./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann01-2.c --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/recursive/Ackermann01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cce1369ae77ba12caf55c599bb062630d3f3fd2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:45:26,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:45:26,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:45:26,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:45:26,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:45:26,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:45:26,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:45:26,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:45:26,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:45:26,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:45:26,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:45:26,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:45:26,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:45:26,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:45:26,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:45:26,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:45:26,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:45:26,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:45:26,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:45:26,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:45:26,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:45:26,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:45:26,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:45:26,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:45:26,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:45:26,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:45:26,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:45:26,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:45:26,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:45:26,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:45:26,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:45:26,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:45:26,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:45:26,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:45:26,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:45:26,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:45:26,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:45:26,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:45:26,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:45:26,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:45:26,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:45:26,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:45:26,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:45:26,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:45:26,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:45:26,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:45:26,643 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:45:26,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:45:26,644 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:45:26,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:45:26,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:45:26,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:45:26,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:45:26,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:45:26,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:45:26,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:45:26,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:45:26,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:45:26,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:45:26,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:45:26,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:45:26,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:45:26,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:45:26,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:45:26,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:45:26,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:45:26,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:45:26,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:45:26,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:45:26,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:45:26,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:45:26,650 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 -> 7cce1369ae77ba12caf55c599bb062630d3f3fd2 [2020-10-20 01:45:26,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:45:26,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:45:26,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:45:26,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:45:26,913 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:45:26,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann01-2.c [2020-10-20 01:45:26,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8bf6fab/381255ceb0f243dc829d1f2cef3cec36/FLAGffdfe4479 [2020-10-20 01:45:27,531 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:45:27,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c [2020-10-20 01:45:27,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8bf6fab/381255ceb0f243dc829d1f2cef3cec36/FLAGffdfe4479 [2020-10-20 01:45:27,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8bf6fab/381255ceb0f243dc829d1f2cef3cec36 [2020-10-20 01:45:27,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:45:27,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:45:27,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:45:27,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:45:27,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:45:27,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:45:27" (1/1) ... [2020-10-20 01:45:27,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e670470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:27, skipping insertion in model container [2020-10-20 01:45:27,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:45:27" (1/1) ... [2020-10-20 01:45:27,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:45:27,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:45:28,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:45:28,124 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:45:28,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:45:28,155 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:45:28,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28 WrapperNode [2020-10-20 01:45:28,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:45:28,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:45:28,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:45:28,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:45:28,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:45:28,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:45:28,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:45:28,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:45:28,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (1/1) ... [2020-10-20 01:45:28,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:45:28,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:45:28,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:45:28,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:45:28,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (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 01:45:28,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:45:28,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:45:28,277 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-10-20 01:45:28,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-10-20 01:45:28,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:45:28,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:45:28,522 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:45:28,522 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:45:28,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:28 BoogieIcfgContainer [2020-10-20 01:45:28,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:45:28,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:45:28,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:45:28,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:45:28,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:45:27" (1/3) ... [2020-10-20 01:45:28,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8657f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:45:28, skipping insertion in model container [2020-10-20 01:45:28,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:28" (2/3) ... [2020-10-20 01:45:28,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8657f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:45:28, skipping insertion in model container [2020-10-20 01:45:28,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:28" (3/3) ... [2020-10-20 