./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.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-simple/fibo_5-2.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 063966206f80cef10873a8e49ae0985aad7f65cb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 01:47:44,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:47:44,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:47:44,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:47:44,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:47:44,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:47:44,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:47:44,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:47:44,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:47:44,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:47:44,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:47:44,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:47:44,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:47:44,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:47:44,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:47:44,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:47:44,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:47:44,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:47:44,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:47:44,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:47:44,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:47:44,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:47:44,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:47:44,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:47:44,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:47:44,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:47:44,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:47:44,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:47:44,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:47:44,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:47:44,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:47:44,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:47:44,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:47:44,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:47:44,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:47:44,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:47:44,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:47:44,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:47:44,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:47:44,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:47:44,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:47:44,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:47:44,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:47:44,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:47:44,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:47:44,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:47:44,905 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:47:44,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:47:44,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:47:44,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:47:44,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:47:44,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:47:44,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:47:44,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:47:44,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:47:44,908 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:47:44,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:47:44,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:47:44,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:47:44,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:47:44,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:47:44,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:47:44,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:47:44,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:47:44,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:47:44,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:47:44,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:47:44,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:47:44,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:47:44,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:47:44,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:47:44,913 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 -> 063966206f80cef10873a8e49ae0985aad7f65cb [2020-10-20 01:47:45,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:47:45,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:47:45,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:47:45,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:47:45,132 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:47:45,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-10-20 01:47:45,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d900668/1f99c62e748e4b75aa8944f5122245a1/FLAG2b548d843 [2020-10-20 01:47:45,644 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:47:45,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-10-20 01:47:45,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d900668/1f99c62e748e4b75aa8944f5122245a1/FLAG2b548d843 [2020-10-20 01:47:46,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d900668/1f99c62e748e4b75aa8944f5122245a1 [2020-10-20 01:47:46,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:47:46,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:47:46,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:46,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:47:46,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:47:46,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa86cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46, skipping insertion in model container [2020-10-20 01:47:46,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:47:46,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:47:46,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:46,371 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:47:46,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:46,401 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:47:46,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46 WrapperNode [2020-10-20 01:47:46,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:46,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:46,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:47:46,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:47:46,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:46,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:47:46,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:47:46,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:47:46,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... [2020-10-20 01:47:46,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:47:46,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:47:46,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:47:46,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:47:46,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:47:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:47:46,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:47:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:47:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:47:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-20 01:47:46,517 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-20 01:47:46,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:47:46,742 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:47:46,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:46 BoogieIcfgContainer [2020-10-20 01:47:46,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:47:46,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:47:46,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:47:46,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:47:46,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:47:46" (1/3) ... [2020-10-20 01:47:46,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1621ab51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:46, skipping insertion in model container [2020-10-20 01:47:46,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:46" (2/3) ... [2020-10-20 01:47:46,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1621ab51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:46, skipping insertion in model container [2020-10-20 01:47:46,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:46" (3/3) ... [2020-10-20 01:47:46,754 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-10-20 01:47:46,766 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:47:46,774 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:47:46,795 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:47:46,835 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:47:46,835 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:47:46,835 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:47:46,835 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:47:46,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:47:46,836 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:47:46,836 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:47:46,836 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:47:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-20 01:47:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:47:46,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:46,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:46,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash -730685886, now seen corresponding path program 1 times [2020-10-20 01:47:46,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:46,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234966598] [2020-10-20 01:47:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,117 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 01:47:47,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234966598] [2020-10-20 01:47:47,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:47,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587811188] [2020-10-20 01:47:47,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:47,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:47,141 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-20 01:47:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:47,216 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-20 