./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 65a59966 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0f1c45558152fd199606f2551fe8da5ad92b45c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 e0f1c45558152fd199606f2551fe8da5ad92b45c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-65a5996 [2019-11-20 19:16:59,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 19:16:59,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 19:16:59,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 19:16:59,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 19:16:59,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 19:16:59,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 19:16:59,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 19:16:59,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 19:16:59,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 19:16:59,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 19:16:59,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 19:16:59,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 19:16:59,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 19:16:59,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 19:16:59,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 19:16:59,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 19:16:59,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 19:16:59,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 19:16:59,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 19:16:59,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 19:16:59,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 19:16:59,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 19:16:59,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 19:16:59,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 19:16:59,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 19:16:59,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 19:16:59,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 19:16:59,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 19:16:59,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 19:16:59,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 19:16:59,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 19:16:59,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 19:16:59,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 19:16:59,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 19:16:59,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 19:16:59,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 19:16:59,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 19:16:59,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 19:16:59,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 19:16:59,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 19:16:59,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 19:16:59,999 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 19:17:00,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 19:17:00,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 19:17:00,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 19:17:00,002 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 19:17:00,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 19:17:00,003 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 19:17:00,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 19:17:00,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 19:17:00,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 19:17:00,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 19:17:00,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 19:17:00,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 19:17:00,006 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 19:17:00,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 19:17:00,006 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 19:17:00,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 19:17:00,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 19:17:00,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 19:17:00,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 19:17:00,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 19:17:00,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 19:17:00,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 19:17:00,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 19:17:00,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 19:17:00,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 19:17:00,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 19:17:00,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 19:17:00,010 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 -> e0f1c45558152fd199606f2551fe8da5ad92b45c [2019-11-20 19:17:00,321 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 19:17:00,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 19:17:00,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 19:17:00,339 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 19:17:00,340 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 19:17:00,341 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 19:17:00,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930c2d295/03f5dc47f5f648399fe34f406281f8e4/FLAGdc216d24a [2019-11-20 19:17:00,824 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 19:17:00,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 19:17:00,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930c2d295/03f5dc47f5f648399fe34f406281f8e4/FLAGdc216d24a [2019-11-20 19:17:01,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930c2d295/03f5dc47f5f648399fe34f406281f8e4 [2019-11-20 19:17:01,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 19:17:01,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 19:17:01,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 19:17:01,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 19:17:01,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 19:17:01,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@483864c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01, skipping insertion in model container [2019-11-20 19:17:01,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,227 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 19:17:01,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 19:17:01,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 19:17:01,414 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 19:17:01,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 19:17:01,444 INFO L192 MainTranslator]: Completed translation [2019-11-20 19:17:01,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01 WrapperNode [2019-11-20 19:17:01,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 19:17:01,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 19:17:01,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 19:17:01,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 19:17:01,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 19:17:01,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 19:17:01,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 19:17:01,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 19:17:01,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (1/1) ... [2019-11-20 19:17:01,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 19:17:01,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 19:17:01,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 19:17:01,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 19:17:01,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (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 [2019-11-20 19:17:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 19:17:01,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 19:17:01,974 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 19:17:01,975 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-20 19:17:01,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:17:01 BoogieIcfgContainer [2019-11-20 19:17:01,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 19:17:01,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 19:17:01,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 19:17:01,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 19:17:01,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:17:01" (1/3) ... [2019-11-20 19:17:01,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635c8204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:17:01, skipping insertion in model container [2019-11-20 19:17:01,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:01" (2/3) ... [2019-11-20 19:17:02,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635c8204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:17:01, skipping insertion in model container [2019-11-20 19:17:02,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:17:01" (3/3) ... [2019-11-20 19:17:02,002 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-11-20 19:17:02,013 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 19:17:02,021 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-20 19:17:02,041 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-20 19:17:02,083 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 19:17:02,083 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 19:17:02,084 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 19:17:02,085 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 19:17:02,085 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 19:17:02,085 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 19:17:02,085 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 19:17:02,086 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 19:17:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 19:17:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-20 19:17:02,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:02,125 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-20 19:17:02,126 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-20 19:17:02,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:02,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524380643] [2019-11-20 19:17:02,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:02,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524380643] [2019-11-20 19:17:02,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:17:02,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 19:17:02,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110065776] [2019-11-20 19:17:02,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 19:17:02,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:02,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 19:17:02,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 19:17:02,384 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2019-11-20 19:17:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:02,507 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2019-11-20 19:17:02,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 19:17:02,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-20 19:17:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:02,521 