./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test27-2.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/ldv-regression/test27-2.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 dfe25ce750efb74d780ec4e5d4c6de923e91c57e .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 16:57:40,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:57:40,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:57:40,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:57:40,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:57:40,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:57:40,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:57:40,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:57:40,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:57:40,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:57:40,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:57:40,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:57:40,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:57:40,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:57:40,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:57:40,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:57:40,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:57:40,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:57:40,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:57:40,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:57:40,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:57:40,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:57:40,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:57:40,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:57:40,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:57:40,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:57:40,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:57:40,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:57:40,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:57:40,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:57:40,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:57:40,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:57:40,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:57:40,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:57:40,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:57:40,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:57:40,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:57:40,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:57:40,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:57:40,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:57:40,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:57:40,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:57:40,534 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:57:40,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:57:40,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:57:40,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:57:40,536 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:57:40,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:57:40,537 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:57:40,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:57:40,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:57:40,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:57:40,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:57:40,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:57:40,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:57:40,538 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:57:40,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:57:40,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:57:40,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:57:40,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:57:40,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:57:40,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:57:40,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:57:40,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:40,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:57:40,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:57:40,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:57:40,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:57:40,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:57:40,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:57:40,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:57:40,542 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 -> dfe25ce750efb74d780ec4e5d4c6de923e91c57e [2019-11-28 16:57:40,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:57:40,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:57:40,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:57:40,847 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:57:40,847 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:57:40,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test27-2.c [2019-11-28 16:57:40,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65fa1fc13/0d5ab0e0df6b4ee794dcd4a7b53efaf3/FLAG957cdd99f [2019-11-28 16:57:41,410 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:57:41,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test27-2.c [2019-11-28 16:57:41,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65fa1fc13/0d5ab0e0df6b4ee794dcd4a7b53efaf3/FLAG957cdd99f [2019-11-28 16:57:41,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65fa1fc13/0d5ab0e0df6b4ee794dcd4a7b53efaf3 [2019-11-28 16:57:41,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:57:41,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:57:41,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:41,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:57:41,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:57:41,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:41" (1/1) ... [2019-11-28 16:57:41,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed5cf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:41, skipping insertion in model container [2019-11-28 16:57:41,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:41" (1/1) ... [2019-11-28 16:57:41,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:57:41,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:57:42,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:42,017 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:57:42,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:42,111 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:57:42,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42 WrapperNode [2019-11-28 16:57:42,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:42,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:42,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:57:42,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:57:42,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:42,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:57:42,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:57:42,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:57:42,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:57:42,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:57:42,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:57:42,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:57:42,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (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 16:57:42,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:57:42,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:57:42,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:57:42,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:57:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:57:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:57:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:57:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:57:42,623 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:57:42,624 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 16:57:42,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:42 BoogieIcfgContainer [2019-11-28 16:57:42,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:57:42,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:57:42,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:57:42,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:57:42,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:41" (1/3) ... [2019-11-28 16:57:42,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f68b845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:42, skipping insertion in model container [2019-11-28 16:57:42,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (2/3) ... [2019-11-28 16:57:42,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f68b845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:42, skipping insertion in model container [2019-11-28 16:57:42,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:42" (3/3) ... [2019-11-28 16:57:42,643 INFO L109 eAbstractionObserver]: Analyzing ICFG test27-2.c [2019-11-28 16:57:42,658 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:57:42,667 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:57:42,685 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:57:42,715 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:57:42,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:57:42,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:57:42,716 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:57:42,716 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:57:42,716 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:57:42,717 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:57:42,717 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:57:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-28 16:57:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:57:42,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:42,741 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:42,741 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2019-11-28 16:57:42,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:42,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009243123] [2019-11-28 