01:47:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:47,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:47:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:47,230 INFO L225 Difference]: With dead ends: 35 [2020-10-20 01:47:47,230 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 01:47:47,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 01:47:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-20 01:47:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 01:47:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-20 01:47:47,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-10-20 01:47:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:47,285 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-20 01:47:47,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-20 01:47:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:47:47,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:47,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:47,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:47:47,289 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash -461623668, now seen corresponding path program 1 times [2020-10-20 01:47:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:47,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260326370] [2020-10-20 01:47:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,377 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 01:47:47,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260326370] [2020-10-20 01:47:47,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:47,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:47,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514897312] [2020-10-20 01:47:47,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:47,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:47,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:47,381 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-10-20 01:47:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:47,401 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-10-20 01:47:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:47,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 01:47:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:47,403 INFO L225 Difference]: With dead ends: 24 [2020-10-20 01:47:47,404 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:47:47,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:47:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-20 01:47:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 01:47:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-20 01:47:47,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-10-20 01:47:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:47,413 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-20 01:47:47,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-20 01:47:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 01:47:47,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:47,414 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:47,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:47:47,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1253239047, now seen corresponding path program 1 times [2020-10-20 01:47:47,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:47,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170417844] [2020-10-20 01:47:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,570 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 01:47:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170417844] [2020-10-20 01:47:47,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348817045] [2020-10-20 01:47:47,572 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 01:47:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 01:47:47,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:47,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-20 01:47:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348592315] [2020-10-20 01:47:47,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:47:47,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:47:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:47:47,816 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 9 states. [2020-10-20 01:47:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:47,951 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-10-20 01:47:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:47:47,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-20 01:47:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:47,953 INFO L225 Difference]: With dead ends: 35 [2020-10-20 01:47:47,953 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:47:47,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:47:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-20 01:47:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 01:47:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-20 01:47:47,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2020-10-20 01:47:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:47,963 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-20 01:47:47,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:47:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-20 01:47:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 01:47:47,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:47,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:48,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:47:48,182 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1685451365, now seen corresponding path program 1 times [2020-10-20 01:47:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:48,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426525055] [2020-10-20 01:47:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 01:47:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426525055] [2020-10-20 01:47:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101759296] [2020-10-20 01:47:48,285 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 01:47:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 01:47:48,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:48,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:47:48,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172398737] [2020-10-20 01:47:48,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:47:48,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:48,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:47:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:47:48,390 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 7 states. [2020-10-20 01:47:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:48,494 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-10-20 01:47:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:47:48,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-20 01:47:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:48,497 INFO L225 Difference]: With dead ends: 38 [2020-10-20 01:47:48,497 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 01:47:48,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:47:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 01:47:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-20 01:47:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 01:47:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-10-20 01:47:48,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2020-10-20 01:47:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:48,509 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-10-20 01:47:48,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:47:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-10-20 01:47:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 01:47:48,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:48,511 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:48,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:48,727 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:48,728 INFO L82 PathProgramCache]: Analyzing trace with hash 228714308, now seen corresponding path program 2 times [2020-10-20 01:47:48,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:48,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670505866] [2020-10-20 01:47:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-20 01:47:48,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670505866] [2020-10-20 01:47:48,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382414254] [2020-10-20 01:47:48,891 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 01:47:48,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:47:48,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:47:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 01:47:49,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:49,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-20 01:47:49,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354565552] [2020-10-20 01:47:49,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 01:47:49,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 01:47:49,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:47:49,080 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 12 states. [2020-10-20 01:47:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:49,341 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2020-10-20 01:47:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 01:47:49,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-20 01:47:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:49,344 INFO L225 Difference]: With dead ends: 69 [2020-10-20 01:47:49,344 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 01:47:49,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:47:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 01:47:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-20 01:47:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 01:47:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-20 01:47:49,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-10-20 01:47:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:49,355 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-20 01:47:49,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 01:47:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-20 01:47:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-20 01:47:49,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:49,358 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:49,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:49,572 