./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c 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/nla-digbench/ps3.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0eae65bd4a214f811a2a4c3e828509d9c15c014 ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:11:53,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:11:53,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:11:53,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:11:53,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:11:53,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:11:53,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:11:53,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:11:53,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:11:53,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:11:53,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:11:53,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:11:53,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:11:53,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:11:53,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:11:53,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:11:53,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:11:53,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:11:53,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:11:53,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:11:53,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:11:53,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:11:53,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:11:53,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:11:53,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:11:53,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:11:53,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:11:53,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:11:53,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:11:53,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:11:53,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:11:53,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:11:53,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:11:53,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:11:53,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:11:53,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:11:53,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:11:53,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:11:53,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:11:53,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:11:53,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:11:53,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:11:53,125 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:11:53,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:11:53,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:11:53,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:11:53,128 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:11:53,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:11:53,129 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:11:53,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:11:53,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:11:53,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:11:53,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:11:53,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:11:53,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:11:53,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:11:53,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:11:53,132 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:11:53,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:11:53,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:11:53,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:11:53,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:11:53,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:11:53,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:11:53,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:11:53,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:11:53,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:11:53,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:11:53,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:11:53,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:11:53,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:11:53,136 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 -> a0eae65bd4a214f811a2a4c3e828509d9c15c014 [2019-11-28 17:11:53,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:11:53,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:11:53,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:11:53,477 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:11:53,478 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:11:53,479 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps3.c [2019-11-28 17:11:53,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d6a8c80/404a30f1360e483a900d9fe311f01aca/FLAGc5d64a3cc [2019-11-28 17:11:54,024 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:11:54,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps3.c [2019-11-28 17:11:54,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d6a8c80/404a30f1360e483a900d9fe311f01aca/FLAGc5d64a3cc [2019-11-28 17:11:54,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d6a8c80/404a30f1360e483a900d9fe311f01aca [2019-11-28 17:11:54,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:11:54,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:11:54,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:11:54,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:11:54,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:11:54,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2853d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54, skipping insertion in model container [2019-11-28 17:11:54,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:11:54,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:11:54,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:11:54,647 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:11:54,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:11:54,688 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:11:54,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54 WrapperNode [2019-11-28 17:11:54,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:11:54,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:11:54,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:11:54,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:11:54,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:11:54,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:11:54,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:11:54,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:11:54,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (1/1) ... [2019-11-28 17:11:54,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:11:54,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:11:54,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:11:54,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:11:54,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (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 [2019-11-28 17:11:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:11:54,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:11:55,054 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:11:55,054 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 17:11:55,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:55 BoogieIcfgContainer [2019-11-28 17:11:55,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:11:55,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:11:55,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:11:55,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:11:55,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:11:54" (1/3) ... [2019-11-28 17:11:55,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8d94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:11:55, skipping insertion in model container [2019-11-28 17:11:55,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:11:54" (2/3) ... [2019-11-28 17:11:55,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8d94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:11:55, skipping insertion in model container [2019-11-28 17:11:55,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:55" (3/3) ... [2019-11-28 17:11:55,066 INFO L109 eAbstractionObserver]: Analyzing ICFG ps3.c [2019-11-28 17:11:55,077 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:11:55,086 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-28 17:11:55,105 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-28 17:11:55,156 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:11:55,157 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:11:55,157 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:11:55,158 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:11:55,158 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:11:55,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:11:55,159 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:11:55,159 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:11:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-28 17:11:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-28 17:11:55,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:11:55,191 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-28 17:11:55,192 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:11:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:11:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-28 