./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01-1.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/sum01-1.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 7bde49acbd83d331d6c1a7f9b5b50ee14f089f95 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 00:55:30,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:30,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:30,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:30,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:30,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:30,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:30,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:30,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:30,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:30,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:30,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:30,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:30,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:30,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:30,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:30,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:30,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:30,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:30,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:30,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:30,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:30,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:30,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:30,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:30,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:30,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:30,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:30,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:30,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:30,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:30,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:30,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:30,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:30,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:30,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:30,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:30,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:30,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:30,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:30,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:30,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:30,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:30,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:30,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:30,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:30,619 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:30,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:30,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:30,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:30,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:30,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:30,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:30,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:30,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:30,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:30,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:30,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:30,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:30,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:30,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:30,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:30,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:30,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:30,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:30,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:30,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:30,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:30,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:30,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:30,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:30,625 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 -> 7bde49acbd83d331d6c1a7f9b5b50ee14f089f95 [2020-10-20 00:55:30,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:30,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:30,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:30,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:30,845 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:30,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01-1.i [2020-10-20 00:55:30,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32c0c42bb/9858cb112a9245c8b6affa1c856a8011/FLAG10b638e81 [2020-10-20 00:55:31,358 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:31,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i [2020-10-20 00:55:31,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32c0c42bb/9858cb112a9245c8b6affa1c856a8011/FLAG10b638e81 [2020-10-20 00:55:31,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32c0c42bb/9858cb112a9245c8b6affa1c856a8011 [2020-10-20 00:55:31,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:31,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:31,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:31,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:31,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:31,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:31" (1/1) ... [2020-10-20 00:55:31,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c78070d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:31, skipping insertion in model container [2020-10-20 00:55:31,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:31" (1/1) ... [2020-10-20 00:55:31,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:31,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:32,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:32,055 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:32,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:32,089 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:32,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32 WrapperNode [2020-10-20 00:55:32,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:32,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:32,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:32,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:32,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:32,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:32,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:32,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:32,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (1/1) ... [2020-10-20 00:55:32,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:32,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:32,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:32,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:32,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (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 00:55:32,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:32,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:32,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:32,443 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:32,443 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:32,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:32 BoogieIcfgContainer [2020-10-20 00:55:32,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:32,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:32,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:32,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:32,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:31" (1/3) ... [2020-10-20 00:55:32,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e933268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:32, skipping insertion in model container [2020-10-20 00:55:32,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:32" (2/3) ... [2020-10-20 00:55:32,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e933268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:32, skipping insertion in model container [2020-10-20 00:55:32,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:32" (3/3) ... [2020-10-20 00:55:32,455 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-10-20 00:55:32,466 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:32,473 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:32,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:32,503 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:32,503 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:32,504 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:32,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:32,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:32,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:32,504 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:32,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:55:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:32,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:32,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:32,523 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash 531641672, now seen corresponding path program 1 times [2020-10-20 00:55:32,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:32,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251053163] [2020-10-20 00:55:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:32,662 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 00:55:32,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251053163] [2020-10-20 00:55:32,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:32,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:55:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290250444] [2020-10-20 00:55:32,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:32,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:32,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:32,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:32,684 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:55:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:32,702 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-10-20 00:55:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:32,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:55:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:32,713 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:55:32,714 INFO L226 Difference]: Without dead ends: 11 [2020-10-20 00:55:32,717 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 00:55:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-20 00:55:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 00:55:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 00:55:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-20 00:55:32,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-10-20 00:55:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:32,763 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-20 00:55:32,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-20 00:55:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:32,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:32,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:32,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:32,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash 216721011, now seen corresponding path program 1 times [2020-10-20 00:55:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:32,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620936261] [2020-10-20 00:55:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:32,850 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 00:55:32,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620936261] [2020-10-20 00:55:32,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:32,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:55:32,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910844905] [2020-10-20 00:55:32,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:32,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:32,856 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2020-10-20 00:55:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:32,887 