INFO L225 Difference]: With dead ends: 92 [2019-11-20 19:17:02,521 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 19:17:02,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:17:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 19:17:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2019-11-20 19:17:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 19:17:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-20 19:17:02,567 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2019-11-20 19:17:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:02,568 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-20 19:17:02,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 19:17:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-20 19:17:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 19:17:02,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:02,569 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 19:17:02,570 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:02,571 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-11-20 19:17:02,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:02,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325161472] [2019-11-20 19:17:02,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:02,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325161472] [2019-11-20 19:17:02,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:17:02,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 19:17:02,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403327361] [2019-11-20 19:17:02,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 19:17:02,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 19:17:02,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 19:17:02,619 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2019-11-20 19:17:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:02,707 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-11-20 19:17:02,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 19:17:02,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-20 19:17:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:02,709 INFO L225 Difference]: With dead ends: 49 [2019-11-20 19:17:02,709 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 19:17:02,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:17:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 19:17:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-20 19:17:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 19:17:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-20 19:17:02,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2019-11-20 19:17:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:02,721 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-20 19:17:02,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 19:17:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-20 19:17:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 19:17:02,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:02,722 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:02,722 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:02,723 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-11-20 19:17:02,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:02,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620098537] [2019-11-20 19:17:02,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:02,735 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:02,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061212932] [2019-11-20 19:17:02,736 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 [2019-11-20 19:17:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:02,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 19:17:02,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:02,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620098537] [2019-11-20 19:17:02,828 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:02,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061212932] [2019-11-20 19:17:02,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:17:02,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 19:17:02,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969802775] [2019-11-20 19:17:02,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 19:17:02,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 19:17:02,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 19:17:02,831 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2019-11-20 19:17:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:02,937 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2019-11-20 19:17:02,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 19:17:02,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-20 19:17:02,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:02,940 INFO L225 Difference]: With dead ends: 69 [2019-11-20 19:17:02,940 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 19:17:02,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:17:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 19:17:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2019-11-20 19:17:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 19:17:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-20 19:17:02,953 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2019-11-20 19:17:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:02,954 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-20 19:17:02,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 19:17:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-20 19:17:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 19:17:02,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:02,955 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:03,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:03,160 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1354107943, now seen corresponding path program 1 times [2019-11-20 19:17:03,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:03,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877978544] [2019-11-20 19:17:03,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:03,183 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:03,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782280436] [2019-11-20 19:17:03,184 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 [2019-11-20 19:17:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:03,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 19:17:03,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:03,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877978544] [2019-11-20 19:17:03,263 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:03,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782280436] [2019-11-20 19:17:03,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:17:03,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 19:17:03,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889001632] [2019-11-20 19:17:03,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 19:17:03,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:03,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 19:17:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 19:17:03,267 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2019-11-20 19:17:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:03,380 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-11-20 19:17:03,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 19:17:03,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 19:17:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:03,382 INFO L225 Difference]: With dead ends: 60 [2019-11-20 19:17:03,382 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 19:17:03,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:17:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 19:17:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-11-20 19:17:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 19:17:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-20 19:17:03,402 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2019-11-20 19:17:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:03,403 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-20 19:17:03,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 19:17:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-20 19:17:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 19:17:03,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:03,406 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 19:17:03,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:03,607 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:03,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1240091547, now seen corresponding path program 1 times [2019-11-20 19:17:03,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:03,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750597251] [2019-11-20 19:17:03,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:03,617 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:03,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332707300] [2019-11-20 19:17:03,618 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 [2019-11-20 19:17:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:03,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 19:17:03,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:03,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:03,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750597251] [2019-11-20 19:17:03,716 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:03,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332707300] [2019-11-20 19:17:03,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:03,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-20 19:17:03,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769529427] [2019-11-20 19:17:03,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 19:17:03,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 19:17:03,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:17:03,719 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2019-11-20 19:17:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:03,889 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2019-11-20 19:17:03,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 19:17:03,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-20 19:17:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:03,893 INFO L225 Difference]: With dead ends: 105 [2019-11-20 19:17:03,893 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 19:17:03,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:17:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 19:17:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-11-20 19:17:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-20 19:17:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-11-20 19:17:03,909 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 15 [2019-11-20 19:17:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:03,909 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-11-20 19:17:03,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 