16:57:42,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:42,928 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 16:57:42,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009243123] [2019-11-28 16:57:42,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:42,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:57:42,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013568184] [2019-11-28 16:57:42,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:57:42,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:57:42,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:57:42,953 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-28 16:57:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:42,974 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-11-28 16:57:42,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:57:42,976 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 16:57:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:42,988 INFO L225 Difference]: With dead ends: 30 [2019-11-28 16:57:42,988 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 16:57:42,997 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 16:57:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 16:57:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 16:57:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 16:57:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-28 16:57:43,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-28 16:57:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:43,051 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-28 16:57:43,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:57:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-28 16:57:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:57:43,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:43,053 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:43,054 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:43,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2019-11-28 16:57:43,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:43,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349343518] [2019-11-28 16:57:43,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,208 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 16:57:43,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349343518] [2019-11-28 16:57:43,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:43,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 16:57:43,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174772777] [2019-11-28 16:57:43,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:57:43,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:43,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:57:43,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:43,213 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-28 16:57:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:43,251 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-28 16:57:43,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:57:43,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-28 16:57:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:43,252 INFO L225 Difference]: With dead ends: 24 [2019-11-28 16:57:43,252 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 16:57:43,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 16:57:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 16:57:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-28 16:57:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 16:57:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 16:57:43,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-28 16:57:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:43,258 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 16:57:43,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:57:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 16:57:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 16:57:43,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:43,259 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:43,260 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2019-11-28 16:57:43,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:43,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212863056] [2019-11-28 16:57:43,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212863056] [2019-11-28 16:57:43,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089468753] [2019-11-28 16:57:43,359 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 16:57:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 16:57:43,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:43,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 16:57:43,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302897781] [2019-11-28 16:57:43,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:57:43,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:57:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:57:43,481 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-28 16:57:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:43,530 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-28 16:57:43,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:57:43,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-28 16:57:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:43,533 INFO L225 Difference]: With dead ends: 26 [2019-11-28 16:57:43,533 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 16:57:43,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:57:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 16:57:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-28 16:57:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 16:57:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-28 16:57:43,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-28 16:57:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:43,544 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-28 16:57:43,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:57:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-28 16:57:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 16:57:43,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:43,545 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:43,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:43,750 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2019-11-28 16:57:43,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:43,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001312742] [2019-11-28 16:57:43,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001312742] [2019-11-28 16:57:43,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412168868] [2019-11-28 16:57:43,858 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 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 16:57:43,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 16:57:43,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:43,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 16:57:43,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:43,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-28 16:57:43,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971658270] [2019-11-28 16:57:43,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 16:57:43,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 16:57:43,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:57:43,978 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-28 16:57:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:44,018 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-28 16:57:44,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:57:44,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-28 16:57:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:44,021 INFO L225 Difference]: With dead ends: 28 [2019-11-28 16:57:44,021 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 16:57:44,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:57:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 16:57:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-28 16:57:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 16:57:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-28 16:57:44,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-28 16:57:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:44,028 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-28 16:57:44,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 16:57:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-28 16:57:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 16:57:44,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:44,029 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:44,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:44,231 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2019-11-28 16:57:44,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:44,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859271975] [2019-11-28 16:57:44,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:44,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859271975] [2019-11-28 16:57:44,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052259942] [2019-11-28 16:57:44,316 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 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 16:57:44,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 16:57:44,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:44,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 16:57:44,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:44,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:44,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 16:57:44,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335522641] [2019-11-28 16:57:44,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 16:57:44,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 16:57:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:57:44,561 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-28 16:57:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:44,611 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-28 