./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum04-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/loops/sum04-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 00:55:44,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:44,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:44,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:44,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:44,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:44,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:44,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:44,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:44,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:44,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:44,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:44,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:44,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:44,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:44,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:44,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:44,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:44,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:44,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:44,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:44,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:44,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:44,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:44,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:44,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:44,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:44,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:44,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:44,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:44,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:44,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:44,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:44,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:44,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:44,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:44,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:44,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:44,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:44,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:44,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:44,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:44,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:44,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:44,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:44,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:44,590 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:44,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:44,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:44,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:44,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:44,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:44,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:44,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:44,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:44,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:44,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:44,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:44,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:44,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:44,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:44,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:44,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:44,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:44,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:44,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:44,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:44,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:44,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:44,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:44,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:44,598 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(reach_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 -> a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 [2020-10-20 00:55:44,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:44,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:44,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:44,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:44,824 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:44,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-1.i [2020-10-20 00:55:44,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e082eb7/cc50393abf8e484fb3a5089eac52d9e0/FLAG2c0fe078b [2020-10-20 00:55:45,345 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:45,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum04-1.i [2020-10-20 00:55:45,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e082eb7/cc50393abf8e484fb3a5089eac52d9e0/FLAG2c0fe078b [2020-10-20 00:55:45,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99e082eb7/cc50393abf8e484fb3a5089eac52d9e0 [2020-10-20 00:55:45,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:45,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:45,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:45,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:45,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:45,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:45" (1/1) ... [2020-10-20 00:55:45,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692c6187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:45, skipping insertion in model container [2020-10-20 00:55:45,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:45" (1/1) ... [2020-10-20 00:55:45,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:45,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:46,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:46,085 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:46,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:46,113 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:46,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46 WrapperNode [2020-10-20 00:55:46,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:46,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:46,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:46,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:46,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:46,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:46,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:46,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:46,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (1/1) ... [2020-10-20 00:55:46,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:46,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:46,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:46,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:46,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (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 [2020-10-20 00:55:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:46,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:46,410 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:46,411 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:46,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:46 BoogieIcfgContainer [2020-10-20 00:55:46,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:46,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:46,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:46,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:46,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:45" (1/3) ... [2020-10-20 00:55:46,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cac04e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:46, skipping insertion in model container [2020-10-20 00:55:46,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:46" (2/3) ... [2020-10-20 00:55:46,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cac04e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:46, skipping insertion in model container [2020-10-20 00:55:46,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:46" (3/3) ... [2020-10-20 00:55:46,422 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-20 00:55:46,434 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:46,440 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:46,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:46,477 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:46,478 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:46,478 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:46,478 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:46,478 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:46,479 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:46,479 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:46,479 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:55:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:46,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:46,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:46,499 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 531641672, now seen corresponding path program 1 times [2020-10-20 00:55:46,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:46,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980330681] [2020-10-20 00:55:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:46,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980330681] [2020-10-20 00:55:46,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:46,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:55:46,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001346350] [2020-10-20 00:55:46,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:46,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:46,641 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:55:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:46,656 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-10-20 00:55:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:46,658 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:55:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:46,667 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:55:46,667 INFO L226 Difference]: Without dead ends: 11 [2020-10-20 00:55:46,680 INFO L677 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 [2020-10-20 00:55:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-20 00:55:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 00:55:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 00:55:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-20 00:55:46,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-10-20 00:55:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:46,716 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-20 00:55:46,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-20 00:55:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:46,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:46,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:46,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:46,720 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 