19:17:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-11-20 19:17:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 19:17:03,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:03,911 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2019-11-20 19:17:04,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:04,115 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1654747054, now seen corresponding path program 2 times [2019-11-20 19:17:04,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:04,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843243619] [2019-11-20 19:17:04,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:04,128 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:04,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122399362] [2019-11-20 19:17:04,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:04,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 19:17:04,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 19:17:04,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 19:17:04,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:04,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:04,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843243619] [2019-11-20 19:17:04,245 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:04,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122399362] [2019-11-20 19:17:04,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:04,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-20 19:17:04,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871796708] [2019-11-20 19:17:04,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 19:17:04,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 19:17:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:17:04,248 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 6 states. [2019-11-20 19:17:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:04,486 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2019-11-20 19:17:04,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 19:17:04,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-20 19:17:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:04,488 INFO L225 Difference]: With dead ends: 139 [2019-11-20 19:17:04,488 INFO L226 Difference]: Without dead ends: 102 [2019-11-20 19:17:04,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 19:17:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-20 19:17:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2019-11-20 19:17:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 19:17:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-11-20 19:17:04,504 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 22 [2019-11-20 19:17:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:04,504 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-11-20 19:17:04,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 19:17:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-11-20 19:17:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 19:17:04,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:04,506 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:04,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:04,717 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1585354123, now seen corresponding path program 1 times [2019-11-20 19:17:04,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:04,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488922363] [2019-11-20 19:17:04,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:04,746 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:04,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097849360] [2019-11-20 19:17:04,749 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 [2019-11-20 19:17:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:04,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 19:17:04,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:04,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:04,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488922363] [2019-11-20 19:17:04,884 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:04,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097849360] [2019-11-20 19:17:04,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:04,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-20 19:17:04,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693331547] [2019-11-20 19:17:04,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 19:17:04,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 19:17:04,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:17:04,887 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 6 states. [2019-11-20 19:17:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:05,094 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2019-11-20 19:17:05,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 19:17:05,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-20 19:17:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:05,096 INFO L225 Difference]: With dead ends: 99 [2019-11-20 19:17:05,097 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 19:17:05,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 19:17:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 19:17:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2019-11-20 19:17:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-20 19:17:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2019-11-20 19:17:05,121 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 24 [2019-11-20 19:17:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:05,127 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2019-11-20 19:17:05,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 19:17:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2019-11-20 19:17:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 19:17:05,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:05,129 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:05,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:05,337 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:05,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1185426063, now seen corresponding path program 1 times [2019-11-20 19:17:05,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:05,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118238702] [2019-11-20 19:17:05,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:05,356 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:05,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343526416] [2019-11-20 19:17:05,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:05,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 19:17:05,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 19:17:05,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118238702] [2019-11-20 19:17:05,450 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:05,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343526416] [2019-11-20 19:17:05,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:05,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-20 19:17:05,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505601822] [2019-11-20 19:17:05,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 19:17:05,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 19:17:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:17:05,454 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 6 states. [2019-11-20 19:17:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:05,609 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2019-11-20 19:17:05,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 19:17:05,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-20 19:17:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:05,610 INFO L225 Difference]: With dead ends: 120 [2019-11-20 19:17:05,611 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 19:17:05,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-20 19:17:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 19:17:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2019-11-20 19:17:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 19:17:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2019-11-20 19:17:05,624 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 29 [2019-11-20 19:17:05,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:05,625 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2019-11-20 19:17:05,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 19:17:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2019-11-20 19:17:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 19:17:05,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:05,627 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1] [2019-11-20 19:17:05,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:05,839 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1363992507, now seen corresponding path program 3 times [2019-11-20 19:17:05,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:05,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198252471] [2019-11-20 19:17:05,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:05,846 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:05,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053376284] [2019-11-20 19:17:05,847 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 [2019-11-20 19:17:05,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 19:17:05,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 19:17:05,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 19:17:05,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:05,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:05,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 19:17:06,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198252471] [2019-11-20 19:17:06,008 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:06,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053376284] [2019-11-20 19:17:06,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:06,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-20 19:17:06,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005927729] [2019-11-20 19:17:06,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 19:17:06,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:06,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 19:17:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:17:06,010 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 7 states. [2019-11-20 19:17:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:06,348 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2019-11-20 19:17:06,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 19:17:06,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-20 19:17:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:06,353 INFO L225 Difference]: With dead ends: 113 [2019-11-20 19:17:06,354 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 19:17:06,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-20 19:17:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 19:17:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-20 