34:23,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:34:23 BoogieIcfgContainer [2021-12-16 00:34:23,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:34:23,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:34:23,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:34:23,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:34:23,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:34:22" (1/3) ... [2021-12-16 00:34:23,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@818f69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:34:23, skipping insertion in model container [2021-12-16 00:34:23,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:34:23" (2/3) ... [2021-12-16 00:34:23,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@818f69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:34:23, skipping insertion in model container [2021-12-16 00:34:23,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:34:23" (3/3) ... [2021-12-16 00:34:23,398 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2021-12-16 00:34:23,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:34:23,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:34:23,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:34:23,459 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 00:34:23,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:34:23,470 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) [2021-12-16 00:34:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 00:34:23,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:23,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:34:23,474 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2021-12-16 00:34:23,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128971210] [2021-12-16 00:34:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:23,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:23,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:34:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:34:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:23,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:34:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:34:23,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:23,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128971210] [2021-12-16 00:34:23,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128971210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:34:23,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:34:23,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:34:23,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474252650] [2021-12-16 00:34:23,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:34:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:34:23,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:34:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:34:23,650 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) [2021-12-16 00:34:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:23,665 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-12-16 00:34:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:34:23,667 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 [2021-12-16 00:34:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:23,671 INFO L225 Difference]: With dead ends: 51 [2021-12-16 00:34:23,671 INFO L226 Difference]: Without dead ends: 23 [2021-12-16 00:34:23,673 INFO L932 BasicCegarLoop]: 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 [2021-12-16 00:34:23,679 INFO L933 BasicCegarLoop]: 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 [2021-12-16 00:34:23,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:34:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-16 00:34:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-16 00:34:23,707 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) [2021-12-16 00:34:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-16 00:34:23,709 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2021-12-16 00:34:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:23,709 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-16 00:34:23,709 INFO L471 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) [2021-12-16 00:34:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-16 00:34:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 00:34:23,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:23,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:34:23,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:34:23,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2021-12-16 00:34:23,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:23,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102362812] [2021-12-16 00:34:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:23,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:23,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:34:23,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680686350] [2021-12-16 00:34:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:23,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:23,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:23,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:34:23,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:34:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 00:34:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:34:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:34:23,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:34:23,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102362812] [2021-12-16 00:34:23,936 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:34:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680686350] [2021-12-16 00:34:23,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680686350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:34:23,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:34:23,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:34:23,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801110741] [2021-12-16 00:34:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:34:23,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:34:23,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:34:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:34:23,943 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) [2021-12-16 00:34:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:24,003 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-12-16 00:34:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:34:24,004 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 [2021-12-16 00:34:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:24,005 INFO L225 Difference]: With dead ends: 35 [2021-12-16 00:34:24,005 INFO L226 Difference]: Without dead ends: 33 [2021-12-16 00:34:24,006 INFO L932 BasicCegarLoop]: 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 [2021-12-16 00:34:24,007 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:34:24,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:34:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-16 00:34:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-12-16 00:34:24,020 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) [2021-12-16 00:34:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-16 00:34:24,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2021-12-16 00:34:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:24,023 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-16 00:34:24,023 INFO L471 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) [2021-12-16 00:34:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-16 00:34:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 00:34:24,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:24,025 INFO L514 BasicCegarLoop]: 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] [2021-12-16 00:34:24,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:34:24,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:24,241 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2021-12-16 00:34:24,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:24,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485749342] [2021-12-16 00:34:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:24,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:24,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:34:24,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593265801] [2021-12-16 