./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f6fb2bb1 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/reducercommutativity/rangesum05.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-f6fb2bb [2019-11-19 18:21:07,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 18:21:07,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 18:21:07,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 18:21:07,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 18:21:07,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 18:21:07,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 18:21:07,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 18:21:07,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 18:21:07,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 18:21:07,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 18:21:07,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 18:21:07,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 18:21:07,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 18:21:07,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 18:21:07,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 18:21:07,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 18:21:07,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 18:21:07,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 18:21:07,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 18:21:07,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 18:21:07,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 18:21:07,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 18:21:07,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 18:21:07,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 18:21:07,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 18:21:07,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 18:21:07,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 18:21:07,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 18:21:07,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 18:21:07,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 18:21:07,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 18:21:07,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 18:21:07,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 18:21:07,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 18:21:07,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 18:21:07,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 18:21:07,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 18:21:07,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 18:21:07,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 18:21:07,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 18:21:07,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 18:21:07,989 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 18:21:07,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 18:21:07,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 18:21:07,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 18:21:07,991 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 18:21:07,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 18:21:07,992 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 18:21:07,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 18:21:07,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 18:21:07,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 18:21:07,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 18:21:07,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 18:21:07,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 18:21:07,994 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 18:21:07,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 18:21:07,994 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 18:21:07,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 18:21:07,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 18:21:07,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 18:21:07,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 18:21:07,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 18:21:07,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 18:21:07,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 18:21:07,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 18:21:07,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 18:21:07,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 18:21:07,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 18:21:07,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 18:21:07,998 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 -> 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 [2019-11-19 18:21:08,321 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 18:21:08,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 18:21:08,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 18:21:08,344 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 18:21:08,344 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 18:21:08,347 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-19 18:21:08,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88531bcb/72f44727ef84460e95bd116361656caf/FLAGc92c3dd73 [2019-11-19 18:21:08,984 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 18:21:08,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-19 18:21:08,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88531bcb/72f44727ef84460e95bd116361656caf/FLAGc92c3dd73 [2019-11-19 18:21:09,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88531bcb/72f44727ef84460e95bd116361656caf [2019-11-19 18:21:09,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 18:21:09,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 18:21:09,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 18:21:09,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 18:21:09,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 18:21:09,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7d1214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09, skipping insertion in model container [2019-11-19 18:21:09,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,423 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 18:21:09,467 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 18:21:09,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:21:09,770 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 18:21:09,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:21:09,888 INFO L192 MainTranslator]: Completed translation [2019-11-19 18:21:09,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09 WrapperNode [2019-11-19 18:21:09,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 18:21:09,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 18:21:09,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 18:21:09,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 18:21:09,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 18:21:09,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 18:21:09,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 18:21:09,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 18:21:09,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (1/1) ... [2019-11-19 18:21:09,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 18:21:09,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 18:21:09,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 18:21:09,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 18:21:09,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (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 [2019-11-19 18:21:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 18:21:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 18:21:10,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 18:21:10,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 18:21:10,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 18:21:10,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 18:21:10,401 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 18:21:10,402 INFO L285 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-19 18:21:10,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:21:10 BoogieIcfgContainer [2019-11-19 18:21:10,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 18:21:10,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 18:21:10,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 18:21:10,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 18:21:10,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:21:09" (1/3) ... [2019-11-19 18:21:10,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b4e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:21:10, skipping insertion in model container [2019-11-19 18:21:10,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:21:09" (2/3) ... [2019-11-19 18:21:10,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b4e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:21:10, skipping insertion in model container [2019-11-19 18:21:10,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:21:10" (3/3) ... [2019-11-19 18:21:10,416 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2019-11-19 18:21:10,427 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 18:21:10,434 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 18:21:10,461 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 18:21:10,507 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 18:21:10,508 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 18:21:10,508 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 18:21:10,508 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 18:21:10,509 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 18:21:10,509 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 18:21:10,509 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 18:21:10,509 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 