19:17:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 19:17:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-11-20 19:17:06,366 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 29 [2019-11-20 19:17:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:06,367 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-11-20 19:17:06,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 19:17:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-11-20 19:17:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 19:17:06,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:06,368 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:06,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:06,580 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:06,580 INFO L82 PathProgramCache]: Analyzing trace with hash -803819852, now seen corresponding path program 2 times [2019-11-20 19:17:06,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:06,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413651130] [2019-11-20 19:17:06,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:06,595 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:06,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295458147] [2019-11-20 19:17:06,596 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 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 [2019-11-20 19:17:06,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 19:17:06,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 19:17:06,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 19:17:06,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:06,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:06,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413651130] [2019-11-20 19:17:06,725 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:06,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295458147] [2019-11-20 19:17:06,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:06,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-20 19:17:06,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973455747] [2019-11-20 19:17:06,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 19:17:06,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 19:17:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:17:06,729 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 7 states. [2019-11-20 19:17:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:06,991 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-11-20 19:17:06,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 19:17:06,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-20 19:17:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:06,993 INFO L225 Difference]: With dead ends: 113 [2019-11-20 19:17:06,993 INFO L226 Difference]: Without dead ends: 111 [2019-11-20 19:17:06,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 19:17:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-20 19:17:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2019-11-20 19:17:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-20 19:17:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2019-11-20 19:17:07,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 31 [2019-11-20 19:17:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:07,004 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2019-11-20 19:17:07,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 19:17:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2019-11-20 19:17:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 19:17:07,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:07,006 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 19:17:07,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:07,213 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1656121185, now seen corresponding path program 3 times [2019-11-20 19:17:07,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:07,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865916825] [2019-11-20 19:17:07,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:07,223 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:07,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686534165] [2019-11-20 19:17:07,224 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 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 [2019-11-20 19:17:07,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 19:17:07,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 19:17:07,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 19:17:07,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:07,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:07,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865916825] [2019-11-20 19:17:07,599 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:07,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686534165] [2019-11-20 19:17:07,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:07,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-20 19:17:07,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270674444] [2019-11-20 19:17:07,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 19:17:07,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 19:17:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-20 19:17:07,601 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 9 states. [2019-11-20 19:17:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:08,023 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2019-11-20 19:17:08,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 19:17:08,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-20 19:17:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:08,026 INFO L225 Difference]: With dead ends: 115 [2019-11-20 19:17:08,027 INFO L226 Difference]: Without dead ends: 104 [2019-11-20 19:17:08,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-20 19:17:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-20 19:17:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-11-20 19:17:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 19:17:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2019-11-20 19:17:08,042 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 37 [2019-11-20 19:17:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:08,046 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2019-11-20 19:17:08,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 19:17:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2019-11-20 19:17:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 19:17:08,059 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:08,060 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:08,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:08,264 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1263094175, now seen corresponding path program 1 times [2019-11-20 19:17:08,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:08,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214372454] [2019-11-20 19:17:08,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:08,272 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:08,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377690460] [2019-11-20 19:17:08,273 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 [2019-11-20 19:17:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:17:08,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 19:17:08,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:08,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:08,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 19:17:08,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214372454] [2019-11-20 19:17:08,430 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:08,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377690460] [2019-11-20 19:17:08,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:17:08,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 19:17:08,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461723312] [2019-11-20 19:17:08,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 19:17:08,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 19:17:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:17:08,431 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 6 states. [2019-11-20 19:17:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:17:17,095 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2019-11-20 19:17:17,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 19:17:17,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-20 19:17:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:17:17,096 INFO L225 Difference]: With dead ends: 146 [2019-11-20 19:17:17,096 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 19:17:17,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:17:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 19:17:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2019-11-20 19:17:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 19:17:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2019-11-20 19:17:17,105 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 37 [2019-11-20 19:17:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:17:17,106 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2019-11-20 19:17:17,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 19:17:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2019-11-20 19:17:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 19:17:17,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:17:17,107 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:17:17,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:17:17,308 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:17:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:17:17,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2081381013, now seen corresponding path program 4 times [2019-11-20 19:17:17,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 19:17:17,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452707655] [2019-11-20 19:17:17,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 19:17:17,315 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 19:17:17,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965380749] [2019-11-20 19:17:17,316 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 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 [2019-11-20 19:17:17,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 19:17:17,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 19:17:17,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-20 19:17:17,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:17:17,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:17,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:17,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:22,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:42,199 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-20 19:17:53,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:17:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:17:53,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452707655] [2019-11-20 19:17:53,162 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 19:17:53,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965380749] [2019-11-20 19:17:53,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 19:17:53,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-20 19:17:53,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932549675] [2019-11-20 19:17:53,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 19:17:53,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 19:17:53,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 19:17:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=141, Unknown=16, NotChecked=0, Total=210 [2019-11-20 19:17:53,164 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 15 states. [2019-11-20 19:18:43,242 WARN L192 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2019-11-20 19:20:07,208 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-20 19:20:07,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 19:20:07,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 19:20:07,410 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 44 more [2019-11-20 19:20:07,421 INFO L168 Benchmark]: Toolchain (without parser) took 186209.