01:45:28,534 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-10-20 01:45:28,548 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:45:28,556 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:45:28,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:45:28,611 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:45:28,612 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:45:28,612 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:45:28,613 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:45:28,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:45:28,614 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:45:28,614 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:45:28,614 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:45:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-20 01:45:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 01:45:28,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:28,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:28,648 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1799437593, now seen corresponding path program 1 times [2020-10-20 01:45:28,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:28,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799249462] [2020-10-20 01:45:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:28,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:28,973 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 01:45:28,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799249462] [2020-10-20 01:45:28,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:45:28,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 01:45:28,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099757576] [2020-10-20 01:45:28,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:45:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:45:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:45:28,997 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-10-20 01:45:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:29,173 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-20 01:45:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:45:29,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-20 01:45:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:29,186 INFO L225 Difference]: With dead ends: 39 [2020-10-20 01:45:29,186 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 01:45:29,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:45:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 01:45:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-20 01:45:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 01:45:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-20 01:45:29,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2020-10-20 01:45:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:29,239 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-20 01:45:29,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:45:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-20 01:45:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 01:45:29,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:29,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:29,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:45:29,243 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash 335222435, now seen corresponding path program 1 times [2020-10-20 01:45:29,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:29,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129622249] [2020-10-20 01:45:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:45:29,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129622249] [2020-10-20 01:45:29,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:45:29,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-20 01:45:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756524203] [2020-10-20 01:45:29,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:45:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:29,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:45:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:45:29,467 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2020-10-20 01:45:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:29,640 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-10-20 01:45:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:45:29,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 01:45:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:29,643 INFO L225 Difference]: With dead ends: 29 [2020-10-20 01:45:29,643 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 01:45:29,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:45:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 01:45:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-20 01:45:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 01:45:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-10-20 01:45:29,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 19 [2020-10-20 01:45:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:29,655 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-10-20 01:45:29,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:45:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-10-20 01:45:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 01:45:29,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:29,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:29,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:45:29,658 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash 850378260, now seen corresponding path program 1 times [2020-10-20 01:45:29,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:29,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101068286] [2020-10-20 01:45:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:45:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 01:45:29,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101068286] [2020-10-20 01:45:29,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930622972] [2020-10-20 01:45:29,741 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 01:45:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:45:29,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:45:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 01:45:29,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:45:29,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-10-20 01:45:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112863655] [2020-10-20 01:45:29,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:45:29,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:45:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:45:29,924 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 10 states. [2020-10-20 01:45:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:30,086 INFO L93 Difference]: Finished difference Result 48 states and 75 transitions. [2020-10-20 01:45:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:45:30,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-20 01:45:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:30,089 INFO L225 Difference]: With dead ends: 48 [2020-10-20 01:45:30,089 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 01:45:30,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:45:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 01:45:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-10-20 01:45:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 01:45:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-10-20 01:45:30,100 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2020-10-20 01:45:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:30,100 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-10-20 01:45:30,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:45:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-10-20 01:45:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 01:45:30,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:30,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:30,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:45:30,318 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1209780356, now seen corresponding path program 1 times [2020-10-20 01:45:30,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:30,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283106548] [2020-10-20 01:45:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:30,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:30,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:30,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-20 01:45:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-20 01:45:30,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283106548] [2020-10-20 01:45:30,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206121516] [2020-10-20 01:45:30,562 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 