18:21:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-19 18:21:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 18:21:10,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:10,543 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:10,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-19 18:21:10,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:10,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278234523] [2019-11-19 18:21:10,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:21:10,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278234523] [2019-11-19 18:21:10,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:10,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 18:21:10,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834938244] [2019-11-19 18:21:10,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 18:21:10,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 18:21:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 18:21:10,774 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-19 18:21:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:10,796 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-19 18:21:10,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 18:21:10,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-19 18:21:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:10,807 INFO L225 Difference]: With dead ends: 56 [2019-11-19 18:21:10,808 INFO L226 Difference]: Without dead ends: 26 [2019-11-19 18:21:10,812 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 [2019-11-19 18:21:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-19 18:21:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-19 18:21:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 18:21:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-19 18:21:10,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-19 18:21:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:10,850 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-19 18:21:10,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 18:21:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-19 18:21:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 18:21:10,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:10,852 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:10,852 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-19 18:21:10,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:10,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87344922] [2019-11-19 18:21:10,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:10,868 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:10,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599445095] [2019-11-19 18:21:10,869 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 [2019-11-19 18:21:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:10,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 18:21:10,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:21:10,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87344922] [2019-11-19 18:21:10,991 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:10,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599445095] [2019-11-19 18:21:10,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:10,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 18:21:10,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862523779] [2019-11-19 18:21:10,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 18:21:10,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 18:21:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:10,995 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-19 18:21:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:11,016 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-19 18:21:11,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 18:21:11,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-19 18:21:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:11,018 INFO L225 Difference]: With dead ends: 50 [2019-11-19 18:21:11,019 INFO L226 Difference]: Without dead ends: 28 [2019-11-19 18:21:11,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-19 18:21:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-19 18:21:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-19 18:21:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-19 18:21:11,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-19 18:21:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:11,028 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-19 18:21:11,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 18:21:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-19 18:21:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 18:21:11,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:11,030 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:11,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:11,236 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-19 18:21:11,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:11,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828344921] [2019-11-19 18:21:11,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:11,284 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:11,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167335099] [2019-11-19 18:21:11,287 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 [2019-11-19 18:21:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:11,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 18:21:11,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 18:21:11,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828344921] [2019-11-19 18:21:11,474 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:11,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167335099] [2019-11-19 18:21:11,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:11,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 18:21:11,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099782992] [2019-11-19 18:21:11,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 18:21:11,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 18:21:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:11,480 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-19 18:21:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:11,557 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-19 18:21:11,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 18:21:11,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-19 18:21:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:11,559 INFO L225 Difference]: With dead ends: 57 [2019-11-19 18:21:11,560 INFO L226 Difference]: Without dead ends: 36 [2019-11-19 18:21:11,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-19 18:21:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-19 18:21:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-19 18:21:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-19 18:21:11,568 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-19 18:21:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:11,568 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-19 18:21:11,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 18:21:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-19 18:21:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-19 18:21:11,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:11,570 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:11,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:11,774 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-19 18:21:11,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:11,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508080995] [2019-11-19 18:21:11,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:11,794 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:11,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353406815] [2019-11-19 18:21:11,795 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 [2019-11-19 18:21:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:11,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 18:21:11,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-19 18:21:11,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508080995] [2019-11-19 18:21:11,887 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:11,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353406815] [2019-11-19 18:21:11,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:11,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 18:21:11,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96607318] [2019-11-19 18:21:11,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 18:21:11,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 18:21:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:11,893 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-19 18:21:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:12,019 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-19 18:21:12,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 18:21:12,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-19 18:21:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:12,021 INFO L225 Difference]: With dead ends: 75 [2019-11-19 18:21:12,021 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 18:21:12,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 18:21:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-19 18:21:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-19 18:21:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-19 18:21:12,034 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-19 18:21:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:12,035 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-19 18:21:12,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 18:21:12,035 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-19 