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.2 MB). Free memory was 960.4 MB in the beginning and 814.5 MB in the end (delta: 145.9 MB). Peak memory consumption was 322.0 MB. Max. memory is 11.5 GB. [2019-11-20 19:20:07,422 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 19:20:07,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.21 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-20 19:20:07,425 INFO L168 Benchmark]: Boogie Procedure Inliner took 105.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -147.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-20 19:20:07,425 INFO L168 Benchmark]: Boogie Preprocessor took 53.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-20 19:20:07,427 INFO L168 Benchmark]: RCFGBuilder took 370.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. [2019-11-20 19:20:07,427 INFO L168 Benchmark]: TraceAbstraction took 185440.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.5 MB). Free memory was 1.1 GB in the beginning and 814.5 MB in the end (delta: 249.7 MB). Peak memory consumption was 325.2 MB. Max. memory is 11.5 GB. [2019-11-20 19:20:07,437 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 235.21 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 105.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -147.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 53.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 370.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 185440.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.5 MB). Free memory was 1.1 GB in the beginning and 814.5 MB in the end (delta: 249.7 MB). Peak memory consumption was 325.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-65a5996 [2019-11-20 19:20:09,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 19:20:09,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 19:20:09,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 19:20:09,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 19:20:09,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 19:20:09,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 19:20:09,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 19:20:09,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 19:20:09,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 19:20:09,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 19:20:09,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 19:20:09,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 19:20:09,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 19:20:09,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 19:20:09,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 19:20:09,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 19:20:09,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 19:20:09,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 19:20:09,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 19:20:09,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 19:20:09,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 19:20:09,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 19:20:09,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 19:20:09,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 19:20:09,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 19:20:09,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 19:20:09,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 19:20:09,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 19:20:09,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 19:20:09,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 19:20:09,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 19:20:09,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 19:20:09,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 19:20:09,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 19:20:09,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 19:20:09,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 19:20:09,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 19:20:09,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 19:20:09,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 19:20:09,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 19:20:09,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-20 19:20:09,448 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 19:20:09,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 19:20:09,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 19:20:09,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 19:20:09,453 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 19:20:09,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 19:20:09,453 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 19:20:09,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 19:20:09,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 19:20:09,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 19:20:09,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 19:20:09,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 19:20:09,456 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 19:20:09,456 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 19:20:09,456 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 19:20:09,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 19:20:09,457 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 19:20:09,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 19:20:09,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 19:20:09,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 19:20:09,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 19:20:09,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 19:20:09,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 19:20:09,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 19:20:09,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 19:20:09,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 19:20:09,459 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 19:20:09,459 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 19:20:09,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 19:20:09,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 19:20:09,459 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> e0f1c45558152fd199606f2551fe8da5ad92b45c [2019-11-20 19:20:09,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 19:20:09,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 19:20:09,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 19:20:09,756 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 19:20:09,757 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 19:20:09,757 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 19:20:09,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f264116/df0bf0c43291422495580f5099539bc4/FLAG65ee49fe0 [2019-11-20 19:20:10,284 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 19:20:10,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 19:20:10,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f264116/df0bf0c43291422495580f5099539bc4/FLAG65ee49fe0 [2019-11-20 19:20:10,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42f264116/df0bf0c43291422495580f5099539bc4 [2019-11-20 19:20:10,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 19:20:10,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 19:20:10,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 19:20:10,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 19:20:10,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 19:20:10,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:10,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526b845a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10, skipping insertion in model container [2019-11-20 19:20:10,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:10,675 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 19:20:10,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 19:20:10,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 19:20:10,874 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 19:20:10,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 19:20:10,919 INFO L192 MainTranslator]: Completed translation [2019-11-20 19:20:10,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10 WrapperNode [2019-11-20 19:20:10,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 19:20:10,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 19:20:10,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 19:20:10,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 19:20:10,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:10,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 19:20:11,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 19:20:11,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 19:20:11,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 19:20:11,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (1/1) ... [2019-11-20 19:20:11,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 19:20:11,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 19:20:11,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 19:20:11,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 19:20:11,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (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 [2019-11-20 19:20:11,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 19:20:11,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 19:20:11,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 19:20:11,497 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-20 19:20:11,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:20:11 BoogieIcfgContainer [2019-11-20 19:20:11,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 19:20:11,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 19:20:11,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 19:20:11,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 19:20:11,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:20:10" (1/3) ... [2019-11-20 