./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcompf.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/array-fpi/ifcompf.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 de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-11-28 15:33:56,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:33:56,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:33:56,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:33:56,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:33:56,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:33:56,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:33:56,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:33:56,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:33:56,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:33:56,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:33:56,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:33:56,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:33:56,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:33:56,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:33:56,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:33:56,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:33:56,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:33:56,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:33:56,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:33:56,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:33:56,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:33:56,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:33:56,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:33:56,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:33:56,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:33:56,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:33:56,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:33:56,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:33:56,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:33:56,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:33:56,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:33:56,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:33:56,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:33:56,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:33:56,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:33:56,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:33:56,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:33:56,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:33:56,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:33:56,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:33:56,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:33:56,959 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:33:56,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:33:56,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:33:56,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:33:56,962 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:33:56,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:33:56,962 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:33:56,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:33:56,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:33:56,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:33:56,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:33:56,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:33:56,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:33:56,964 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:33:56,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:33:56,965 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:33:56,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:33:56,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:33:56,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:33:56,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:33:56,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:33:56,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:33:56,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:33:56,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:33:56,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:33:56,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:33:56,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:33:56,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:33:56,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:33:56,969 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 -> de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 [2019-11-28 15:33:57,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:33:57,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:33:57,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:33:57,331 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:33:57,332 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:33:57,333 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2019-11-28 15:33:57,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83022f7da/a759bf1c71fb47b18f6a161afdc8de0e/FLAG0ee3f2a20 [2019-11-28 15:33:57,846 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:33:57,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2019-11-28 15:33:57,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83022f7da/a759bf1c71fb47b18f6a161afdc8de0e/FLAG0ee3f2a20 [2019-11-28 15:33:58,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83022f7da/a759bf1c71fb47b18f6a161afdc8de0e [2019-11-28 15:33:58,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:33:58,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:33:58,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:58,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:33:58,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:33:58,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6373eea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58, skipping insertion in model container [2019-11-28 15:33:58,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:33:58,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:33:58,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:58,503 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:33:58,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:58,543 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:33:58,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58 WrapperNode [2019-11-28 15:33:58,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:58,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:58,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:33:58,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:33:58,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:58,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:33:58,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:33:58,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:33:58,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (1/1) ... [2019-11-28 15:33:58,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:33:58,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:33:58,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:33:58,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:33:58,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (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 15:33:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:33:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 15:33:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:33:58,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:33:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:33:59,089 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:33:59,090 INFO L287 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-28 15:33:59,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:59 BoogieIcfgContainer [2019-11-28 15:33:59,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:33:59,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:33:59,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:33:59,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:33:59,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:33:58" (1/3) ... [2019-11-28 15:33:59,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebe3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:59, skipping insertion in model container [2019-11-28 15:33:59,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:58" (2/3) ... [2019-11-28 15:33:59,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebe3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:59, skipping insertion in model container [2019-11-28 15:33:59,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:59" (3/3) ... [2019-11-28 15:33:59,100 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2019-11-28 15:33:59,110 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:33:59,124 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:33:59,143 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:33:59,170 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:33:59,170 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:33:59,170 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:33:59,171 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:33:59,171 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:33:59,171 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:33:59,171 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:33:59,171 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:33:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-28 15:33:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 15:33:59,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:59,196 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:59,197 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash 638964938, now seen corresponding path program 1 times [2019-11-28 15:33:59,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:59,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391571769] [2019-11-28 15:33:59,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:59,352 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 15:33:59,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391571769] [2019-11-28 15:33:59,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:59,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:33:59,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398116385] [2019-11-28 15:33:59,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:33:59,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:59,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:33:59,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:59,377 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-28 15:33:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:59,396 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2019-11-28 15:33:59,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:33:59,398 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-28 15:33:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:59,408 INFO L225 Difference]: With dead ends: 44 [2019-11-28 15:33:59,408 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 15:33:59,411 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 [2019-11-28 15:33:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 15:33:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-28 15:33:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 15:33:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-11-28 15:33:59,447 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2019-11-28 15:33:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:59,447 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-11-28 15:33:59,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:33:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-11-28 15:33:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 15:33:59,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:59,449 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:59,449 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -953872449, now seen corresponding path program 1 times [2019-11-28 15:33:59,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:59,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452419334] [2019-11-28 15:33:59,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:59,469 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:59,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498344667] [2019-11-28 15:33:59,469 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 