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-10-20 00:55:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:32,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 00:55:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:32,890 INFO L225 Difference]: With dead ends: 20 [2020-10-20 00:55:32,891 INFO L226 Difference]: Without dead ends: 14 [2020-10-20 00:55:32,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-20 00:55:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-20 00:55:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:55:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-20 00:55:32,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-10-20 00:55:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:32,901 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-20 00:55:32,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:32,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-20 00:55:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:55:32,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:32,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:32,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:55:32,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1820060357, now seen corresponding path program 1 times [2020-10-20 00:55:32,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:32,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049115299] [2020-10-20 00:55:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:33,199 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 00:55:33,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049115299] [2020-10-20 00:55:33,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971413193] [2020-10-20 00:55:33,200 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 00:55:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 00:55:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:33,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:33,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:33,431 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 00:55:33,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:33,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-20 00:55:33,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770487663] [2020-10-20 00:55:33,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:55:33,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:33,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:55:33,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:33,434 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2020-10-20 00:55:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:33,548 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-20 00:55:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:55:33,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-10-20 00:55:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:33,550 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:55:33,550 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:55:33,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:55:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:55:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-20 00:55:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:55:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:55:33,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-20 00:55:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:33,556 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:55:33,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:55:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:55:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:55:33,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:33,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:33,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:55:33,769 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash -275836557, now seen corresponding path program 2 times [2020-10-20 00:55:33,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:33,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302806211] [2020-10-20 00:55:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302806211] [2020-10-20 00:55:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418608561] [2020-10-20 00:55:34,010 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 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 00:55:34,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:34,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:34,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:55:34,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:34,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:34,215 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-20 00:55:34,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:34,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:34,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:34,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:34,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-20 00:55:34,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036074952] [2020-10-20 00:55:34,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:55:34,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:55:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:55:34,264 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 16 states. [2020-10-20 00:55:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:34,643 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-20 00:55:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 00:55:34,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-20 00:55:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:34,644 INFO L225 Difference]: With dead ends: 36 [2020-10-20 00:55:34,644 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:55:34,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-20 00:55:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:55:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-20 00:55:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:55:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-20 00:55:34,655 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-10-20 00:55:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:34,655 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-20 00:55:34,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:55:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-20 00:55:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:55:34,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:34,659 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:34,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:34,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash -215548813, now seen corresponding path program 3 times [2020-10-20 00:55:34,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:34,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983500850] [2020-10-20 00:55:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 00:55:35,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983500850] [2020-10-20 00:55:35,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003064020] [2020-10-20 00:55:35,162 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 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 00:55:35,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 00:55:35,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 00:55:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:35,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:35,411 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-20 00:55:35,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:35,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:35,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:35,443 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 00:55:35,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:35,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-10-20 00:55:35,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092698363] [2020-10-20 00:55:35,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 00:55:35,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 00:55:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-20 00:55:35,446 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2020-10-20 00:55:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:36,103 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-20 00:55:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 00:55:36,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2020-10-20 00:55:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:36,104 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:55:36,104 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:55:36,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-10-20 00:55:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:55:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-20 00:55:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:55:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-20 00:55:36,112 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-10-20 00:55:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:36,112 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-20 00:55:36,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 00:55:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-20 00:55:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 00:55:36,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:36,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:36,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:36,328 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash -777715407, now seen corresponding path program 1 times [2020-10-20 00:55:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:36,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965170014] [2020-10-20 00:55:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:36,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965170014] [2020-10-20 00:55:36,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423873813] [2020-10-20 00:55:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:55:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:36,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:36,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 00:55:36,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962344529] [2020-10-20 00:55:36,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:55:36,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:36,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:55:36,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:55:36,502 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-20 00:55:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:36,545 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-20 00:55:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:55:36,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-20 00:55:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:36,546 INFO L225 Difference]: With dead ends: 41 [2020-10-20 00:55:36,547 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 00:55:36,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:55:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 00:55:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-20 00:55:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:55:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-20 00:55:36,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-20 00:55:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:36,554 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-20 00:55:36,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:55:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-20 00:55:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 00:55:36,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:36,555 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:36,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:36,757 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:36,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1901392391, now seen corresponding path program 2 times [2020-10-20 00:55:36,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:36,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654902702] [2020-10-20 00:55:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:36,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654902702] [2020-10-20 