19:20:11,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335cc674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:20:11, skipping insertion in model container [2019-11-20 19:20:11,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:20:10" (2/3) ... [2019-11-20 19:20:11,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335cc674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:20:11, skipping insertion in model container [2019-11-20 19:20:11,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:20:11" (3/3) ... [2019-11-20 19:20:11,506 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-11-20 19:20:11,515 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 19:20:11,522 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-20 19:20:11,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-20 19:20:11,560 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 19:20:11,560 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 19:20:11,560 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 19:20:11,561 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 19:20:11,561 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 19:20:11,561 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 19:20:11,561 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 19:20:11,561 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 19:20:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 19:20:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-20 19:20:11,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:20:11,586 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-20 19:20:11,587 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:20:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:20:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-20 19:20:11,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:20:11,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1595391497] [2019-11-20 19:20:11,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:20:11,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 19:20:11,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:20:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:11,712 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:20:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:11,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595391497] [2019-11-20 19:20:11,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:20:11,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 19:20:11,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392444245] [2019-11-20 19:20:11,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 19:20:11,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:20:11,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 19:20:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:20:11,762 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2019-11-20 19:20:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:20:12,033 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2019-11-20 19:20:12,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 19:20:12,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-11-20 19:20:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:20:12,045 INFO L225 Difference]: With dead ends: 92 [2019-11-20 19:20:12,046 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 19:20:12,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:20:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 19:20:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2019-11-20 19:20:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 19:20:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-20 19:20:12,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2019-11-20 19:20:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:20:12,092 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-20 19:20:12,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 19:20:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-20 19:20:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 19:20:12,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:20:12,093 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 19:20:12,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:12,295 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:20:12,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:20:12,296 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-11-20 19:20:12,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:20:12,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1736254963] [2019-11-20 19:20:12,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:20:12,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 19:20:12,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:20:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:12,370 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:20:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:12,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736254963] [2019-11-20 19:20:12,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:20:12,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 19:20:12,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776460012] [2019-11-20 19:20:12,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 19:20:12,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:20:12,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 19:20:12,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:20:12,389 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2019-11-20 19:20:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:20:12,597 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-11-20 19:20:12,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 19:20:12,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-20 19:20:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:20:12,599 INFO L225 Difference]: With dead ends: 49 [2019-11-20 19:20:12,599 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 19:20:12,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:20:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 19:20:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-20 19:20:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 19:20:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-20 19:20:12,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2019-11-20 19:20:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:20:12,609 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-20 19:20:12,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 19:20:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-20 19:20:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 19:20:12,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:20:12,610 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:20:12,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:12,812 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:20:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:20:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-11-20 19:20:12,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:20:12,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [177191197] [2019-11-20 19:20:12,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:20:12,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 19:20:12,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:20:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:12,934 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:20:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:13,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [177191197] [2019-11-20 19:20:13,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:20:13,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 19:20:13,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273620239] [2019-11-20 19:20:13,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 19:20:13,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:20:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 19:20:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:20:13,024 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2019-11-20 19:20:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:20:15,945 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-20 19:20:15,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 19:20:15,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-20 19:20:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:20:15,948 INFO L225 Difference]: With dead ends: 85 [2019-11-20 19:20:15,948 INFO L226 Difference]: Without dead ends: 63 [2019-11-20 19:20:15,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 19:20:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-20 19:20:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2019-11-20 19:20:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 19:20:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-20 19:20:15,965 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 8 [2019-11-20 19:20:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:20:15,965 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-20 19:20:15,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 19:20:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-20 19:20:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 19:20:15,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:20:15,967 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:20:16,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:16,170 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:20:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:20:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1354107943, now seen corresponding path program 1 times [2019-11-20 19:20:16,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:20:16,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [669699572] [2019-11-20 19:20:16,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:20:16,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 19:20:16,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:20:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:16,309 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:20:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:16,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [669699572] [2019-11-20 19:20:16,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 19:20:16,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 19:20:16,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493545422] [2019-11-20 19:20:16,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 19:20:16,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:20:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 19:20:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 19:20:16,356 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 5 states. [2019-11-20 19:20:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:20:16,622 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-11-20 19:20:16,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 19:20:16,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 19:20:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:20:16,624 INFO L225 Difference]: With dead ends: 72 [2019-11-20 