15:33:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:59,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:33:59,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:59,578 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 15:33:59,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452419334] [2019-11-28 15:33:59,579 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:59,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498344667] [2019-11-28 15:33:59,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:59,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:33:59,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697720503] [2019-11-28 15:33:59,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:33:59,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:59,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:33:59,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:33:59,585 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 3 states. [2019-11-28 15:33:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:59,663 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-11-28 15:33:59,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:33:59,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-28 15:33:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:59,665 INFO L225 Difference]: With dead ends: 39 [2019-11-28 15:33:59,665 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 15:33:59,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:33:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 15:33:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-28 15:33:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 15:33:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-28 15:33:59,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2019-11-28 15:33:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:59,673 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-28 15:33:59,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:33:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-28 15:33:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 15:33:59,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:59,675 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:59,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:59,887 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash 361112916, now seen corresponding path program 1 times [2019-11-28 15:33:59,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:59,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379595003] [2019-11-28 15:33:59,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:59,917 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:59,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112862968] [2019-11-28 15:33:59,918 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 15:33:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:59,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:33:59,980 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:34:00,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379595003] [2019-11-28 15:34:00,020 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:00,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112862968] [2019-11-28 15:34:00,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:00,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:34:00,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594793171] [2019-11-28 15:34:00,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:34:00,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:34:00,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:34:00,028 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 4 states. [2019-11-28 15:34:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:00,131 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-11-28 15:34:00,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:34:00,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-28 15:34:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:00,133 INFO L225 Difference]: With dead ends: 47 [2019-11-28 15:34:00,133 INFO L226 Difference]: Without dead ends: 36 [2019-11-28 15:34:00,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:34:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-28 15:34:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-11-28 15:34:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 15:34:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-28 15:34:00,140 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2019-11-28 15:34:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:00,141 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-28 15:34:00,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:34:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-28 15:34:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 15:34:00,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:00,142 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:00,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:00,343 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1034367045, now seen corresponding path program 1 times [2019-11-28 15:34:00,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:00,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573399367] [2019-11-28 15:34:00,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:00,368 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:00,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672011307] [2019-11-28 15:34:00,369 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 [2019-11-28 15:34:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:00,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 15:34:00,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:00,466 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 15:34:00,467 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:00,471 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:00,471 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:00,472 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-28 15:34:00,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:34:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 15:34:00,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573399367] [2019-11-28 15:34:00,503 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:00,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672011307] [2019-11-28 15:34:00,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:00,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 15:34:00,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64242038] [2019-11-28 15:34:00,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:34:00,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:34:00,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:34:00,506 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2019-11-28 15:34:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:00,621 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-11-28 15:34:00,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 15:34:00,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-28 15:34:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:00,623 INFO L225 Difference]: With dead ends: 42 [2019-11-28 15:34:00,624 INFO L226 Difference]: Without dead ends: 40 [2019-11-28 15:34:00,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:34:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-28 15:34:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2019-11-28 15:34:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 15:34:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-28 15:34:00,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2019-11-28 15:34:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:00,633 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-28 15:34:00,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:34:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-28 15:34:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 15:34:00,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:00,635 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:00,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:00,839 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash 740640317, now seen corresponding path program 1 times [2019-11-28 15:34:00,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:00,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555881801] [2019-11-28 15:34:00,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:00,869 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:00,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386812620] [2019-11-28 15:34:00,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:34:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:00,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:34:00,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 15:34:00,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555881801] [2019-11-28 15:34:00,931 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:00,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386812620] [2019-11-28 15:34:00,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:00,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:34:00,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212863056] [2019-11-28 15:34:00,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:34:00,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:34:00,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:34:00,935 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 3 states. [2019-11-28 15:34:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:01,017 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2019-11-28 15:34:01,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:34:01,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-28 15:34:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:01,019 INFO L225 Difference]: With dead ends: 60 [2019-11-28 15:34:01,020 INFO L226 Difference]: Without dead ends: 34 [2019-11-28 15:34:01,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:34:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-28 15:34:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-11-28 15:34:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 15:34:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-11-28 15:34:01,033 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2019-11-28 15:34:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:01,034 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-11-28 15:34:01,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:34:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-11-28 15:34:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 15:34:01,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:01,037 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:01,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:01,238 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1318744497, now seen corresponding path program 1 times [2019-11-28 15:34:01,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:01,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552645412] [2019-11-28 15:34:01,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:01,255 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:01,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783485856] [2019-11-28 15:34:01,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-28 15:34:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:01,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:34:01,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 15:34:01,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552645412] [2019-11-28 15:34:01,353 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:01,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783485856] [2019-11-28 15:34:01,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:34:01,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-28 15:34:01,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258264859] [2019-11-28 15:34:01,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 15:34:01,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 15:34:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:34:01,356 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2019-11-28 15:34:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:01,566 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2019-11-28 