./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn3f.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 ebf5d98846752a57fac2a507e38ab464af4ccce6 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 15:34:06,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:34:06,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:34:06,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:34:06,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:34:06,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:34:06,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:34:06,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:34:06,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:34:06,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:34:06,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:34:06,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:34:06,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:34:06,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:34:06,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:34:06,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:34:06,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:34:06,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:34:06,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:34:06,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:34:06,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:34:06,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:34:06,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:34:06,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:34:06,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:34:06,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:34:06,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:34:06,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:34:06,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:34:06,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:34:06,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:34:06,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:34:06,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:34:06,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:34:06,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:34:06,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:34:06,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:34:06,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:34:06,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:34:06,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:34:06,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:34:06,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:34:06,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:34:06,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:34:06,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:34:06,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:34:06,651 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:34:06,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:34:06,651 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:34:06,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:34:06,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:34:06,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:34:06,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:34:06,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:34:06,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:34:06,653 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:34:06,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:34:06,654 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:34:06,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:34:06,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:34:06,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:34:06,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:34:06,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:34:06,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:34:06,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:34:06,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:34:06,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:34:06,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:34:06,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:34:06,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:34:06,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:34:06,658 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 -> ebf5d98846752a57fac2a507e38ab464af4ccce6 [2019-11-28 15:34:06,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:34:06,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:34:07,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:34:07,005 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:34:07,006 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:34:07,007 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-11-28 15:34:07,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef40f6021/31fc2b8800d04cd6b7d7af3392b9942e/FLAGa7624cb8f [2019-11-28 15:34:07,542 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:34:07,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn3f.c [2019-11-28 15:34:07,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef40f6021/31fc2b8800d04cd6b7d7af3392b9942e/FLAGa7624cb8f [2019-11-28 15:34:07,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef40f6021/31fc2b8800d04cd6b7d7af3392b9942e [2019-11-28 15:34:07,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:34:07,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:34:07,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:34:07,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:34:07,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:34:07,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:34:07" (1/1) ... [2019-11-28 15:34:07,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc4abe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:07, skipping insertion in model container [2019-11-28 15:34:07,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:34:07" (1/1) ... [2019-11-28 15:34:07,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:34:08,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:34:08,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:34:08,192 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:34:08,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:34:08,284 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:34:08,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08 WrapperNode [2019-11-28 15:34:08,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:34:08,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:34:08,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:34:08,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:34:08,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:34:08,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:34:08,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:34:08,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:34:08,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... [2019-11-28 15:34:08,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:34:08,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:34:08,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:34:08,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:34:08,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:34:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:34:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 15:34:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:34:08,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:34:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:34:08,693 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:34:08,693 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 15:34:08,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:34:08 BoogieIcfgContainer [2019-11-28 15:34:08,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:34:08,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:34:08,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:34:08,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:34:08,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:34:07" (1/3) ... [2019-11-28 15:34:08,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad04de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:34:08, skipping insertion in model container [2019-11-28 15:34:08,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:08" (2/3) ... [2019-11-28 15:34:08,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad04de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:34:08, skipping insertion in model container [2019-11-28 15:34:08,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:34:08" (3/3) ... [2019-11-28 15:34:08,721 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2019-11-28 15:34:08,732 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:34:08,739 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:34:08,761 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:34:08,787 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:34:08,787 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:34:08,787 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:34:08,787 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:34:08,788 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:34:08,789 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:34:08,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:34:08,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:34:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-28 15:34:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 15:34:08,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:08,811 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:08,812 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:08,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1201566748, now seen corresponding path program 1 times [2019-11-28 15:34:08,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:08,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169372865] [2019-11-28 15:34:08,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:34:08,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169372865] [2019-11-28 15:34:08,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:08,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:34:08,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391522826] [2019-11-28 15:34:08,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:34:08,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:34:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:34:08,970 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-28 15:34:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:08,986 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2019-11-28 15:34:08,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:34:08,988 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 15:34:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:08,996 INFO L225 Difference]: With dead ends: 36 [2019-11-28 15:34:08,997 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 15:34:08,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:34:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 15:34:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 15:34:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 15:34:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 15:34:09,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-28 15:34:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:09,032 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 15:34:09,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:34:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 15:34:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 15:34:09,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:09,033 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:09,033 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1920794649, now seen corresponding path program 1 times [2019-11-28 15:34:09,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:09,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519743570] [2019-11-28 15:34:09,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:09,052 