19:20:16,624 INFO L226 Difference]: Without dead ends: 61 [2019-11-20 19:20:16,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 19:20:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-20 19:20:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2019-11-20 19:20:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-20 19:20:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-11-20 19:20:16,637 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2019-11-20 19:20:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:20:16,637 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-11-20 19:20:16,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 19:20:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-11-20 19:20:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 19:20:16,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:20:16,638 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2019-11-20 19:20:16,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:16,841 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:20:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:20:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1654747054, now seen corresponding path program 1 times [2019-11-20 19:20:16,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:20:16,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [309389649] [2019-11-20 19:20:16,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:20:17,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 19:20:17,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:20:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:17,084 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:20:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 2 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:19,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [309389649] [2019-11-20 19:20:19,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 19:20:19,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 19:20:19,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887594286] [2019-11-20 19:20:19,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 19:20:19,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:20:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 19:20:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=60, Unknown=1, NotChecked=0, Total=90 [2019-11-20 19:20:19,495 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 10 states. [2019-11-20 19:20:22,868 WARN L192 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 19:20:25,217 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 14 [2019-11-20 19:20:27,594 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 19:20:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:20:31,373 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2019-11-20 19:20:31,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 19:20:31,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-20 19:20:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:20:31,375 INFO L225 Difference]: With dead ends: 112 [2019-11-20 19:20:31,375 INFO L226 Difference]: Without dead ends: 98 [2019-11-20 19:20:31,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=142, Invalid=277, Unknown=1, NotChecked=0, Total=420 [2019-11-20 19:20:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-20 19:20:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 46. [2019-11-20 19:20:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-20 19:20:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-11-20 19:20:31,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2019-11-20 19:20:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:20:31,391 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-11-20 19:20:31,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 19:20:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-11-20 19:20:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 19:20:31,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:20:31,396 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:20:31,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:31,599 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:20:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:20:31,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1585354123, now seen corresponding path program 1 times [2019-11-20 19:20:31,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:20:31,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1530800941] [2019-11-20 19:20:31,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:20:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:20:31,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 19:20:31,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:20:32,216 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 19:20:32,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:20:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:32,771 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:20:35,388 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-11-20 19:20:37,222 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 19:20:38,987 WARN L192 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 19:20:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:20:38,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1530800941] [2019-11-20 19:20:38,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 19:20:38,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-20 19:20:38,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474557101] [2019-11-20 19:20:38,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 19:20:38,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:20:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 19:20:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-20 19:20:38,996 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2019-11-20 19:20:42,713 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 19:20:44,182 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2019-11-20 19:20:45,216 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 19:20:46,276 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-20 19:20:52,232 WARN L192 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 19:20:58,407 WARN L192 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 34 [2019-11-20 19:21:09,814 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 19:21:15,081 WARN L192 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 19:21:17,767 WARN L192 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 19:21:24,190 WARN L192 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 19:21:28,717 WARN L192 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-20 19:21:37,338 WARN L192 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 19:21:40,512 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 19:21:46,338 WARN L192 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 19:21:48,498 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-20 19:21:50,393 WARN L192 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 19:21:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:21:53,174 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2019-11-20 19:21:53,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 19:21:53,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-11-20 19:21:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:21:53,196 INFO L225 Difference]: With dead ends: 153 [2019-11-20 19:21:53,196 INFO L226 Difference]: Without dead ends: 127 [2019-11-20 19:21:53,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 19:21:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-20 19:21:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 69. [2019-11-20 19:21:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 19:21:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-11-20 19:21:53,211 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 24 [2019-11-20 19:21:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:21:53,212 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-11-20 19:21:53,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 19:21:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-11-20 19:21:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 19:21:53,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:21:53,214 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:21:53,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:21:53,417 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:21:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:21:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1185426063, now seen corresponding path program 1 times [2019-11-20 19:21:53,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:21:53,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [922766721] [2019-11-20 19:21:53,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:21:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:21:53,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 19:21:53,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:21:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 19:21:53,806 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:21:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 19:21:54,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [922766721] [2019-11-20 19:21:54,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 19:21:54,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-20 19:21:54,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788793589] [2019-11-20 19:21:54,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 19:21:54,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:21:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 19:21:54,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 19:21:54,357 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 9 states. [2019-11-20 19:21:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:21:55,150 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2019-11-20 19:21:55,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 19:21:55,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-20 19:21:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:21:55,151 INFO L225 Difference]: With dead ends: 93 [2019-11-20 19:21:55,151 INFO L226 Difference]: Without dead ends: 91 [2019-11-20 19:21:55,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-11-20 19:21:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-20 19:21:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2019-11-20 19:21:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 19:21:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2019-11-20 19:21:55,165 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 29 [2019-11-20 19:21:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:21:55,165 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2019-11-20 19:21:55,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 19:21:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2019-11-20 19:21:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 19:21:55,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:21:55,167 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 