216721011, now seen corresponding path program 1 times [2020-10-20 00:55:46,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:46,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534942309] [2020-10-20 00:55:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:46,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534942309] [2020-10-20 00:55:46,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:46,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:55:46,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172834242] [2020-10-20 00:55:46,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:55:46,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:55:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:55:46,777 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-10-20 00:55:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:46,799 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-10-20 00:55:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:55:46,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-20 00:55:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:46,801 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:55:46,801 INFO L226 Difference]: Without dead ends: 14 [2020-10-20 00:55:46,802 INFO L677 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 [2020-10-20 00:55:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-20 00:55:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-20 00:55:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:55:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 00:55:46,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2020-10-20 00:55:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:46,806 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 00:55:46,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:55:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 00:55:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:55:46,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:46,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:46,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:55:46,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1820060357, now seen corresponding path program 1 times [2020-10-20 00:55:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:46,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649574180] [2020-10-20 00:55:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:46,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649574180] [2020-10-20 00:55:46,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245924683] [2020-10-20 00:55:46,940 INFO L95 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 [2020-10-20 00:55:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:46,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:55:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:47,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:47,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:55:47,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732161761] [2020-10-20 00:55:47,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:55:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:55:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:47,055 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-10-20 00:55:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:47,086 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-20 00:55:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:47,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 00:55:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:47,087 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:55:47,087 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 00:55:47,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 00:55:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-20 00:55:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:55:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:55:47,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-20 00:55:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:47,092 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:55:47,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:55:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:55:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:55:47,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:47,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:47,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:55:47,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -275836557, now seen corresponding path program 2 times [2020-10-20 00:55:47,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:47,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783931766] [2020-10-20 00:55:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:55:47,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783931766] [2020-10-20 00:55:47,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:47,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:55:47,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996655772] [2020-10-20 00:55:47,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:47,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:47,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:47,359 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-20 00:55:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:47,403 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-20 00:55:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:47,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:55:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:47,406 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:55:47,407 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 00:55:47,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 00:55:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-20 00:55:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 00:55:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 00:55:47,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-10-20 00:55:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:47,416 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 00:55:47,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 00:55:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:55:47,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:47,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:47,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:55:47,418 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash -508664839, now seen corresponding path program 1 times [2020-10-20 00:55:47,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:47,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505942045] [2020-10-20 00:55:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:47,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505942045] [2020-10-20 00:55:47,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684787624] [2020-10-20 00:55:47,468 INFO L95 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 [2020-10-20 00:55:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:55:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:47,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:47,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:55:47,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575004267] [2020-10-20 00:55:47,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:55:47,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:55:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:55:47,547 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-20 00:55:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:47,579 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-20 00:55:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:55:47,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-20 00:55:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:47,580 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:55:47,581 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:55:47,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:55:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:55:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-20 00:55:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:55:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-20 00:55:47,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-10-20 00:55:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:47,586 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-20 00:55:47,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:55:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-20 00:55:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:55:47,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:47,587 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:47,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:47,800 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1024895439, now seen corresponding path program 2 times [2020-10-20 00:55:47,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:47,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150642006] [2020-10-20 00:55:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:47,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150642006] [2020-10-20 00:55:47,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121615792] [2020-10-20 00:55:47,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-20 00:55:47,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:47,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:55:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:47,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:47,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 00:55:47,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452887922] [2020-10-20 00:55:47,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:55:47,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:55:47,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:47,978 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-10-20 00:55:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:48,023 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-20 00:55:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:55:48,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-20 00:55:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:48,026 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:55:48,026 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:55:48,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:55:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-20 00:55:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:55:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 00:55:48,032 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2020-10-20 00:55:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:48,032 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 00:55:48,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:55:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 00:55:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:55:48,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:48,033 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:48,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:48,247 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash 928251515, now