18:21:12,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-19 18:21:12,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:12,037 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:12,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:12,241 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-19 18:21:12,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:12,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021297358] [2019-11-19 18:21:12,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 18:21:12,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021297358] [2019-11-19 18:21:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:12,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 18:21:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915501518] [2019-11-19 18:21:12,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 18:21:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 18:21:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:12,341 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-19 18:21:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:12,444 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-19 18:21:12,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 18:21:12,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-19 18:21:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:12,446 INFO L225 Difference]: With dead ends: 85 [2019-11-19 18:21:12,446 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 18:21:12,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 18:21:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-19 18:21:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-19 18:21:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-19 18:21:12,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-19 18:21:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:12,456 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-19 18:21:12,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 18:21:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-19 18:21:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-19 18:21:12,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:12,458 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-11-19 18:21:12,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-19 18:21:12,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:12,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635313772] [2019-11-19 18:21:12,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:12,475 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:12,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792433825] [2019-11-19 18:21:12,476 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 [2019-11-19 18:21:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:12,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 18:21:12,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-19 18:21:12,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635313772] [2019-11-19 18:21:12,575 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:12,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792433825] [2019-11-19 18:21:12,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:12,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 18:21:12,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137745957] [2019-11-19 18:21:12,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 18:21:12,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 18:21:12,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:12,586 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-19 18:21:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:12,615 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-19 18:21:12,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 18:21:12,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-19 18:21:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:12,617 INFO L225 Difference]: With dead ends: 54 [2019-11-19 18:21:12,617 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 18:21:12,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 18:21:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 18:21:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-19 18:21:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-19 18:21:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-19 18:21:12,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-19 18:21:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:12,626 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-19 18:21:12,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 18:21:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-19 18:21:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 18:21:12,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:12,629 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:12,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:12,833 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-19 18:21:12,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:12,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775098177] [2019-11-19 18:21:12,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:12,860 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:12,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978695274] [2019-11-19 18:21:12,861 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 [2019-11-19 18:21:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:12,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 18:21:12,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-19 18:21:12,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775098177] [2019-11-19 18:21:12,968 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:12,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978695274] [2019-11-19 18:21:12,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:12,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 18:21:12,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324666208] [2019-11-19 18:21:12,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 18:21:12,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 18:21:12,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:12,971 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-19 18:21:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:12,992 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-19 18:21:12,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 18:21:12,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-19 18:21:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:12,993 INFO L225 Difference]: With dead ends: 78 [2019-11-19 18:21:12,994 INFO L226 Difference]: Without dead ends: 43 [2019-11-19 18:21:12,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-19 18:21:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-19 18:21:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 18:21:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-19 18:21:13,003 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-19 18:21:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:13,003 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-19 18:21:13,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 18:21:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-19 18:21:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-19 18:21:13,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:13,008 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:13,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:13,214 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-19 18:21:13,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:13,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316402341] [2019-11-19 18:21:13,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:13,242 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:13,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196066227] [2019-11-19 18:21:13,243 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 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 [2019-11-19 18:21:13,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 18:21:13,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:13,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 18:21:13,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 18:21:13,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316402341] [2019-11-19 18:21:13,333 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:13,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196066227] [2019-11-19 18:21:13,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:13,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 18:21:13,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95948563] [2019-11-19 18:21:13,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 18:21:13,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 18:21:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:13,336 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-19 18:21:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:13,399 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-19 18:21:13,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 18:21:13,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-19 18:21:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:13,401 INFO L225 Difference]: With dead ends: 86 [2019-11-19 18:21:13,401 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 18:21:13,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 18:21:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-19 18:21:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-19 18:21:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-19 18:21:13,421 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-19 18:21:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:13,421 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-19 18:21:13,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 