./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/loops/sum01-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cba8acfa381c990ec40e4bf9e5d202ee845a576 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-27 23:59:40,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:59:40,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:59:40,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:59:40,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:59:40,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:59:40,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:59:40,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:59:40,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:59:40,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:59:40,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:59:40,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:59:40,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:59:40,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:59:40,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:59:40,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:59:40,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:59:40,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:59:40,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:59:40,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:59:40,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:59:40,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:59:40,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:59:40,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:59:40,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:59:40,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:59:40,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:59:40,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:59:40,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:59:40,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:59:40,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:59:40,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:59:40,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:59:40,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:59:40,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:59:40,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:59:40,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:59:40,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:59:40,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:59:40,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:59:40,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:59:40,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:59:40,312 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:59:40,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:59:40,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:59:40,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:59:40,314 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:59:40,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:59:40,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:59:40,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:59:40,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:59:40,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:59:40,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:59:40,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:59:40,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:59:40,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:59:40,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:59:40,318 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:59:40,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:59:40,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:59:40,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:59:40,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:59:40,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:59:40,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:59:40,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:59:40,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:59:40,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:59:40,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:59:40,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:59:40,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:59:40,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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(__VERIFIER_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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2019-11-27 23:59:40,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:59:40,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:59:40,631 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:59:40,632 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:59:40,633 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:59:40,634 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01-1.i [2019-11-27 23:59:40,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c826e7d8/740383649b984bc482ad68c412b754c4/FLAGae2ad1ef6 [2019-11-27 23:59:41,141 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:59:41,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i [2019-11-27 23:59:41,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c826e7d8/740383649b984bc482ad68c412b754c4/FLAGae2ad1ef6 [2019-11-27 23:59:41,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c826e7d8/740383649b984bc482ad68c412b754c4 [2019-11-27 23:59:41,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:59:41,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:59:41,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:59:41,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:59:41,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:59:41,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34aca8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41, skipping insertion in model container [2019-11-27 23:59:41,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:59:41,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:59:41,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:59:41,761 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:59:41,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:59:41,788 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:59:41,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41 WrapperNode [2019-11-27 23:59:41,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:59:41,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:59:41,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:59:41,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:59:41,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:59:41,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:59:41,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:59:41,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:59:41,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... [2019-11-27 23:59:41,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:59:41,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:59:41,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:59:41,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:59:41,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:59:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:59:41,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:59:42,112 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:59:42,112 INFO L297 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-27 23:59:42,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:42 BoogieIcfgContainer [2019-11-27 23:59:42,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:59:42,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:59:42,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:59:42,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:59:42,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:59:41" (1/3) ... [2019-11-27 23:59:42,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad56db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:59:42, skipping insertion in model container [2019-11-27 23:59:42,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:41" (2/3) ... [2019-11-27 23:59:42,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad56db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:59:42, skipping insertion in model container [2019-11-27 23:59:42,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:42" (3/3) ... [2019-11-27 23:59:42,120 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-11-27 23:59:42,129 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:59:42,136 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:59:42,148 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:59:42,168 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:59:42,168 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:59:42,168 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:59:42,169 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:59:42,169 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:59:42,169 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:59:42,169 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:59:42,169 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:59:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-27 23:59:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-27 23:59:42,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:42,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-27 23:59:42,185 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-11-27 23:59:42,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:42,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319122824] [2019-11-27 23:59:42,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:42,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319122824] [2019-11-27 23:59:42,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:59:42,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:59:42,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903903628] [2019-11-27 23:59:42,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:59:42,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:59:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:59:42,345 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-27 23:59:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:42,360 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-27 23:59:42,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:59:42,362 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-27 23:59:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:42,370 INFO L225 Difference]: With dead ends: 18 [2019-11-27 23:59:42,370 INFO L226 Difference]: Without dead ends: 8 [2019-11-27 23:59:42,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:59:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-27 23:59:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-27 23:59:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-27 23:59:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-27 23:59:42,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-27 23:59:42,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:42,408 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-27 23:59:42,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:59:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-27 23:59:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-27 23:59:42,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:42,409 