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:09,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405144794] [2019-11-28 15:34:09,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:09,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:34:09,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:34:09,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519743570] [2019-11-28 15:34:09,171 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:09,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405144794] [2019-11-28 15:34:09,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:09,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:34:09,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759217474] [2019-11-28 15:34:09,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:34:09,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:34:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:34:09,177 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2019-11-28 15:34:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:09,256 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-28 15:34:09,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:34:09,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-28 15:34:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:09,257 INFO L225 Difference]: With dead ends: 31 [2019-11-28 15:34:09,257 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 15:34:09,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:34:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 15:34:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-28 15:34:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 15:34:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-28 15:34:09,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-28 15:34:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:09,267 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-28 15:34:09,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:34:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-28 15:34:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 15:34:09,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:09,270 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:09,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:09,477 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1948223762, now seen corresponding path program 1 times [2019-11-28 15:34:09,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:09,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290902614] [2019-11-28 15:34:09,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:09,494 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:09,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970838927] [2019-11-28 15:34:09,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:09,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:34:09,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:34:09,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290902614] [2019-11-28 15:34:09,595 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:09,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970838927] [2019-11-28 15:34:09,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:09,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:34:09,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653162707] [2019-11-28 15:34:09,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:34:09,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:34:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:34:09,600 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2019-11-28 15:34:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:09,674 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-11-28 15:34:09,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:34:09,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-28 15:34:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:09,676 INFO L225 Difference]: With dead ends: 36 [2019-11-28 15:34:09,676 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 15:34:09,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:34:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 15:34:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2019-11-28 15:34:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 15:34:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-28 15:34:09,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2019-11-28 15:34:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:09,683 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-28 15:34:09,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:34:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-28 15:34:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:34:09,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:09,685 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:09,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:09,889 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1326513248, now seen corresponding path program 1 times [2019-11-28 15:34:09,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:09,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890074575] [2019-11-28 15:34:09,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:09,919 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:09,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629475002] [2019-11-28 15:34:09,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:09,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 15:34:09,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:10,012 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 15:34:10,013 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:10,019 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:10,020 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:10,020 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-28 15:34:10,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:34:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:34:10,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890074575] [2019-11-28 15:34:10,061 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:10,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629475002] [2019-11-28 15:34:10,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:10,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 15:34:10,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83440429] [2019-11-28 15:34:10,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:34:10,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:34:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:34:10,064 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2019-11-28 15:34:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:10,169 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-11-28 15:34:10,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 15:34:10,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-28 15:34:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:10,171 INFO L225 Difference]: With dead ends: 37 [2019-11-28 15:34:10,171 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 15:34:10,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:34:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 15:34:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-11-28 15:34:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-28 15:34:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-11-28 15:34:10,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2019-11-28 15:34:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:10,180 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-11-28 15:34:10,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:34:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-11-28 15:34:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:34:10,182 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:10,182 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:10,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:10,386 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 448494114, now seen corresponding path program 1 times [2019-11-28 15:34:10,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:10,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753192523] [2019-11-28 15:34:10,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:10,421 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:10,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903725989] [2019-11-28 15:34:10,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:10,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:34:10,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:34:10,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753192523] [2019-11-28 15:34:10,478 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:10,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903725989] [2019-11-28 15:34:10,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:34:10,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:34:10,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418285972] [2019-11-28 15:34:10,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:34:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:34:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:34:10,481 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 3 states. [2019-11-28 15:34:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:10,535 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-11-28 15:34:10,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:34:10,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-28 15:34:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:10,538 INFO L225 Difference]: With dead ends: 48 [2019-11-28 15:34:10,538 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 15:34:10,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:34:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 15:34:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-28 15:34:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 15:34:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-28 15:34:10,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-28 15:34:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:10,550 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-28 15:34:10,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:34:10,550 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-28 15:34:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 15:34:10,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:10,552 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:10,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:10,765 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash -579781034, now seen corresponding path program 1 times [2019-11-28 15:34:10,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:10,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393061885] [2019-11-28 15:34:10,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:10,790 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:10,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747882793] [2019-11-28 15:34:10,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:10,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:34:10,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:34:10,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393061885] [2019-11-28 15:34:10,896 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:10,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747882793] [2019-11-28 15:34:10,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:34:10,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-28 15:34:10,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092639729] [2019-11-28 15:34:10,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 15:34:10,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 15:34:10,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:34:10,899 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2019-11-28 15:34:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:11,045 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2019-11-28 15:34:11,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 15:34:11,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-28 