18:21:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-19 18:21:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 18:21:13,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:13,426 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:13,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:13,627 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-19 18:21:13,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:13,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549666430] [2019-11-19 18:21:13,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:13,642 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:13,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428042200] [2019-11-19 18:21:13,643 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 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 [2019-11-19 18:21:13,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-19 18:21:13,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:13,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 18:21:13,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 18:21:13,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549666430] [2019-11-19 18:21:13,783 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:13,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428042200] [2019-11-19 18:21:13,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:13,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 18:21:13,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147671439] [2019-11-19 18:21:13,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 18:21:13,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 18:21:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:13,790 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-19 18:21:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:13,818 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-19 18:21:13,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 18:21:13,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-19 18:21:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:13,822 INFO L225 Difference]: With dead ends: 70 [2019-11-19 18:21:13,822 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 18:21:13,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 18:21:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-19 18:21:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-19 18:21:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-19 18:21:13,836 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-19 18:21:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:13,837 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-19 18:21:13,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 18:21:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-19 18:21:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-19 18:21:13,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:13,841 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-19 18:21:14,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:14,052 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-19 18:21:14,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:14,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933648453] [2019-11-19 18:21:14,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:14,072 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:14,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184492287] [2019-11-19 18:21:14,075 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-19 18:21:14,134 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 18:21:14,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:14,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:21:14,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-19 18:21:14,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933648453] [2019-11-19 18:21:14,188 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:14,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184492287] [2019-11-19 18:21:14,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:14,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 18:21:14,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649729944] [2019-11-19 18:21:14,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 18:21:14,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:14,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 18:21:14,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:21:14,193 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-19 18:21:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:14,270 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-11-19 18:21:14,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 18:21:14,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-19 18:21:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:14,272 INFO L225 Difference]: With dead ends: 102 [2019-11-19 18:21:14,272 INFO L226 Difference]: Without dead ends: 62 [2019-11-19 18:21:14,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:21:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-19 18:21:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-19 18:21:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 18:21:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-19 18:21:14,286 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-11-19 18:21:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:14,287 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-19 18:21:14,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 18:21:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-19 18:21:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-19 18:21:14,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:14,293 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:14,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:14,498 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-11-19 18:21:14,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:14,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890389466] [2019-11-19 18:21:14,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:14,512 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:14,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037443098] [2019-11-19 18:21:14,513 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:14,574 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-19 18:21:14,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:14,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 18:21:14,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-19 18:21:14,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890389466] [2019-11-19 18:21:14,601 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:14,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037443098] [2019-11-19 18:21:14,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:21:14,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 18:21:14,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324305250] [2019-11-19 18:21:14,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 18:21:14,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 18:21:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:14,604 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-11-19 18:21:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:14,641 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2019-11-19 18:21:14,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 18:21:14,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-19 18:21:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:14,643 INFO L225 Difference]: With dead ends: 111 [2019-11-19 18:21:14,643 INFO L226 Difference]: Without dead ends: 71 [2019-11-19 18:21:14,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:21:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-19 18:21:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-19 18:21:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 18:21:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-19 18:21:14,650 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 61 [2019-11-19 18:21:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:14,651 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-19 18:21:14,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 18:21:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-19 18:21:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-19 18:21:14,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:14,652 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:14,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:14,856 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2021142629, now seen corresponding path program 1 times [2019-11-19 18:21:14,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:14,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381076978] [2019-11-19 18:21:14,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:14,872 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:14,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680936676] [2019-11-19 18:21:14,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:21:14,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:21:14,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-19 18:21:14,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381076978] [2019-11-19 18:21:14,985 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:14,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680936676] [2019-11-19 18:21:14,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:14,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 18:21:14,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735476857] [2019-11-19 18:21:14,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 18:21:14,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 18:21:14,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:21:14,988 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2019-11-19 