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-27 23:59:42,409 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-11-27 23:59:42,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:42,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574115466] [2019-11-27 23:59:42,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:42,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574115466] [2019-11-27 23:59:42,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:59:42,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 23:59:42,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350472977] [2019-11-27 23:59:42,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:59:42,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:59:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:59:42,554 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-27 23:59:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:42,660 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-27 23:59:42,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:59:42,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-27 23:59:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:42,665 INFO L225 Difference]: With dead ends: 15 [2019-11-27 23:59:42,665 INFO L226 Difference]: Without dead ends: 11 [2019-11-27 23:59:42,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:59:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-27 23:59:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-27 23:59:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-27 23:59:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-27 23:59:42,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2019-11-27 23:59:42,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:42,670 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-27 23:59:42,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:59:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-27 23:59:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-27 23:59:42,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:42,671 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:42,672 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-11-27 23:59:42,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:42,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649534676] [2019-11-27 23:59:42,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:42,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649534676] [2019-11-27 23:59:42,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448312873] [2019-11-27 23:59:42,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:42,935 WARN L253 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-27 23:59:42,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:43,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 23:59:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:43,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:43,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-27 23:59:43,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151495568] [2019-11-27 23:59:43,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-27 23:59:43,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-27 23:59:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-27 23:59:43,100 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 14 states. [2019-11-27 23:59:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:43,398 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-27 23:59:43,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-27 23:59:43,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2019-11-27 23:59:43,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:43,400 INFO L225 Difference]: With dead ends: 31 [2019-11-27 23:59:43,400 INFO L226 Difference]: Without dead ends: 17 [2019-11-27 23:59:43,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-27 23:59:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-27 23:59:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-27 23:59:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-27 23:59:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-27 23:59:43,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-11-27 23:59:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:43,413 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-27 23:59:43,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-27 23:59:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-27 23:59:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 23:59:43,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:43,415 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-11-27 23:59:43,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:43,616 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1111984220, now seen corresponding path program 2 times [2019-11-27 23:59:43,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:43,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721867900] [2019-11-27 23:59:43,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-27 23:59:43,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721867900] [2019-11-27 23:59:43,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672269219] [2019-11-27 23:59:43,872 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-27 23:59:43,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:59:43,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:43,906 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-27 23:59:43,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:44,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 23:59:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:44,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:44,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-27 23:59:44,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884489498] [2019-11-27 23:59:44,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-27 23:59:44,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-27 23:59:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-27 23:59:44,172 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 19 states. [2019-11-27 23:59:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:44,776 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-27 23:59:44,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-27 23:59:44,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2019-11-27 23:59:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:44,778 INFO L225 Difference]: With dead ends: 34 [2019-11-27 23:59:44,778 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 23:59:44,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-11-27 23:59:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 23:59:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-27 23:59:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-27 23:59:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-27 23:59:44,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-27 23:59:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:44,790 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-27 23:59:44,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-27 23:59:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-27 23:59:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-27 23:59:44,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:44,792 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:44,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:44,993 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:44,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1125442374, now seen corresponding path program 1 times [2019-11-27 23:59:44,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:44,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804499076] [2019-11-27 23:59:44,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804499076] [2019-11-27 23:59:45,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500875751] [2019-11-27 23:59:45,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:45,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 23:59:45,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:45,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-27 23:59:45,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698119334] [2019-11-27 23:59:45,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-27 23:59:45,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:45,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-27 23:59:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:59:45,123 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-11-27 23:59:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:45,172 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-27 23:59:45,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-27 23:59:45,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-27 23:59:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:45,173 INFO L225 Difference]: With dead ends: 33 [2019-11-27 23:59:45,173 INFO L226 Difference]: Without dead ends: 26 [2019-11-27 23:59:45,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:59:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-27 23:59:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-27 23:59:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-27 23:59:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-27 23:59:45,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2019-11-27 23:59:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:45,179 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-27 23:59:45,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-27 23:59:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-27 23:59:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-27 23:59:45,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:45,180 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:45,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:45,381 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash -622858099, now seen corresponding path program 2 times [2019-11-27 23:59:45,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:45,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374654996] [2019-11-27 23:59:45,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374654996] [2019-11-27 23:59:45,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024479714] [2019-11-27 23:59:45,450 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-27 23:59:45,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:59:45,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:45,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-27 23:59:45,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:45,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-27 23:59:45,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505056712] [2019-11-27 23:59:45,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-27 23:59:45,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-27 23:59:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-27 23:59:45,497 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2019-11-27 23:59:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:45,543 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-27 23:59:45,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-27 23:59:45,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-27 23:59:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:45,547 INFO L225 Difference]: With dead ends: 36 [2019-11-27 23:59:45,547 INFO