16:57:44,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 16:57:44,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-28 16:57:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:44,613 INFO L225 Difference]: With dead ends: 30 [2019-11-28 16:57:44,613 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 16:57:44,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:57:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 16:57:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-28 16:57:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 16:57:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 16:57:44,619 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-28 16:57:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:44,620 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 16:57:44,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 16:57:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 16:57:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 16:57:44,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:44,622 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:44,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:44,824 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2019-11-28 16:57:44,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:44,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225235094] [2019-11-28 16:57:44,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:44,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225235094] [2019-11-28 16:57:44,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202344153] [2019-11-28 16:57:44,929 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 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 16:57:45,010 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 16:57:45,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:45,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 16:57:45,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:45,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:45,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 16:57:45,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846773865] [2019-11-28 16:57:45,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 16:57:45,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 16:57:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:57:45,032 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-28 16:57:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:45,093 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-28 16:57:45,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 16:57:45,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-28 16:57:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:45,095 INFO L225 Difference]: With dead ends: 32 [2019-11-28 16:57:45,095 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 16:57:45,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:57:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 16:57:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-28 16:57:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 16:57:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-28 16:57:45,102 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-28 16:57:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:45,103 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-28 16:57:45,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 16:57:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-28 16:57:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 16:57:45,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:45,104 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:45,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:45,309 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2019-11-28 16:57:45,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:45,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793385338] [2019-11-28 16:57:45,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:45,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793385338] [2019-11-28 16:57:45,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42506695] [2019-11-28 16:57:45,480 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:46,329 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 16:57:46,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:46,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 16:57:46,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:46,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 16:57:46,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722778544] [2019-11-28 16:57:46,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 16:57:46,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:46,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 16:57:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 16:57:46,357 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-28 16:57:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:46,403 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-28 16:57:46,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 16:57:46,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 16:57:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:46,405 INFO L225 Difference]: With dead ends: 34 [2019-11-28 16:57:46,405 INFO L226 Difference]: Without dead ends: 25 [2019-11-28 16:57:46,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 16:57:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-28 16:57:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-28 16:57:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 16:57:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-28 16:57:46,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-28 16:57:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:46,411 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-28 16:57:46,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 16:57:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-28 16:57:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 16:57:46,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:46,413 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:46,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:46,624 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2019-11-28 16:57:46,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:46,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240774964] [2019-11-28 16:57:46,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240774964] [2019-11-28 16:57:46,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040541141] [2019-11-28 16:57:46,760 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:48,439 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 16:57:48,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:48,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 16:57:48,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:48,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:48,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 16:57:48,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639948862] [2019-11-28 16:57:48,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 16:57:48,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 16:57:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 16:57:48,467 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-28 16:57:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:48,526 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-28 16:57:48,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 16:57:48,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-28 16:57:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:48,530 INFO L225 Difference]: With dead ends: 36 [2019-11-28 16:57:48,530 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 16:57:48,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 16:57:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 16:57:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-28 16:57:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 16:57:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 16:57:48,541 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-28 16:57:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:48,541 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 16:57:48,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 16:57:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 16:57:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 16:57:48,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:48,544 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:48,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:48,752 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2019-11-28 16:57:48,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:48,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108359734] [2019-11-28 16:57:48,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:48,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108359734] [2019-11-28 16:57:48,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344480701] [2019-11-28 16:57:48,856 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:57:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:48,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 16:57:48,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:48,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:48,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 16:57:48,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192787921] [2019-11-28 16:57:48,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 16:57:48,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 16:57:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 16:57:48,955 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-28 16:57:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:49,045 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-28 16:57:49,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 16:57:49,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-28 16:57:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:49,050 INFO L225 Difference]: With dead ends: 38 [2019-11-28 16:57:49,050 