seen corresponding path program 3 times [2020-10-20 00:55:48,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733746382] [2020-10-20 00:55:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:48,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733746382] [2020-10-20 00:55:48,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375876572] [2020-10-20 00:55:48,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-20 00:55:48,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 00:55:48,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:48,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:55:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:55:48,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:48,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-10-20 00:55:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437067800] [2020-10-20 00:55:48,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:55:48,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:55:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:48,411 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-10-20 00:55:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:48,458 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-20 00:55:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:55:48,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-20 00:55:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:48,460 INFO L225 Difference]: With dead ends: 35 [2020-10-20 00:55:48,460 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:55:48,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:55:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-20 00:55:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:55:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-20 00:55:48,465 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-10-20 00:55:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:48,466 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-20 00:55:48,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:55:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-20 00:55:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 00:55:48,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:48,467 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:48,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:48,680 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768079, now seen corresponding path program 4 times [2020-10-20 00:55:48,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:48,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091558008] [2020-10-20 00:55:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:48,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091558008] [2020-10-20 00:55:48,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151156926] [2020-10-20 00:55:48,754 INFO L93 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-20 00:55:48,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:55:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:55:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:48,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:48,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 00:55:48,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875815141] [2020-10-20 00:55:48,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:55:48,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:55:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:48,835 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-10-20 00:55:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:48,885 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-20 00:55:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:55:48,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-20 00:55:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:48,886 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:55:48,886 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 00:55:48,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 00:55:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-20 00:55:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:55:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-20 00:55:48,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2020-10-20 00:55:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:48,893 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-20 00:55:48,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:55:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-20 00:55:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 00:55:48,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:48,895 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:49,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:49,107 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 495174331, now seen corresponding path program 5 times [2020-10-20 00:55:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:49,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101854502] [2020-10-20 00:55:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:49,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101854502] [2020-10-20 00:55:49,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094074325] [2020-10-20 00:55:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:49,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-20 00:55:49,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:55:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:55:49,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:49,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2020-10-20 00:55:49,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110492593] [2020-10-20 00:55:49,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:55:49,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:55:49,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:49,275 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 10 states. [2020-10-20 00:55:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:49,324 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-20 00:55:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 00:55:49,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-20 00:55:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:49,325 INFO L225 Difference]: With dead ends: 39 [2020-10-20 00:55:49,325 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 00:55:49,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 00:55:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-20 00:55:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-20 00:55:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-20 00:55:49,331 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 29 [2020-10-20 00:55:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:49,331 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-20 00:55:49,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:55:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-20 00:55:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 00:55:49,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:49,332 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:49,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:49,546 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash -808399439, now seen corresponding path program 6 times [2020-10-20 00:55:49,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:49,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633555331] [2020-10-20 00:55:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:49,571 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:49,601 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:49,642 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:55:49,642 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:55:49,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 00:55:49,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:49 BoogieIcfgContainer [2020-10-20 00:55:49,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:49,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:49,679 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:49,679 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:49,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:46" (3/4) ... [2020-10-20 00:55:49,682 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:55:49,739 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:49,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:49,742 INFO L168 Benchmark]: Toolchain (without parser) took 3963.15 ms. Allocated memory was 35.7 MB in the beginning and 53.5 MB in the end (delta: 17.8 MB). Free memory was 9.0 MB in the beginning and 31.8 MB in the end (delta: -22.8 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:55:49,742 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 35.1 MB. Free memory was 14.0 MB in the beginning and 13.9 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.51 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 8.1 MB in the beginning and 27.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.50 ms. Allocated memory is still 44.6 MB. Free memory was 27.3 MB in the beginning and 25.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,744 INFO L168 Benchmark]: Boogie Preprocessor took 22.62 ms. Allocated memory is still 44.6 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,745 INFO L168 Benchmark]: RCFGBuilder took 246.47 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 24.5 MB in the beginning and 26.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,746 INFO L168 Benchmark]: TraceAbstraction took 3264.00 ms. Allocated memory was 46.7 MB in the beginning and 53.5 MB in the end (delta: 6.8 MB). Free memory was 25.8 MB in the beginning and 34.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,746 INFO L168 Benchmark]: Witness Printer took 60.82 ms. Allocated memory is still 53.5 MB. Free memory was 34.4 MB in the beginning and 31.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:49,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 35.1 MB. Free memory was 14.0 MB in the beginning and 13.9 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 331.51 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 8.1 MB in the beginning and 27.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 28.50 ms. Allocated memory is still 44.6 MB. Free memory was 27.3 MB in the beginning and 25.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.62 ms. Allocated memory is still 44.6 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 246.47 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 24.5 MB in the beginning and 26.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3264.00 ms. Allocated memory was 46.7 MB in the beginning and 53.5 MB in the end (delta: 6.8 MB). Free memory was 25.8 MB in the beginning and 34.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 14.3 GB. * Witness Printer took 60.82 ms. Allocated memory is still 53.5 MB. Free memory was 34.4 MB in the beginning and 31.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 73 SDslu, 180 SDs, 0 SdLazy, 175 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 314 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 12185 SizeOfPredicates, 5 NumberOfNonLiveVariables, 335 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 87/387 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...