00:34:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:24,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:24,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:34:24,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:34:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:34:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:34:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:34:24,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:34:24,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:24,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485749342] [2021-12-16 00:34:24,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:34:24,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593265801] [2021-12-16 00:34:24,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593265801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:34:24,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:34:24,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 00:34:24,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148808234] [2021-12-16 00:34:24,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:34:24,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 00:34:24,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 00:34:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:34:24,393 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) [2021-12-16 00:34:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:24,450 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-16 00:34:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:34:24,450 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 [2021-12-16 00:34:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:24,451 INFO L225 Difference]: With dead ends: 39 [2021-12-16 00:34:24,451 INFO L226 Difference]: Without dead ends: 32 [2021-12-16 00:34:24,452 INFO L932 BasicCegarLoop]: 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 [2021-12-16 00:34:24,452 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:34:24,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:34:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-16 00:34:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-16 00:34:24,456 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) [2021-12-16 00:34:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-16 00:34:24,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2021-12-16 00:34:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:24,456 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-16 00:34:24,457 INFO L471 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) [2021-12-16 00:34:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-16 00:34:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 00:34:24,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:24,457 INFO L514 BasicCegarLoop]: 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] [2021-12-16 00:34:24,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:34:24,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 00:34:24,658 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2021-12-16 00:34:24,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:24,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174731394] [2021-12-16 00:34:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:24,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:34:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159433666] [2021-12-16 00:34:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:24,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:24,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:24,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:34:24,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:34:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 00:34:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:34:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:34:25,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:34:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:34:28,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174731394] [2021-12-16 00:34:28,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:34:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159433666] [2021-12-16 00:34:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159433666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:34:28,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:34:28,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-12-16 00:34:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121625352] [2021-12-16 00:34:28,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:34:28,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 00:34:28,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 00:34:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:34:28,104 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 00:34:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:29,460 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-12-16 00:34:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 00:34:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 33 [2021-12-16 00:34:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:29,463 INFO L225 Difference]: With dead ends: 48 [2021-12-16 00:34:29,463 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 00:34:29,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-12-16 00:34:29,464 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:34:29,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 127 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 00:34:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 00:34:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-16 00:34:29,468 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) [2021-12-16 00:34:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-16 00:34:29,469 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 33 [2021-12-16 00:34:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:29,469 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-16 00:34:29,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 00:34:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-16 00:34:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 00:34:29,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:29,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:34:29,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:34:29,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:29,684 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2021-12-16 00:34:29,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:29,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649150306] [2021-12-16 00:34:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:29,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:29,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:34:29,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673213272] [2021-12-16 00:34:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:29,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:29,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:34:29,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:34:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:29,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 00:34:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:34:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:34:29,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:34:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:34:29,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:29,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649150306] [2021-12-16 00:34:29,993 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:34:29,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673213272] [2021-12-16 00:34:29,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673213272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:34:29,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:34:29,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-16 00:34:29,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131135010] [2021-12-16 00:34:29,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:34:29,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 00:34:29,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 00:34:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:34:29,995 INFO L87 Difference]: Start difference. First operand 43 states and 51 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) [2021-12-16 00:34:32,001 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 [] [2021-12-16 00:34:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:32,097 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-16 00:34:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:34:32,097 