18:21:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:15,008 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-11-19 18:21:15,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 18:21:15,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-19 18:21:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:15,009 INFO L225 Difference]: With dead ends: 120 [2019-11-19 18:21:15,009 INFO L226 Difference]: Without dead ends: 65 [2019-11-19 18:21:15,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:21:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-19 18:21:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-19 18:21:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-19 18:21:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-19 18:21:15,016 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2019-11-19 18:21:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:15,017 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-19 18:21:15,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 18:21:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-19 18:21:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-19 18:21:15,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:15,018 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:15,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:15,224 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash 265673379, now seen corresponding path program 2 times [2019-11-19 18:21:15,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:15,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068854281] [2019-11-19 18:21:15,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:15,239 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:15,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616278220] [2019-11-19 18:21:15,240 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:15,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 18:21:15,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:15,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 18:21:15,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-19 18:21:15,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068854281] [2019-11-19 18:21:15,346 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:15,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616278220] [2019-11-19 18:21:15,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:15,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-19 18:21:15,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680732259] [2019-11-19 18:21:15,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 18:21:15,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 18:21:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 18:21:15,348 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2019-11-19 18:21:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:15,374 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-19 18:21:15,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 18:21:15,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-11-19 18:21:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:15,376 INFO L225 Difference]: With dead ends: 122 [2019-11-19 18:21:15,376 INFO L226 Difference]: Without dead ends: 67 [2019-11-19 18:21:15,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 18:21:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-19 18:21:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-19 18:21:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-19 18:21:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-19 18:21:15,383 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-19 18:21:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:15,383 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-19 18:21:15,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 18:21:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-19 18:21:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-19 18:21:15,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:15,384 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:15,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:15,593 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1181871457, now seen corresponding path program 3 times [2019-11-19 18:21:15,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:15,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674462939] [2019-11-19 18:21:15,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:15,609 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:15,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021169273] [2019-11-19 18:21:15,610 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:15,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 18:21:15,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:15,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:21:15,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-19 18:21:15,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674462939] [2019-11-19 18:21:15,701 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:15,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021169273] [2019-11-19 18:21:15,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:15,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 18:21:15,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059654214] [2019-11-19 18:21:15,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 18:21:15,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 18:21:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:21:15,704 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2019-11-19 18:21:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:15,724 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-11-19 18:21:15,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 18:21:15,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-11-19 18:21:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:15,728 INFO L225 Difference]: With dead ends: 88 [2019-11-19 18:21:15,728 INFO L226 Difference]: Without dead ends: 69 [2019-11-19 18:21:15,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:21:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-19 18:21:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-19 18:21:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-19 18:21:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-19 18:21:15,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-19 18:21:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:15,738 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-19 18:21:15,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 18:21:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-19 18:21:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-19 18:21:15,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:15,739 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:15,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:15,941 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 4 times [2019-11-19 18:21:15,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:15,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972665384] [2019-11-19 18:21:15,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:15,954 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:15,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767274663] [2019-11-19 18:21:15,955 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:16,003 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 18:21:16,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:16,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 18:21:16,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-19 18:21:16,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972665384] [2019-11-19 18:21:16,042 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:16,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767274663] [2019-11-19 18:21:16,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:16,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 18:21:16,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159233584] [2019-11-19 18:21:16,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:21:16,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:16,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:21:16,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:21:16,046 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 7 states. [2019-11-19 18:21:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:16,173 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-19 18:21:16,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 18:21:16,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-19 18:21:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:16,174 INFO L225 Difference]: With dead ends: 120 [2019-11-19 18:21:16,174 INFO L226 Difference]: Without dead ends: 77 [2019-11-19 18:21:16,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:21:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-19 18:21:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-19 18:21:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-19 18:21:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-19 18:21:16,183 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-19 18:21:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:16,183 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-19 18:21:16,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:21:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-19 18:21:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-19 18:21:16,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:16,185 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:16,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:16,386 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 5 times [2019-11-19 18:21:16,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:16,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621330495] [2019-11-19 