15:34:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:11,047 INFO L225 Difference]: With dead ends: 63 [2019-11-28 15:34:11,047 INFO L226 Difference]: Without dead ends: 39 [2019-11-28 15:34:11,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-28 15:34:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-28 15:34:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-11-28 15:34:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 15:34:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-28 15:34:11,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2019-11-28 15:34:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:11,055 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-28 15:34:11,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 15:34:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-28 15:34:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 15:34:11,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:11,057 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:11,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:11,258 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1490131379, now seen corresponding path program 1 times [2019-11-28 15:34:11,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:11,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738808537] [2019-11-28 15:34:11,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:11,279 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:11,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132966422] [2019-11-28 15:34:11,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:34:11,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-28 15:34:11,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:11,354 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-28 15:34:11,355 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,360 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:11,361 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,361 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-28 15:34:11,374 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 15:34:11,374 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,380 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:34:11,380 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,381 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-28 15:34:11,457 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-28 15:34:11,458 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 62 [2019-11-28 15:34:11,460 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,488 INFO L614 ElimStorePlain]: treesize reduction 32, result has 53.6 percent of original size [2019-11-28 15:34:11,490 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 15:34:11,491 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2019-11-28 15:34:11,603 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-28 15:34:11,604 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 71 [2019-11-28 15:34:11,606 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,639 INFO L614 ElimStorePlain]: treesize reduction 51, result has 48.0 percent of original size [2019-11-28 15:34:11,641 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 15:34:11,641 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:47 [2019-11-28 15:34:11,801 INFO L343 Elim1Store]: treesize reduction 39, result has 45.8 percent of original size [2019-11-28 15:34:11,802 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 85 [2019-11-28 15:34:11,806 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:34:11,848 INFO L614 ElimStorePlain]: treesize reduction 59, result has 50.8 percent of original size [2019-11-28 15:34:11,849 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-28 15:34:11,849 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:61 [2019-11-28 15:34:11,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:34:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:34:12,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738808537] [2019-11-28 15:34:12,024 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:12,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132966422] [2019-11-28 15:34:12,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:34:12,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-28 15:34:12,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647082439] [2019-11-28 15:34:12,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 15:34:12,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:12,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 15:34:12,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:34:12,026 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 13 states. [2019-11-28 15:34:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:12,755 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-11-28 15:34:12,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 15:34:12,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-11-28 15:34:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:12,757 INFO L225 Difference]: With dead ends: 59 [2019-11-28 15:34:12,757 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 15:34:12,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-28 15:34:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 15:34:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2019-11-28 15:34:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 15:34:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-28 15:34:12,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2019-11-28 15:34:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:12,764 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-28 15:34:12,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 15:34:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-28 15:34:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-28 15:34:12,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:12,765 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:12,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:12,969 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash 119837417, now seen corresponding path program 2 times [2019-11-28 15:34:12,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:12,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150604099] [2019-11-28 15:34:12,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:12,984 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:12,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320175762] [2019-11-28 15:34:12,984 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:13,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:34:13,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:34:13,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 15:34:13,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:34:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 15:34:13,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150604099] [2019-11-28 15:34:13,072 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:34:13,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320175762] [2019-11-28 15:34:13,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:34:13,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-28 15:34:13,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070619267] [2019-11-28 15:34:13,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 15:34:13,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:34:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 15:34:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-28 15:34:13,079 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2019-11-28 15:34:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:34:13,248 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2019-11-28 15:34:13,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:34:13,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-28 15:34:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:34:13,250 INFO L225 Difference]: With dead ends: 84 [2019-11-28 15:34:13,250 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 15:34:13,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:34:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 15:34:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-11-28 15:34:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-28 15:34:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-28 15:34:13,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-11-28 15:34:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:34:13,258 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-28 15:34:13,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 15:34:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-28 15:34:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-28 15:34:13,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:34:13,261 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:34:13,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:13,465 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:34:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:34:13,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1383270612, now seen corresponding path program 3 times [2019-11-28 15:34:13,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:34:13,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748232064] [2019-11-28 15:34:13,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:34:13,482 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:34:13,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321831829] [2019-11-28 15:34:13,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:13,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 15:34:13,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-28 15:34:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:34:13,643 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:34:13,643 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:34:13,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:34:13,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:34:13 BoogieIcfgContainer [2019-11-28 15:34:13,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:34:13,896 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:34:13,896 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:34:13,897 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:34:13,897 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:34:08" (3/4) ... [2019-11-28 15:34:13,899 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:34:13,966 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:34:13,966 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:34:13,968 INFO L168 Benchmark]: Toolchain (without parser) took 5988.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.0 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -135.0 MB). Peak memory consumption was 70.0 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:13,968 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:34:13,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -175.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:13,969 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:34:13,970 INFO L168 Benchmark]: Boogie Preprocessor took 27.68 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. [2019-11-28 15:34:13,971 INFO L168 Benchmark]: RCFGBuilder took 349.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:13,971 INFO L168 Benchmark]: TraceAbstraction took 5199.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.9 MB). Peak memory consumption was 66.4 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:13,972 INFO L168 Benchmark]: Witness Printer took 70.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-28 15:34:13,975 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 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 304.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -175.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.68 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 349.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5199.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.9 MB). Peak memory consumption was 66.4 MB. Max. memory is 11.5 GB. * Witness Printer took 70.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] i=0 VAL [N=3] [L26] COND TRUE i