00:55:36,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288088169] [2020-10-20 00:55:36,830 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 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 [2020-10-20 00:55:36,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:36,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:55:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:36,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:36,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 00:55:36,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478182125] [2020-10-20 00:55:36,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:55:36,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:55:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:36,901 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-20 00:55:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:36,952 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-20 00:55:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:55:36,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-20 00:55:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:36,954 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:55:36,954 INFO L226 Difference]: Without dead ends: 35 [2020-10-20 00:55:36,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 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 00:55:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-20 00:55:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-20 00:55:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 00:55:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-20 00:55:36,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-20 00:55:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:36,966 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-20 00:55:36,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:55:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-20 00:55:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 00:55:36,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:36,969 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:37,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 00:55:37,170 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1907649585, now seen corresponding path program 3 times [2020-10-20 00:55:37,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:37,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372878202] [2020-10-20 00:55:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372878202] [2020-10-20 00:55:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066141292] [2020-10-20 00:55:37,250 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 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 00:55:37,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-20 00:55:37,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:55:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:37,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:37,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 00:55:37,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008532117] [2020-10-20 00:55:37,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:55:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:55:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:55:37,343 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2020-10-20 00:55:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:37,385 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-20 00:55:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 00:55:37,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-20 00:55:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:37,386 INFO L225 Difference]: With dead ends: 47 [2020-10-20 00:55:37,386 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:55:37,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:55:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:55:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-20 00:55:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 00:55:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-20 00:55:37,392 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-20 00:55:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:37,392 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-20 00:55:37,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:55:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-20 00:55:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:55:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:37,394 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:37,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:37,595 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash -253771015, now seen corresponding path program 4 times [2020-10-20 00:55:37,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:37,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835191242] [2020-10-20 00:55:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:37,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835191242] [2020-10-20 00:55:37,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675897970] [2020-10-20 00:55:37,695 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 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 [2020-10-20 00:55:37,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:55:37,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:55:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:37,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:37,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 00:55:37,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936326361] [2020-10-20 00:55:37,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:55:37,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:37,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:55:37,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:37,770 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 12 states. [2020-10-20 00:55:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:37,816 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-20 00:55:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:55:37,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-20 00:55:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:37,817 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:55:37,817 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 00:55:37,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 00:55:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-20 00:55:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 00:55:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-20 00:55:37,823 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2020-10-20 00:55:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:37,823 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-20 00:55:37,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:55:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-20 00:55:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-20 00:55:37,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:37,824 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:38,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:38,035 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash -985163983, now seen corresponding path program 5 times [2020-10-20 00:55:38,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:38,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591634475] [2020-10-20 00:55:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:38,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:38,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:38,104 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:55:38,105 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:55:38,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 00:55:38,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:38 BoogieIcfgContainer [2020-10-20 00:55:38,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:38,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:38,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:38,147 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:38,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:32" (3/4) ... [2020-10-20 00:55:38,150 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:55:38,212 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:38,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:38,215 INFO L168 Benchmark]: Toolchain (without parser) took 6456.34 ms. Allocated memory was 35.1 MB in the beginning and 69.2 MB in the end (delta: 34.1 MB). Free memory was 7.0 MB in the beginning and 12.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 28.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,216 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 35.1 MB. Free memory was 12.2 MB in the beginning and 12.1 MB in the end (delta: 52.4 kB). Peak memory consumption was 52.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.05 ms. Allocated memory was 35.1 MB in the beginning and 46.1 MB in the end (delta: 11.0 MB). Free memory was 6.2 MB in the beginning and 28.4 MB in the end (delta: -22.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.75 ms. Allocated memory is still 46.1 MB. Free memory was 28.2 MB in the beginning and 26.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,218 INFO L168 Benchmark]: Boogie Preprocessor took 20.52 ms. Allocated memory is still 46.1 MB. Free memory was 26.6 MB in the beginning and 25.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,219 INFO L168 Benchmark]: RCFGBuilder took 297.56 ms. Allocated memory was 46.1 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Free memory was 25.4 MB in the beginning and 27.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,220 INFO L168 Benchmark]: TraceAbstraction took 5699.46 ms. Allocated memory was 48.2 MB in the beginning and 69.2 MB in the end (delta: 21.0 MB). Free memory was 26.8 MB in the beginning and 16.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 31.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,220 INFO L168 Benchmark]: Witness Printer took 66.04 ms. Allocated memory is still 69.2 MB. Free memory was 16.1 MB in the beginning and 12.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:38,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 35.1 MB. Free memory was 12.2 MB in the beginning and 12.1 MB in the end (delta: 52.4 kB). Peak memory consumption was 52.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 323.05 ms. Allocated memory was 35.1 MB in the beginning and 46.1 MB in the end (delta: 11.0 MB). Free memory was 6.2 MB in the beginning and 28.4 MB in the end (delta: -22.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.75 ms. Allocated memory is still 46.1 MB. Free memory was 28.2 MB in the beginning and 26.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 20.52 ms. Allocated memory is still 46.1 MB. Free memory was 26.6 MB in the beginning and 25.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 297.56 ms. Allocated memory was 46.1 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Free memory was 25.4 MB in the beginning and 27.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5699.46 ms. Allocated memory was 48.2 MB in the beginning and 69.2 MB in the end (delta: 21.0 MB). Free memory was 26.8 MB in the beginning and 16.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 31.6 MB. Max. memory is 14.3 GB. * Witness Printer took 66.04 ms. Allocated memory is still 69.2 MB. Free memory was 16.1 MB in the beginning and 12.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 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, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND FALSE !(i<10) [L24] i++ [L24] COND FALSE !(i<=n) [L15] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01-1.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: 5.6s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 74 SDslu, 273 SDs, 0 SdLazy, 589 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 265 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 7 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 388 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 334 ConstructedInterpolants, 0 QuantifiedInterpolants, 28251 SizeOfPredicates, 19 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 117/716 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...