15:34:01,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 15:34:01,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-28 15:34:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:01,568 INFO L225 Difference]: With dead ends: 85 [2019-11-28 15:34:01,568 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 15:34:01,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-28 15:34:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 15:34:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-28 15:34:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 15:34:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-28 15:34:01,575 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2019-11-28 15:34:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:01,576 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-28 15:34:01,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 15:34:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-28 15:34:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-28 15:34:01,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:01,578 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:01,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:01,781 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 180948411, now seen corresponding path program 1 times [2019-11-28 15:34:01,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:01,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824515661] [2019-11-28 15:34:01,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:01,808 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:01,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226040470] [2019-11-28 15:34:01,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-28 15:34:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:01,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-28 15:34:01,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:01,900 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-28 15:34:01,901 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:01,911 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:01,912 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:01,912 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:4 [2019-11-28 15:34:01,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 15:34:01,948 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:01,959 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:01,959 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:01,959 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-28 15:34:02,128 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2019-11-28 15:34:02,130 INFO L343 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2019-11-28 15:34:02,131 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 140 [2019-11-28 15:34:02,133 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:02,193 INFO L614 ElimStorePlain]: treesize reduction 106, result has 38.0 percent of original size [2019-11-28 15:34:02,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:34:02,196 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:02,196 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:12 [2019-11-28 15:34:02,234 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-28 15:34:02,235 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:02,245 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:02,246 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:02,246 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-28 15:34:02,305 INFO L343 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2019-11-28 15:34:02,305 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2019-11-28 15:34:02,306 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:02,315 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:02,316 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-28 15:34:02,317 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:34 [2019-11-28 15:34:02,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:34:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 15:34:02,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824515661] [2019-11-28 15:34:02,429 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:02,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226040470] [2019-11-28 15:34:02,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:34:02,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-28 15:34:02,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044658567] [2019-11-28 15:34:02,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 15:34:02,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:02,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 15:34:02,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-28 15:34:02,432 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 14 states. [2019-11-28 15:34:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:02,923 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-11-28 15:34:02,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 15:34:02,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-28 15:34:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:02,925 INFO L225 Difference]: With dead ends: 66 [2019-11-28 15:34:02,926 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 15:34:02,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2019-11-28 15:34:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 15:34:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2019-11-28 15:34:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 15:34:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-28 15:34:02,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2019-11-28 15:34:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:02,932 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-28 15:34:02,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 15:34:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-28 15:34:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-28 15:34:02,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:02,934 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:03,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:03,134 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1220259761, now seen corresponding path program 2 times [2019-11-28 15:34:03,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:03,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013009066] [2019-11-28 15:34:03,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:03,164 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:03,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785346360] [2019-11-28 15:34:03,164 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 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 [2019-11-28 15:34:03,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:34:03,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:34:03,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 15:34:03,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 15:34:03,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013009066] [2019-11-28 15:34:03,294 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:03,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785346360] [2019-11-28 15:34:03,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:34:03,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-28 15:34:03,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485147124] [2019-11-28 15:34:03,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 15:34:03,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 15:34:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-28 15:34:03,304 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-28 15:34:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:03,517 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2019-11-28 15:34:03,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:34:03,517 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-28 15:34:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:03,523 INFO L225 Difference]: With dead ends: 114 [2019-11-28 15:34:03,524 INFO L226 Difference]: Without dead ends: 62 [2019-11-28 15:34:03,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:34:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-28 15:34:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2019-11-28 15:34:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-28 15:34:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-28 15:34:03,540 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2019-11-28 15:34:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:03,541 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-28 15:34:03,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 15:34:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-28 15:34:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-28 15:34:03,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:03,545 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:03,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:03,755 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:03,755 INFO L82 PathProgramCache]: Analyzing trace with hash -279478169, now seen corresponding path program 3 times [2019-11-28 15:34:03,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:03,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497717584] [2019-11-28 15:34:03,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:03,778 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:03,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714998099] [2019-11-28 15:34:03,779 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:03,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 15:34:03,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-28 15:34:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:34:03,935 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:34:03,936 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:34:04,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:04,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:34:04 BoogieIcfgContainer [2019-11-28 15:34:04,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:34:04,213 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:34:04,213 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:34:04,213 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:34:04,214 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:59" (3/4) ... [2019-11-28 15:34:04,216 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:34:04,321 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:34:04,321 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:34:04,323 INFO L168 Benchmark]: Toolchain (without parser) took 6066.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.1 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -123.4 MB). Peak memory consumption was 72.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:04,323 INFO L168 Benchmark]: CDTParser took 0.85 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 15:34:04,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.11 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:04,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:04,324 INFO L168 Benchmark]: Boogie Preprocessor took 28.84 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. [2019-11-28 15:34:04,325 INFO L168 Benchmark]: RCFGBuilder took 406.13 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:04,325 INFO L168 Benchmark]: TraceAbstraction took 5120.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.8 MB). Peak memory consumption was 73.4 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:04,326 INFO L168 Benchmark]: Witness Printer took 108.41 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: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:04,328 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 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 285.11 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 110.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.84 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 406.13 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5120.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.8 MB). Peak memory consumption was 73.4 MB. Max. memory is 11.5 GB. * Witness Printer took 108.41 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: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L25] long long *c = malloc(sizeof(long long)*N); [L27] i=0 VAL [N=3] [L27] COND TRUE i