18:21:16,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:16,399 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:16,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717324462] [2019-11-19 18:21:16,400 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:16,493 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 18:21:16,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:16,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 18:21:16,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-19 18:21:16,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621330495] [2019-11-19 18:21:16,538 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:16,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717324462] [2019-11-19 18:21:16,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:16,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 18:21:16,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316665376] [2019-11-19 18:21:16,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:21:16,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:16,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:21:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:21:16,540 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 7 states. [2019-11-19 18:21:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:16,570 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-11-19 18:21:16,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 18:21:16,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-11-19 18:21:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:16,571 INFO L225 Difference]: With dead ends: 145 [2019-11-19 18:21:16,571 INFO L226 Difference]: Without dead ends: 79 [2019-11-19 18:21:16,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:21:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-19 18:21:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-19 18:21:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-19 18:21:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-19 18:21:16,578 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2019-11-19 18:21:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:16,578 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-19 18:21:16,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:21:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-19 18:21:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-19 18:21:16,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:16,579 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:16,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:16,784 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:16,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 6 times [2019-11-19 18:21:16,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:16,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507803923] [2019-11-19 18:21:16,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:16,799 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:16,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684577219] [2019-11-19 18:21:16,799 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:17,407 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-19 18:21:17,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:21:17,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 18:21:17,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:21:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-19 18:21:17,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507803923] [2019-11-19 18:21:17,434 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:21:17,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684577219] [2019-11-19 18:21:17,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:21:17,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-19 18:21:17,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074391130] [2019-11-19 18:21:17,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 18:21:17,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:21:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 18:21:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 18:21:17,436 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2019-11-19 18:21:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:21:17,470 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2019-11-19 18:21:17,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 18:21:17,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-11-19 18:21:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:21:17,472 INFO L225 Difference]: With dead ends: 103 [2019-11-19 18:21:17,472 INFO L226 Difference]: Without dead ends: 81 [2019-11-19 18:21:17,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 18:21:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-19 18:21:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-19 18:21:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 18:21:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-11-19 18:21:17,478 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2019-11-19 18:21:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:21:17,478 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-11-19 18:21:17,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 18:21:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-11-19 18:21:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-19 18:21:17,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:21:17,480 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:21:17,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:17,684 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:21:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:21:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 7 times [2019-11-19 18:21:17,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:21:17,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466739704] [2019-11-19 18:21:17,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:21:17,699 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:21:17,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974548477] [2019-11-19 18:21:17,700 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 18:21:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 18:21:18,264 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 18:21:18,265 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 18:21:18,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:21:18,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:21:18 BoogieIcfgContainer [2019-11-19 18:21:18,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 18:21:18,557 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 18:21:18,558 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 18:21:18,559 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 18:21:18,559 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:21:10" (3/4) ... [2019-11-19 18:21:18,561 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 18:21:18,669 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 18:21:18,669 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 18:21:18,671 INFO L168 Benchmark]: Toolchain (without parser) took 9289.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.4 MB). Free memory was 955.0 MB in the beginning and 954.7 MB in the end (delta: 270.5 kB). Peak memory consumption was 202.6 MB. Max. memory is 11.5 GB. [2019-11-19 18:21:18,671 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 18:21:18,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 502.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -176.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-19 18:21:18,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.47 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-19 18:21:18,673 INFO L168 Benchmark]: Boogie Preprocessor took 32.00 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. [2019-11-19 18:21:18,673 INFO L168 Benchmark]: RCFGBuilder took 431.95 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-11-19 18:21:18,674 INFO L168 Benchmark]: TraceAbstraction took 8151.75 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 961.8 MB in the end (delta: 139.4 MB). Peak memory consumption was 206.5 MB. Max. memory is 11.5 GB. [2019-11-19 18:21:18,674 INFO L168 Benchmark]: Witness Printer took 111.65 ms. Allocated memory is still 1.2 GB. Free memory was 961.8 MB in the beginning and 954.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-19 18:21:18,676 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 502.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -176.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 49.47 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.00 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 431.95 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8151.75 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 961.8 MB in the end (delta: 139.4 MB). Peak memory consumption was 206.5 MB. Max. memory is 11.5 GB. * Witness Printer took 111.65 ms. Allocated memory is still 1.2 GB. Free memory was 961.8 MB in the beginning and 954.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; [L5] int i; [L6] i = 0 [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE !(i < 5) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<5 -1) [L46] x[5 -1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Result: UNSAFE, OverallTime: 8.0s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 187 SDslu, 565 SDs, 0 SdLazy, 304 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 46 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 879 NumberOfCodeBlocks, 816 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 52874 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2293 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 745/820 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...