L226 Difference]: Without dead ends: 29 [2019-11-27 23:59:45,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-27 23:59:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-27 23:59:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-27 23:59:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-27 23:59:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-27 23:59:45,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-27 23:59:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:45,561 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-27 23:59:45,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-27 23:59:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-27 23:59:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-27 23:59:45,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:45,562 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:45,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:45,765 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash -390715430, now seen corresponding path program 3 times [2019-11-27 23:59:45,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:45,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445535385] [2019-11-27 23:59:45,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445535385] [2019-11-27 23:59:45,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920192058] [2019-11-27 23:59:45,892 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:45,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-27 23:59:45,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:59:45,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-27 23:59:45,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:45,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-27 23:59:45,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371337002] [2019-11-27 23:59:45,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-27 23:59:45,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-27 23:59:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-27 23:59:45,952 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-11-27 23:59:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:46,023 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-11-27 23:59:46,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 23:59:46,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-27 23:59:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:46,025 INFO L225 Difference]: With dead ends: 39 [2019-11-27 23:59:46,025 INFO L226 Difference]: Without dead ends: 32 [2019-11-27 23:59:46,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-27 23:59:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-27 23:59:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-27 23:59:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-27 23:59:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-27 23:59:46,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2019-11-27 23:59:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:46,035 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-27 23:59:46,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-27 23:59:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-27 23:59:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-27 23:59:46,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:46,036 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:46,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:46,241 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash 474190189, now seen corresponding path program 4 times [2019-11-27 23:59:46,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:46,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335506145] [2019-11-27 23:59:46,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335506145] [2019-11-27 23:59:46,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806246035] [2019-11-27 23:59:46,330 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:46,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 23:59:46,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:59:46,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-27 23:59:46,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:46,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-27 23:59:46,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844267578] [2019-11-27 23:59:46,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 23:59:46,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 23:59:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-27 23:59:46,372 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-11-27 23:59:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:46,420 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-27 23:59:46,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 23:59:46,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-27 23:59:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:46,422 INFO L225 Difference]: With dead ends: 42 [2019-11-27 23:59:46,423 INFO L226 Difference]: Without dead ends: 35 [2019-11-27 23:59:46,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-27 23:59:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-27 23:59:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-27 23:59:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-27 23:59:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-27 23:59:46,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-27 23:59:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:46,429 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-27 23:59:46,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 23:59:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-27 23:59:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-27 23:59:46,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:46,430 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:46,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:46,631 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1368677114, now seen corresponding path program 5 times [2019-11-27 23:59:46,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:46,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661662134] [2019-11-27 23:59:46,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661662134] [2019-11-27 23:59:46,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934038965] [2019-11-27 23:59:46,731 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:46,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-27 23:59:46,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:59:46,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-27 23:59:46,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:46,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-27 23:59:46,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134176116] [2019-11-27 23:59:46,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-27 23:59:46,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-27 23:59:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-27 23:59:46,798 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2019-11-27 23:59:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:46,859 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-27 23:59:46,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-27 23:59:46,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-27 23:59:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:46,861 INFO L225 Difference]: With dead ends: 45 [2019-11-27 23:59:46,861 INFO L226 Difference]: Without dead ends: 38 [2019-11-27 23:59:46,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-27 23:59:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-27 23:59:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-27 23:59:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-27 23:59:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-27 23:59:46,867 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2019-11-27 23:59:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:46,868 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-27 23:59:46,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-27 23:59:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-27 23:59:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-27 23:59:46,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:46,869 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:47,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:47,075 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:47,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411891, now seen corresponding path program 6 times [2019-11-27 23:59:47,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:47,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047925441] [2019-11-27 23:59:47,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:59:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:59:47,142 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:59:47,142 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:59:47,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:59:47 BoogieIcfgContainer [2019-11-27 23:59:47,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:59:47,177 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:59:47,177 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:59:47,177 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:59:47,178 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:42" (3/4) ... [2019-11-27 23:59:47,180 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:59:47,286 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:59:47,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:59:47,292 INFO L168 Benchmark]: Toolchain (without parser) took 5742.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.3 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -172.6 MB). Peak memory consumption was 39.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:47,292 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:59:47,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.68 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:47,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:47,298 INFO L168 Benchmark]: Boogie Preprocessor took 16.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:59:47,298 INFO L168 Benchmark]: RCFGBuilder took 220.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:47,299 INFO L168 Benchmark]: TraceAbstraction took 5061.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -3.2 MB). Peak memory consumption was 57.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:47,300 INFO L168 Benchmark]: Witness Printer took 112.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:59:47,305 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 239.68 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 86.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 220.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5061.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -3.2 MB). Peak memory consumption was 57.6 MB. Max. memory is 11.5 GB. * Witness Printer took 112.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.9s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 71 SDslu, 141 SDs, 0 SdLazy, 487 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, 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, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 21242 SizeOfPredicates, 15 NumberOfNonLiveVariables, 336 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 135/756 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...