01:45:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 01:45:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:45:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 01:45:30,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:45:30,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2020-10-20 01:45:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360831807] [2020-10-20 01:45:30,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:45:30,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:45:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:45:30,696 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 14 states. [2020-10-20 01:45:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:31,202 INFO L93 Difference]: Finished difference Result 51 states and 84 transitions. [2020-10-20 01:45:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 01:45:31,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-20 01:45:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:31,207 INFO L225 Difference]: With dead ends: 51 [2020-10-20 01:45:31,207 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 01:45:31,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-20 01:45:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 01:45:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-10-20 01:45:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-20 01:45:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2020-10-20 01:45:31,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 32 [2020-10-20 01:45:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:31,225 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2020-10-20 01:45:31,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:45:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2020-10-20 01:45:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-20 01:45:31,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:31,228 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:31,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:45:31,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash -720833458, now seen corresponding path program 2 times [2020-10-20 01:45:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:31,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001626232] [2020-10-20 01:45:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:31,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:31,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:31,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:31,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-20 01:45:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 01:45:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001626232] [2020-10-20 01:45:31,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676211735] [2020-10-20 01:45:31,557 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 01:45:31,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:45:31,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:45:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 01:45:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:45:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 01:45:31,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:45:31,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-10-20 01:45:31,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125245708] [2020-10-20 01:45:31,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:45:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:45:31,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:45:31,702 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand 13 states. [2020-10-20 01:45:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:32,075 INFO L93 Difference]: Finished difference Result 78 states and 155 transitions. [2020-10-20 01:45:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:45:32,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-20 01:45:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:32,078 INFO L225 Difference]: With dead ends: 78 [2020-10-20 01:45:32,078 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 01:45:32,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-20 01:45:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 01:45:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-20 01:45:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 01:45:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 74 transitions. [2020-10-20 01:45:32,093 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 74 transitions. Word has length 39 [2020-10-20 01:45:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:32,094 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 74 transitions. [2020-10-20 01:45:32,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:45:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 74 transitions. [2020-10-20 01:45:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-20 01:45:32,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:32,096 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:32,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:45:32,312 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1845686382, now seen corresponding path program 3 times [2020-10-20 01:45:32,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:32,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317661099] [2020-10-20 01:45:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:32,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:32,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:32,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-20 01:45:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-20 01:45:32,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317661099] [2020-10-20 01:45:32,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571811699] [2020-10-20 01:45:32,548 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 01:45:32,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 01:45:32,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:45:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 01:45:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:45:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-20 01:45:32,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:45:32,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2020-10-20 01:45:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118884256] [2020-10-20 01:45:32,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 01:45:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 01:45:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:45:32,664 INFO L87 Difference]: Start difference. First operand 47 states and 74 transitions. Second operand 15 states. [2020-10-20 01:45:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:33,168 INFO L93 Difference]: Finished difference Result 94 states and 191 transitions. [2020-10-20 01:45:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 01:45:33,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-20 01:45:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:33,172 INFO L225 Difference]: With dead ends: 94 [2020-10-20 01:45:33,172 INFO L226 Difference]: Without dead ends: 90 [2020-10-20 01:45:33,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-20 01:45:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-20 01:45:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2020-10-20 01:45:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 01:45:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2020-10-20 01:45:33,195 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 39 [2020-10-20 01:45:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:33,195 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2020-10-20 01:45:33,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 01:45:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2020-10-20 01:45:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-20 01:45:33,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:33,198 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:33,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:45:33,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1271175911, now seen corresponding path program 4 times [2020-10-20 01:45:33,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:33,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178778953] [2020-10-20 01:45:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 01:45:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-20 01:45:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-20 01:45:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:45:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 01:45:33,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178778953] [2020-10-20 01:45:33,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428675946] [2020-10-20 01:45:33,669 