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 [2021-12-16 00:34:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:32,098 INFO L225 Difference]: With dead ends: 50 [2021-12-16 00:34:32,098 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 00:34:32,098 INFO L932 BasicCegarLoop]: 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 [2021-12-16 00:34:32,099 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:34:32,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 00:34:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 00:34:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-12-16 00:34:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 00:34:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-16 00:34:32,104 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 39 [2021-12-16 00:34:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:32,104 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-16 00:34:32,104 INFO L471 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) [2021-12-16 00:34:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-16 00:34:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 00:34:32,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:32,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:34:32,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:34:32,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:32,315 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1683883622, now seen corresponding path program 1 times [2021-12-16 00:34:32,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:32,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204025079] [2021-12-16 00:34:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:32,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:32,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:34:32,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342632373] [2021-12-16 00:34:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:32,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:32,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:32,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:34:32,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:34:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:32,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 00:34:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:34:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:34:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:34:36,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204025079] [2021-12-16 00:34:36,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:34:36,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342632373] [2021-12-16 00:34:36,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342632373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:34:36,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:34:36,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-16 00:34:36,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335763314] [2021-12-16 00:34:36,915 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 00:34:36,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 00:34:36,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 00:34:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-12-16 00:34:36,917 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 00:34:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:37,217 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-12-16 00:34:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 00:34:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2021-12-16 00:34:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:37,219 INFO L225 Difference]: With dead ends: 78 [2021-12-16 00:34:37,219 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 00:34:37,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-12-16 00:34:37,220 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:34:37,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 143 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:34:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 00:34:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-16 00:34:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 00:34:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-12-16 00:34:37,228 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 42 [2021-12-16 00:34:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:37,228 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-12-16 00:34:37,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 00:34:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-12-16 00:34:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 00:34:37,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:34:37,229 INFO L514 BasicCegarLoop]: 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] [2021-12-16 00:34:37,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 00:34:37,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:37,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:34:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:34:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash -196098865, now seen corresponding path program 1 times [2021-12-16 00:34:37,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:34:37,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216828327] [2021-12-16 00:34:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:37,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:34:37,454 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:34:37,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069449260] [2021-12-16 00:34:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:34:37,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:37,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:34:37,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:34:37,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:34:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:34:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 00:34:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:34:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:34:37,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:34:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:34:38,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:34:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216828327] [2021-12-16 00:34:38,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:34:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069449260] [2021-12-16 00:34:38,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069449260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:34:38,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:34:38,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-12-16 00:34:38,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988053839] [2021-12-16 00:34:38,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:34:38,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 00:34:38,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:34:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 00:34:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:34:38,049 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-16 00:34:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:34:38,287 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-12-16 00:34:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 00:34:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 51 [2021-12-16 00:34:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:34:38,288 INFO L225 Difference]: With dead ends: 73 [2021-12-16 00:34:38,288 INFO L226 Difference]: Without dead ends: 0 [2021-12-16 00:34:38,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-12-16 00:34:38,289 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:34:38,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 101 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:34:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-16 00:34:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-16 00:34:38,290 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) [2021-12-16 00:34:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-16 00:34:38,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-12-16 00:34:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:34:38,290 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 00:34:38,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-16 00:34:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-16 00:34:38,291 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-16 