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1825869943, now seen corresponding path program 3 times [2020-10-20 01:47:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:49,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574467532] [2020-10-20 01:47:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-20 01:47:49,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574467532] [2020-10-20 01:47:49,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525338005] [2020-10-20 01:47:49,844 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 01:47:49,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-20 01:47:49,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:47:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-10-20 01:47:49,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:49,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-20 01:47:49,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363150796] [2020-10-20 01:47:49,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:47:49,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:47:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:47:49,954 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-10-20 01:47:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:50,104 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-20 01:47:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:47:50,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-20 01:47:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:50,108 INFO L225 Difference]: With dead ends: 80 [2020-10-20 01:47:50,108 INFO L226 Difference]: Without dead ends: 76 [2020-10-20 01:47:50,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-20 01:47:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-20 01:47:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 01:47:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-10-20 01:47:50,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 79 [2020-10-20 01:47:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:50,126 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-10-20 01:47:50,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:47:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-10-20 01:47:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-20 01:47:50,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:50,130 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:50,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:50,345 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1742961929, now seen corresponding path program 4 times [2020-10-20 01:47:50,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:50,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475610042] [2020-10-20 01:47:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-20 01:47:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-20 01:47:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475610042] [2020-10-20 01:47:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914787356] [2020-10-20 01:47:50,865 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 01:47:50,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:47:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:47:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 01:47:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-20 01:47:51,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:51,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 16 [2020-10-20 01:47:51,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745067488] [2020-10-20 01:47:51,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 01:47:51,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:51,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 01:47:51,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-20 01:47:51,059 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 16 states. [2020-10-20 01:47:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:51,625 INFO L93 Difference]: Finished difference Result 143 states and 252 transitions. [2020-10-20 01:47:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-20 01:47:51,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 133 [2020-10-20 01:47:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:51,629 INFO L225 Difference]: With dead ends: 143 [2020-10-20 01:47:51,629 INFO L226 Difference]: Without dead ends: 66 [2020-10-20 01:47:51,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-10-20 01:47:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-20 01:47:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-20 01:47:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-20 01:47:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-20 01:47:51,647 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 133 [2020-10-20 01:47:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:51,648 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-20 01:47:51,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 01:47:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-20 01:47:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-20 01:47:51,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:51,650 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:51,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 01:47:51,855 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:51,856 INFO L82 PathProgramCache]: Analyzing trace with hash -575030355, now seen corresponding path program 5 times [2020-10-20 01:47:51,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:51,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332899844] [2020-10-20 01:47:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:47:51,876 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:47:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:47:51,894 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:47:51,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:47:51,930 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:47:51,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 01:47:52,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:47:52 BoogieIcfgContainer [2020-10-20 01:47:52,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:47:52,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:47:52,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:47:52,049 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:47:52,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:46" (3/4) ... [2020-10-20 01:47:52,053 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:47:52,140 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:47:52,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:47:52,143 INFO L168 Benchmark]: Toolchain (without parser) took 6068.66 ms. Allocated memory was 36.7 MB in the beginning and 80.2 MB in the end (delta: 43.5 MB). Free memory was 10.6 MB in the beginning and 54.9 MB in the end (delta: -44.3 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 01:47:52,143 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 36.7 MB. Free memory is still 15.7 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 01:47:52,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.43 ms. Allocated memory was 36.7 MB in the beginning and 45.1 MB in the end (delta: 8.4 MB). Free memory was 9.7 MB in the beginning and 28.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:52,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.81 ms. Allocated memory is still 45.1 MB. Free memory was 28.5 MB in the beginning and 26.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:52,145 INFO L168 Benchmark]: Boogie Preprocessor took 15.88 ms. Allocated memory is still 45.1 MB. Free memory was 26.9 MB in the beginning and 25.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:52,146 INFO L168 Benchmark]: RCFGBuilder took 292.68 ms. Allocated memory was 45.1 MB in the beginning and 48.8 MB in the end (delta: 3.7 MB). Free memory was 25.7 MB in the beginning and 29.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:52,147 INFO L168 Benchmark]: TraceAbstraction took 5302.14 ms. Allocated memory was 48.8 MB in the beginning and 80.2 MB in the end (delta: 31.5 MB). Free memory was 29.2 MB in the beginning and 62.4 MB in the end (delta: -33.2 MB). Peak memory consumption was 51.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:52,147 INFO L168 Benchmark]: Witness Printer took 91.63 ms. Allocated memory is still 80.2 MB. Free memory was 61.3 MB in the beginning and 54.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:52,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 36.7 MB. Free memory is still 15.7 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 323.43 ms. Allocated memory was 36.7 MB in the beginning and 45.1 MB in the end (delta: 8.4 MB). Free memory was 9.7 MB in the beginning and 28.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.81 ms. Allocated memory is still 45.1 MB. Free memory was 28.5 MB in the beginning and 26.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 15.88 ms. Allocated memory is still 45.1 MB. Free memory was 26.9 MB in the beginning and 25.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 292.68 ms. Allocated memory was 45.1 MB in the beginning and 48.8 MB in the end (delta: 3.7 MB). Free memory was 25.7 MB in the beginning and 29.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5302.14 ms. Allocated memory was 48.8 MB in the beginning and 80.2 MB in the end (delta: 31.5 MB). Free memory was 29.2 MB in the beginning and 62.4 MB in the end (delta: -33.2 MB). Peak memory consumption was 51.8 MB. Max. memory is 14.3 GB. * Witness Printer took 91.63 ms. Allocated memory is still 80.2 MB. Free memory was 61.3 MB in the beginning and 54.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int x = 5; [L27] CALL, EXPR fibo(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L13] return fibo(n-1) + fibo(n-2); [L27] RET, EXPR fibo(x) [L27] int result = fibo(x); [L28] COND TRUE result == 5 [L4] __assert_fail("0", "fibo_5-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 19, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 210 SDslu, 375 SDs, 0 SdLazy, 640 SolverSat, 172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 465 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 719 NumberOfCodeBlocks, 689 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 601 ConstructedInterpolants, 0 QuantifiedInterpolants, 89271 SizeOfPredicates, 20 NumberOfNonLiveVariables, 696 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 1923/2602 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...