17:11:55,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:11:55,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995516947] [2019-11-28 17:11:55,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:11:55,281 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 17:11:55,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854013466] [2019-11-28 17:11:55,282 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 [2019-11-28 17:11:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:11:55,326 WARN L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:11:55,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:11:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:11:55,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995516947] [2019-11-28 17:11:55,395 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 17:11:55,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854013466] [2019-11-28 17:11:55,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:11:55,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:11:55,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822770516] [2019-11-28 17:11:55,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:11:55,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:11:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:11:55,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:11:55,421 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2019-11-28 17:11:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:11:55,616 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-11-28 17:11:55,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:11:55,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-28 17:11:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:11:55,629 INFO L225 Difference]: With dead ends: 37 [2019-11-28 17:11:55,629 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:11:55,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:11:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:11:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-28 17:11:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 17:11:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-28 17:11:55,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2019-11-28 17:11:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:11:55,664 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-28 17:11:55,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:11:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-28 17:11:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:11:55,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:11:55,665 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-28 17:11:55,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:11:55,869 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:11:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:11:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1360983589, now seen corresponding path program 1 times [2019-11-28 17:11:55,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:11:55,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801726261] [2019-11-28 17:11:55,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:11:55,877 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 17:11:55,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466094300] [2019-11-28 17:11:55,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:11:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:11:55,913 WARN L262 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 17:11:55,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:11:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:11:55,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801726261] [2019-11-28 17:11:55,995 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 17:11:55,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466094300] [2019-11-28 17:11:55,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:11:55,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-28 17:11:55,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732119898] [2019-11-28 17:11:55,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:11:55,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:11:55,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:11:55,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:11:55,999 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-11-28 17:11:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:11:56,066 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-28 17:11:56,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:11:56,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-28 17:11:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:11:56,068 INFO L225 Difference]: With dead ends: 23 [2019-11-28 17:11:56,068 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:11:56,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:11:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:11:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-28 17:11:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 17:11:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-28 17:11:56,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2019-11-28 17:11:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:11:56,076 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-28 17:11:56,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:11:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-28 17:11:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:11:56,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:11:56,077 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-11-28 17:11:56,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:11:56,281 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:11:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:11:56,282 INFO L82 PathProgramCache]: Analyzing trace with hash -565900116, now seen corresponding path program 2 times [2019-11-28 17:11:56,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:11:56,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846170] [2019-11-28 17:11:56,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:11:56,289 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 17:11:56,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071754458] [2019-11-28 17:11:56,290 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 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 [2019-11-28 17:11:56,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:11:56,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:11:56,330 WARN L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 17:11:56,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:11:56,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:11:58,477 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_ULTIMATE.start_main_~y~0 (- 1)))) (let ((.cse0 (* (+ (* c_ULTIMATE.start_main_~y~0 3) (- 3)) .cse2)) (.cse1 (* (* (+ (* c_ULTIMATE.start_main_~y~0 2) (- 2)) .cse2) .cse2))) (and (<= c_ULTIMATE.start_main_~x~0 (+ (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (div (+ .cse0 .cse1 c_ULTIMATE.start_main_~y~0 (- 1)) 6))) (= 0 (mod (+ .cse0 .cse1 c_ULTIMATE.start_main_~y~0 5) 6)) (= 1 c_ULTIMATE.start_main_~y~0)))) is different from true [2019-11-28 17:12:00,493 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_ULTIMATE.start_main_~y~0 2)) (.cse3 (* c_ULTIMATE.start_main_~y~0 3)) (.cse5 (+ c_ULTIMATE.start_main_~y~0 (- 1)))) (let ((.cse0 (* (+ .cse3 (- 3)) .cse5)) (.cse1 (* (* (+ .cse4 (- 2)) .cse5) .cse5))) (and (<= c_ULTIMATE.start_main_~x~0 (+ (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (div (+ .cse0 .cse1 c_ULTIMATE.start_main_~y~0 (- 1)) 6))) (= 0 (mod (+ .cse0 .cse1 c_ULTIMATE.start_main_~y~0 5) 6)) (let ((.cse2 (= (+ (* .cse3 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0 (* (* .cse4 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0)) (* 6 c_ULTIMATE.start_main_~x~0)))) (or (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse2) (and (not .cse2) (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond)))) (= 1 c_ULTIMATE.start_main_~y~0)))) is different from true [2019-11-28 17:12:00,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:12:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-11-28 17:12:00,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846170] [2019-11-28 17:12:00,639 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 17:12:00,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071754458] [2019-11-28 17:12:00,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:12:00,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-28 17:12:00,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910686061] [2019-11-28 17:12:00,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:12:00,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:12:00,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:12:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=43, Unknown=2, NotChecked=26, Total=90 [2019-11-28 17:12:00,643 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2019-11-28 17:12:02,769 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_ULTIMATE.start_main_~y~0 2)) (.cse2 (* c_ULTIMATE.start_main_~y~0 3)) (.cse4 (+ c_ULTIMATE.start_main_~y~0 (- 1)))) (let ((.cse0 (* (+ .cse2 (- 3)) .cse4)) (.cse1 (* (* (+ .cse3 (- 2)) .cse4) .cse4))) (and (<= c_ULTIMATE.start_main_~x~0 (+ (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (div (+ .cse0 .cse1 c_ULTIMATE.start_main_~y~0 (- 1)) 6))) (= 0 (mod (+ .cse0 .cse1 c_ULTIMATE.start_main_~y~0 5) 6)) (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) (= c_ULTIMATE.start_main_~y~0 1) (= 1 c_ULTIMATE.start_main_~y~0) (= (* 6 c_ULTIMATE.start_main_~x~0) (+ (* .cse2 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0 (* (* .cse3 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~y~0)))))) is different from true [2019-11-28 