19:21:55,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:21:55,378 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:21:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:21:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1904897800, now seen corresponding path program 2 times [2019-11-20 19:21:55,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:21:55,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [627110110] [2019-11-20 19:21:55,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:21:55,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 19:21:55,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 19:21:55,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 19:21:55,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:21:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:21:55,729 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:21:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:21:56,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627110110] [2019-11-20 19:21:56,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 19:21:56,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 5 [2019-11-20 19:21:56,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101660359] [2019-11-20 19:21:56,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 19:21:56,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:21:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 19:21:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:21:56,016 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 6 states. [2019-11-20 19:21:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:21:56,336 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2019-11-20 19:21:56,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 19:21:56,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-20 19:21:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:21:56,338 INFO L225 Difference]: With dead ends: 93 [2019-11-20 19:21:56,338 INFO L226 Difference]: Without dead ends: 69 [2019-11-20 19:21:56,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 19:21:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-20 19:21:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-20 19:21:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 19:21:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-11-20 19:21:56,349 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 30 [2019-11-20 19:21:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:21:56,349 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-11-20 19:21:56,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 19:21:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-11-20 19:21:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 19:21:56,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:21:56,350 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:21:56,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:21:56,555 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:21:56,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:21:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1028271282, now seen corresponding path program 1 times [2019-11-20 19:21:56,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:21:56,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1353103184] [2019-11-20 19:21:56,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:21:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 19:21:56,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 19:21:56,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 19:21:57,565 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2019-11-20 19:21:57,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 19:21:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:21:57,892 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 19:22:00,642 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-11-20 19:22:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 19:22:00,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353103184] [2019-11-20 19:22:00,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 19:22:00,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 19:22:00,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793882499] [2019-11-20 19:22:00,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 19:22:00,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 19:22:00,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 19:22:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-20 19:22:00,652 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 12 states. [2019-11-20 19:22:04,969 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2019-11-20 19:22:06,518 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 19:22:10,979 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 19:22:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 19:22:11,057 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-20 19:22:11,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 19:22:11,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-11-20 19:22:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 19:22:11,059 INFO L225 Difference]: With dead ends: 75 [2019-11-20 19:22:11,059 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 19:22:11,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2019-11-20 19:22:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 19:22:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-20 19:22:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 19:22:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-20 19:22:11,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 31 [2019-11-20 19:22:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 19:22:11,079 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-20 19:22:11,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 19:22:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-20 19:22:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 19:22:11,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 19:22:11,080 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 19:22:11,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:22:11,284 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 19:22:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 19:22:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -803819852, now seen corresponding path program 3 times [2019-11-20 19:22:11,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 19:22:11,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1811471162] [2019-11-20 19:22:11,286 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:22:11,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 19:22:11,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-20 19:22:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 19:22:12,030 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 19:22:12,031 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 19:22:12,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 19:22:12,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:22:12 BoogieIcfgContainer [2019-11-20 19:22:12,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 19:22:12,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 19:22:12,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 19:22:12,263 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 19:22:12,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:20:11" (3/4) ... [2019-11-20 19:22:12,265 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 19:22:12,317 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-20 19:22:12,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 19:22:12,319 INFO L168 Benchmark]: Toolchain (without parser) took 121661.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.9 MB). Free memory was 949.6 MB in the beginning and 932.8 MB in the end (delta: 16.9 MB). Peak memory consumption was 219.8 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,320 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 976.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 19:22:12,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.94 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 938.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,321 INFO L168 Benchmark]: Boogie Procedure Inliner took 105.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,321 INFO L168 Benchmark]: Boogie Preprocessor took 29.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,322 INFO L168 Benchmark]: RCFGBuilder took 442.95 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,323 INFO L168 Benchmark]: TraceAbstraction took 120762.41 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 939.9 MB in the end (delta: 177.4 MB). Peak memory consumption was 233.5 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,323 INFO L168 Benchmark]: Witness Printer took 55.07 ms. Allocated memory is still 1.2 GB. Free memory was 939.9 MB in the beginning and 932.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-20 19:22:12,327 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 976.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.94 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 938.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 105.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 442.95 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 120762.41 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 939.9 MB in the end (delta: 177.4 MB). Peak memory consumption was 233.5 MB. Max. memory is 11.5 GB. * Witness Printer took 55.07 ms. Allocated memory is still 1.2 GB. Free memory was 939.9 MB in the beginning and 932.8 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: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int A, B; [L19] int r, d, p, q; [L20] A = __VERIFIER_nondet_int() [L21] B = __VERIFIER_nondet_int() [L24] r = A [L25] d = B [L26] p = 1 [L27] q = 0 [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND FALSE !(!(r >= d)) [L35] d = 2 * d [L36] p = 2 * p [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND FALSE !(!(r >= d)) [L35] d = 2 * d [L36] p = 2 * p [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND TRUE !(r >= d) [L39] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L43] COND FALSE !(!(p != 1)) [L45] d = d / 2 [L46] p = p / 2 [L47] COND TRUE r >= d [L48] r = r - d [L49] q = q + p [L39] COND TRUE 1 [L10] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Result: UNSAFE, OverallTime: 120.7s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 101.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 217 SDtfs, 504 SDslu, 557 SDs, 0 SdLazy, 831 SolverSat, 356 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 44.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 67.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, 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, 9 MinimizatonAttempts, 179 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 312 ConstructedInterpolants, 21 QuantifiedInterpolants, 68288 SizeOfPredicates, 47 NumberOfNonLiveVariables, 331 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 34/138 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...