00:34:38,293 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-16 00:34:38,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:34:38,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:34:38,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-16 00:34:39,023 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-16 00:34:39,023 INFO L861 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2021-12-16 00:34:39,023 INFO L854 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~b~0#1| 5) (<= 0 |ULTIMATE.start_main_~b~0#1|)) [2021-12-16 00:34:39,023 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L861 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse5 (* 2 |ULTIMATE.start_main_~y~0#1|))) (let ((.cse0 (< 0 (+ .cse5 2))) (.cse2 (= 1 (mod |ULTIMATE.start_main_~b~0#1| 2))) (.cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse4 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (.cse6 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 5))) (or (and (= |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~y~0#1| (div (+ |ULTIMATE.start_main_~b~0#1| (- 1)) 2)) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|))) (and .cse3 .cse4 (<= .cse5 4) .cse6 .cse0 .cse1 (not .cse2)) (and .cse3 .cse4 (not (= 0 (+ |ULTIMATE.start_main_~y~0#1| 1))) (<= .cse5 2) (< 0 (+ .cse5 4)) .cse1) (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~a~0#1|) .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|))))) [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0) (<= |ULTIMATE.start_main_~b~0#1| 5))) [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-12-16 00:34:39,024 INFO L858 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2021-12-16 00:34:39,025 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse5 (* 2 |ULTIMATE.start_main_~y~0#1|))) (let ((.cse0 (< 0 (+ .cse5 2))) (.cse2 (= 1 (mod |ULTIMATE.start_main_~b~0#1| 2))) (.cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse4 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (.cse6 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 5))) (or (and (= |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~y~0#1| (div (+ |ULTIMATE.start_main_~b~0#1| (- 1)) 2)) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|))) (and .cse3 .cse4 (<= .cse5 4) .cse6 .cse0 .cse1 (not .cse2)) (and .cse3 .cse4 (not (= 0 (+ |ULTIMATE.start_main_~y~0#1| 1))) (<= .cse5 2) (< 0 (+ .cse5 4)) .cse1) (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~a~0#1|) .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|))))) [2021-12-16 00:34:39,025 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2021-12-16 00:34:39,025 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2021-12-16 00:34:39,025 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-12-16 00:34:39,025 INFO L858 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2021-12-16 00:34:39,025 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-12-16 00:34:39,025 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2021-12-16 00:34:39,025 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-12-16 00:34:39,026 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-12-16 00:34:39,026 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2021-12-16 00:34:39,026 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2021-12-16 00:34:39,026 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-12-16 00:34:39,028 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:34:39,029 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 00:34:39,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:34:39 BoogieIcfgContainer [2021-12-16 00:34:39,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 00:34:39,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 00:34:39,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 00:34:39,049 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 00:34:39,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:34:23" (3/4) ... [2021-12-16 00:34:39,051 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-16 00:34:39,055 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-16 00:34:39,057 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-16 00:34:39,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-16 00:34:39,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-16 00:34:39,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-16 00:34:39,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-16 00:34:39,080 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-16 00:34:39,080 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 00:34:39,081 INFO L158 Benchmark]: Toolchain (without parser) took 16157.01ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 64.1MB in the beginning and 44.3MB in the end (delta: 19.9MB). Peak memory consumption was 42.7MB. Max. memory is 16.1GB. [2021-12-16 00:34:39,081 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 00:34:39,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.37ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 76.6MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 00:34:39,082 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.23ms. Allocated memory is still 100.7MB. Free memory was 76.6MB in the beginning and 74.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 00:34:39,082 INFO L158 Benchmark]: Boogie Preprocessor took 31.23ms. Allocated memory is still 100.7MB. Free memory was 74.9MB in the beginning and 74.0MB in the end (delta: 899.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 00:34:39,082 INFO L158 Benchmark]: RCFGBuilder took 206.34ms. Allocated memory is still 100.7MB. Free memory was 74.0MB in the beginning and 64.8MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 00:34:39,082 INFO L158 Benchmark]: TraceAbstraction took 15670.26ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 64.2MB in the beginning and 47.4MB in the end (delta: 16.7MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. [2021-12-16 00:34:39,083 INFO L158 Benchmark]: Witness Printer took 31.45ms. Allocated memory is still 123.7MB. Free memory was 47.4MB in the beginning and 44.3MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 00:34:39,084 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 100.7MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.37ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 76.6MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.23ms. Allocated memory is still 100.7MB. Free memory was 76.6MB in the beginning and 74.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.23ms. Allocated memory is still 100.7MB. Free memory was 74.9MB in the beginning and 74.0MB in the end (delta: 899.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 206.34ms. Allocated memory is still 100.7MB. Free memory was 74.0MB in the beginning and 64.8MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 15670.26ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 64.2MB in the beginning and 47.4MB in the end (delta: 16.7MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. * Witness Printer took 31.45ms. Allocated memory is still 123.7MB. Free memory was 47.4MB in the beginning and 44.3MB in the end (delta: 3.2MB). 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: 15.6s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 138 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 131 mSDsluCounter, 636 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 76 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 743 IncrementalHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 76 mSolverCounterUnsat, 147 mSDtfsCounter, 743 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 286 SyntacticMatches, 14 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=6, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 26 PreInvPairs, 42 NumberOfFragments, 271 HoareAnnotationTreeSize, 26 FomulaSimplifications, 68 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 259 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 1662 SizeOfPredicates, 23 NumberOfNonLiveVariables, 598 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 222/247 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: (((((((z == a && y == (b + -1) / 2) && 0 < 2 * y + 2) && b <= 5) && 1 == b % 2) && x == 2 * a) || ((((((1 <= b && y * x + z == a * b) && 2 * y <= 4) && z == 0) && 0 < 2 * y + 2) && b <= 5) && !(1 == b % 2))) || (((((1 <= b && y * x + z == a * b) && !(0 == y + 1)) && 2 * y <= 2) && 0 < 2 * y + 4) && b <= 5)) || ((((y == b && x == a) && z == 0) && b <= 5) && 1 <= y) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-16 00:34:39,102 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