17:12:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:12:02,932 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-28 17:12:02,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:12:02,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-11-28 17:12:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:12:02,934 INFO L225 Difference]: With dead ends: 26 [2019-11-28 17:12:02,934 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:12:02,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=31, Invalid=68, Unknown=3, NotChecked=54, Total=156 [2019-11-28 17:12:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:12:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-28 17:12:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 17:12:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-28 17:12:02,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2019-11-28 17:12:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:12:02,942 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-28 17:12:02,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:12:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-28 17:12:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:12:02,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:12:02,943 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2019-11-28 17:12:03,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:12:03,156 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:12:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:12:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash -978793413, now seen corresponding path program 3 times [2019-11-28 17:12:03,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:12:03,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410660373] [2019-11-28 17:12:03,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:12:03,165 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 17:12:03,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686669021] [2019-11-28 17:12:03,166 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:12:03,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 17:12:03,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:12:03,208 WARN L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 17:12:03,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:12:03,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:12:03,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:12:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 17:12:03,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410660373] [2019-11-28 17:12:03,526 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 17:12:03,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686669021] [2019-11-28 17:12:03,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:12:03,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-28 17:12:03,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342463746] [2019-11-28 17:12:03,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:12:03,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:12:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:12:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:12:03,529 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2019-11-28 17:12:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:12:03,647 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-28 17:12:03,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:12:03,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-28 17:12:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:12:03,648 INFO L225 Difference]: With dead ends: 19 [2019-11-28 17:12:03,648 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:12:03,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:12:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:12:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:12:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:12:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:12:03,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-11-28 17:12:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:12:03,651 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:12:03,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:12:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:12:03,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:12:03,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:12:03,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:12:03,924 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:12:03,925 INFO L249 CegarLoopResult]: At program point L31(lines 12 32) the Hoare annotation is: true [2019-11-28 17:12:03,925 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-11-28 17:12:03,925 INFO L246 CegarLoopResult]: For program point L5(lines 5 8) no Hoare annotation was computed. [2019-11-28 17:12:03,926 INFO L242 CegarLoopResult]: At program point L5-2(lines 23 24) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 6) (+ (* (* ULTIMATE.start_main_~y~0 3) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0 (* (* (* ULTIMATE.start_main_~y~0 2) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)))) [2019-11-28 17:12:03,926 INFO L246 CegarLoopResult]: For program point L5-3(lines 5 8) no Hoare annotation was computed. [2019-11-28 17:12:03,926 INFO L249 CegarLoopResult]: At program point L5-5(lines 4 10) the Hoare annotation is: true [2019-11-28 17:12:03,926 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:12:03,926 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:12:03,927 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-11-28 17:12:03,927 INFO L242 CegarLoopResult]: At program point L20-2(lines 20 29) the Hoare annotation is: (let ((.cse0 (= (* ULTIMATE.start_main_~x~0 6) (+ (* (* ULTIMATE.start_main_~y~0 3) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0 (* (* (* ULTIMATE.start_main_~y~0 2) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))))) (or (and (= ULTIMATE.start_main_~y~0 0) .cse0) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2019-11-28 17:12:03,927 INFO L246 CegarLoopResult]: For program point L20-3(lines 20 29) no Hoare annotation was computed. [2019-11-28 17:12:03,928 INFO L246 CegarLoopResult]: For program point L6(lines 6 7) no Hoare annotation was computed. [2019-11-28 17:12:03,928 INFO L246 CegarLoopResult]: For program point L6-1(lines 6 7) no Hoare annotation was computed. [2019-11-28 17:12:03,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:12:03 BoogieIcfgContainer [2019-11-28 17:12:03,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:12:03,949 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:12:03,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:12:03,950 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:12:03,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:11:55" (3/4) ... [2019-11-28 17:12:03,955 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:12:03,967 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:12:03,968 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:12:04,015 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:12:04,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:12:04,018 INFO L168 Benchmark]: Toolchain (without parser) took 9605.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 960.4 MB in the beginning and 963.3 MB in the end (delta: -2.9 MB). Peak memory consumption was 128.2 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,019 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:12:04,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.08 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,022 INFO L168 Benchmark]: Boogie Preprocessor took 20.38 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,022 INFO L168 Benchmark]: RCFGBuilder took 245.73 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: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,023 INFO L168 Benchmark]: TraceAbstraction took 8891.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.0 MB in the end (delta: 138.7 MB). Peak memory consumption was 138.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,024 INFO L168 Benchmark]: Witness Printer took 66.55 ms. Allocated memory is still 1.2 GB. Free memory was 970.0 MB in the beginning and 963.3 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:12:04,028 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.08 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 99.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.38 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 245.73 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: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8891.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.0 MB in the end (delta: 138.7 MB). Peak memory consumption was 138.7 MB. Max. memory is 11.5 GB. * Witness Printer took 66.55 ms. Allocated memory is still 1.2 GB. Free memory was 970.0 MB in the beginning and 963.3 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (y == 0 && x * 6 == y * 3 * y + y + y * 2 * y * y) || (1 == cond && x * 6 == y * 3 * y + y + y * 2 * y * y) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 == cond && x * 6 == y * 3 * y + y + y * 2 * y * y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 2 error locations. Result: SAFE, OverallTime: 8.7s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 40 SDslu, 54 SDs, 0 SdLazy, 85 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=3, 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 16 NumberOfFragments, 69 HoareAnnotationTreeSize, 4 FomulaSimplifications, 229 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 34 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 4176 SizeOfPredicates, 28 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 9/24 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 correct! Received shutdown request...