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 16:57:49,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 16:57:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 16:57:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-28 16:57:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 16:57:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-28 16:57:49,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-28 16:57:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:49,061 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-28 16:57:49,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 16:57:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-28 16:57:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 16:57:49,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:49,063 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:49,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:49,269 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2019-11-28 16:57:49,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:49,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759399797] [2019-11-28 16:57:49,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:49,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759399797] [2019-11-28 16:57:49,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491303747] [2019-11-28 16:57:49,406 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 [2019-11-28 16:57:49,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 16:57:49,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:49,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 16:57:49,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:49,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:49,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 16:57:49,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078490526] [2019-11-28 16:57:49,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 16:57:49,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 16:57:49,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-28 16:57:49,525 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-28 16:57:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:49,590 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-28 16:57:49,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 16:57:49,591 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-28 16:57:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:49,592 INFO L225 Difference]: With dead ends: 40 [2019-11-28 16:57:49,592 INFO L226 Difference]: Without dead ends: 31 [2019-11-28 16:57:49,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-28 16:57:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-28 16:57:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-28 16:57:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 16:57:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-28 16:57:49,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-28 16:57:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:49,609 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-28 16:57:49,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 16:57:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-28 16:57:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-28 16:57:49,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:49,611 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:49,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:49,823 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2019-11-28 16:57:49,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:49,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546847708] [2019-11-28 16:57:49,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:49,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546847708] [2019-11-28 16:57:49,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032413742] [2019-11-28 16:57:49,944 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 [2019-11-28 16:58:03,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 16:58:03,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:58:03,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 16:58:03,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:58:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:58:03,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:58:03,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 16:58:03,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154366790] [2019-11-28 16:58:03,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 16:58:03,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:58:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 16:58:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-28 16:58:03,592 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-28 16:58:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:03,680 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-28 16:58:03,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 16:58:03,680 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-28 16:58:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:03,681 INFO L225 Difference]: With dead ends: 41 [2019-11-28 16:58:03,681 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 16:58:03,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-28 16:58:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 16:58:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 16:58:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 16:58:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 16:58:03,686 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-28 16:58:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:03,686 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 16:58:03,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 16:58:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 16:58:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-28 16:58:03,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:03,688 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:58:03,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:58:03,888 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2019-11-28 16:58:03,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:03,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185742618] [2019-11-28 16:58:03,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:58:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:58:04,253 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:58:04,254 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:58:04,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:58:04 BoogieIcfgContainer [2019-11-28 16:58:04,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:58:04,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:58:04,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:58:04,337 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:58:04,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:42" (3/4) ... [2019-11-28 16:58:04,340 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:58:04,465 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:58:04,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:58:04,468 INFO L168 Benchmark]: Toolchain (without parser) took 22671.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.7 MB). Free memory was 953.7 MB in the beginning and 1.0 GB in the end (delta: -93.6 MB). Peak memory consumption was 116.2 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:04,469 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:04,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -189.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:04,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.67 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 16:58:04,475 INFO L168 Benchmark]: Boogie Preprocessor took 31.39 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 16:58:04,476 INFO L168 Benchmark]: RCFGBuilder took 422.64 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:04,477 INFO L168 Benchmark]: TraceAbstraction took 21708.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 51.1 MB). Peak memory consumption was 114.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:04,477 INFO L168 Benchmark]: Witness Printer took 129.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:04,485 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 314.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -189.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 58.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 422.64 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21708.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 51.1 MB). Peak memory consumption was 114.6 MB. Max. memory is 11.5 GB. * Witness Printer took 129.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy dummy; [L23] struct dummy *dummies[10]; [L24] int a[10]; [L25] int i, *pa; [L26] i = __VERIFIER_nondet_int() [L27] int j = 0; [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND FALSE !(j < 10) [L34] COND TRUE i >= 0 && i < 9 [L35] a[i] = i [L36] dummy.array = &a[i] [L37] dummies[i + 1] = &dummy [L38] cont.array = &dummies[0] [L39] EXPR cont.array [L39] EXPR cont.array[i] [L39] EXPR cont.array[i]->array [L39] pa = &cont.array[i]->array[i] [L40] EXPR a[i] [L40] COND TRUE a[i] > 0 [L41] EXPR dummies[i + 1] [L41] EXPR dummies[i + 1]->array [L41] EXPR dummies[i + 1]->array[i] [L41] i = dummies[i + 1]->array[i] - 10 [L42] EXPR \read(*pa) [L42] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[i] [L16] EXPR pc->array[i]->array [L16] EXPR pc->array[i]->array[i] [L16] return pc->array[i]->array[i] == i; [L45] COND TRUE !check(&cont, i) [L53] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 21.5s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 55 SDslu, 520 SDs, 0 SdLazy, 189 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=11, 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, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 16.9s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 16761 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1197 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 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...