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:45:33,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:45:33,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:45:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:45:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:45:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-20 01:45:33,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:45:33,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2020-10-20 01:45:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891052023] [2020-10-20 01:45:33,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 01:45:33,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:33,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 01:45:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-20 01:45:33,824 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand 20 states. [2020-10-20 01:45:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:34,499 INFO L93 Difference]: Finished difference Result 92 states and 181 transitions. [2020-10-20 01:45:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 01:45:34,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-20 01:45:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:34,503 INFO L225 Difference]: With dead ends: 92 [2020-10-20 01:45:34,503 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:45:34,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2020-10-20 01:45:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:45:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:45:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:45:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:45:34,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2020-10-20 01:45:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:34,507 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:45:34,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 01:45:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:45:34,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:45:34,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 01:45:34,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:45:35,210 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-10-20 01:45:35,308 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:45:35,309 INFO L274 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-10-20 01:45:35,309 INFO L270 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2020-10-20 01:45:35,309 INFO L274 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-10-20 01:45:35,309 INFO L274 CegarLoopResult]: For program point L36(lines 36 41) no Hoare annotation was computed. [2020-10-20 01:45:35,309 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 01:45:35,310 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:45:35,310 INFO L274 CegarLoopResult]: For program point L30(lines 30 34) no Hoare annotation was computed. [2020-10-20 01:45:35,310 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:45:35,316 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:45:35,317 INFO L277 CegarLoopResult]: At program point L28(lines 28 48) the Hoare annotation is: true [2020-10-20 01:45:35,317 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 01:45:35,317 INFO L274 CegarLoopResult]: For program point L43(lines 43 47) no Hoare annotation was computed. [2020-10-20 01:45:35,317 INFO L274 CegarLoopResult]: For program point ackermannEXIT(lines 17 25) no Hoare annotation was computed. [2020-10-20 01:45:35,319 INFO L270 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-10-20 01:45:35,319 INFO L274 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-10-20 01:45:35,319 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-10-20 01:45:35,320 INFO L270 CegarLoopResult]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|)) (.cse1 (= ackermann_~n |ackermann_#in~n|))) (or (and (<= 2 |ackermann_#t~ret8|) (<= ackermann_~m 1) .cse1 .cse2 .cse3) (and .cse0 .cse2 .cse3 .cse1))))) [2020-10-20 01:45:35,320 INFO L277 CegarLoopResult]: At program point ackermannENTRY(lines 17 25) the Hoare annotation is: true [2020-10-20 01:45:35,320 INFO L274 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-10-20 01:45:35,321 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-20 01:45:35,321 INFO L274 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-10-20 01:45:35,321 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-20 01:45:35,322 INFO L274 CegarLoopResult]: For program point ackermannFINAL(lines 17 25) no Hoare annotation was computed. [2020-10-20 01:45:35,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:45:35 BoogieIcfgContainer [2020-10-20 01:45:35,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:45:35,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:45:35,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:45:35,336 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:45:35,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:28" (3/4) ... [2020-10-20 01:45:35,340 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:45:35,354 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2020-10-20 01:45:35,362 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 01:45:35,362 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-20 01:45:35,363 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:45:35,363 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:45:35,438 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:45:35,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:45:35,441 INFO L168 Benchmark]: Toolchain (without parser) took 7611.93 ms. Allocated memory was 41.9 MB in the beginning and 72.4 MB in the end (delta: 30.4 MB). Free memory was 21.9 MB in the beginning and 33.2 MB in the end (delta: -11.3 MB). Peak memory consumption was 19.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,441 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 32.0 MB. Free memory was 9.8 MB in the beginning and 9.7 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.74 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.1 MB in the beginning and 23.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.31 ms. Allocated memory is still 42.5 MB. Free memory was 23.0 MB in the beginning and 21.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,446 INFO L168 Benchmark]: Boogie Preprocessor took 18.76 ms. Allocated memory is still 42.5 MB. Free memory was 21.2 MB in the beginning and 20.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,447 INFO L168 Benchmark]: RCFGBuilder took 313.41 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 20.0 MB in the beginning and 23.6 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,447 INFO L168 Benchmark]: TraceAbstraction took 6808.68 ms. Allocated memory was 44.0 MB in the beginning and 72.4 MB in the end (delta: 28.3 MB). Free memory was 23.1 MB in the beginning and 37.0 MB in the end (delta: -13.9 MB). Peak memory consumption was 43.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,449 INFO L168 Benchmark]: Witness Printer took 103.28 ms. Allocated memory is still 72.4 MB. Free memory was 37.0 MB in the beginning and 33.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:35,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 32.0 MB. Free memory was 9.8 MB in the beginning and 9.7 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 321.74 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.1 MB in the beginning and 23.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.31 ms. Allocated memory is still 42.5 MB. Free memory was 23.0 MB in the beginning and 21.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 18.76 ms. Allocated memory is still 42.5 MB. Free memory was 21.2 MB in the beginning and 20.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 313.41 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 20.0 MB in the beginning and 23.6 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 6808.68 ms. Allocated memory was 44.0 MB in the beginning and 72.4 MB in the end (delta: 28.3 MB). Free memory was 23.1 MB in the beginning and 37.0 MB in the end (delta: -13.9 MB). Peak memory consumption was 43.2 MB. Max. memory is 14.3 GB. * Witness Printer took 103.28 ms. Allocated memory is still 72.4 MB. Free memory was 37.0 MB in the beginning and 33.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 220 SDslu, 648 SDs, 0 SdLazy, 1477 SolverSat, 358 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 381 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 67 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 98 PreInvPairs, 131 NumberOfFragments, 77 HoareAnnotationTreeSize, 98 FomulaSimplifications, 11396 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 6 FomulaSimplificationsInter, 507 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 419 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 407 ConstructedInterpolants, 0 QuantifiedInterpolants, 32497 SizeOfPredicates, 16 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 431/522 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 correct! Received shutdown request...