./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/nested9.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0874b2316aff3266709463f0d72702527bf3a82 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 01:00:32,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:00:32,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:00:32,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:00:32,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:00:32,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:00:32,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:00:32,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:00:32,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:00:32,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:00:32,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:00:32,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:00:32,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:00:32,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:00:32,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:00:32,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:00:32,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:00:32,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:00:32,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:00:32,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:00:32,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:00:32,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:00:32,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:00:32,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:00:32,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:00:32,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:00:32,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:00:32,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:00:32,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:00:32,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:00:32,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:00:32,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:00:32,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:00:32,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:00:32,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:00:32,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:00:32,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:00:32,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:00:32,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:00:32,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:00:32,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:00:32,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:00:32,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:00:32,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:00:32,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:00:32,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:00:32,991 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:00:32,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:00:32,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:00:32,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:00:32,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:00:32,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:00:32,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:00:32,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:00:32,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:00:32,992 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:00:32,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:00:32,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:00:32,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:00:32,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:00:32,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:00:32,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:00:32,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:00:32,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:00:32,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:00:32,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:00:32,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:00:32,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:00:32,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:00:32,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:00:32,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:00:32,995 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 -> b0874b2316aff3266709463f0d72702527bf3a82 [2020-10-20 01:00:33,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:00:33,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:00:33,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:00:33,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:00:33,222 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:00:33,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested9.i [2020-10-20 01:00:33,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36981643e/bac73702a76b498ab37916e8bb311fed/FLAG989c36cab [2020-10-20 01:00:33,792 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:00:33,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i [2020-10-20 01:00:33,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36981643e/bac73702a76b498ab37916e8bb311fed/FLAG989c36cab [2020-10-20 01:00:34,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36981643e/bac73702a76b498ab37916e8bb311fed [2020-10-20 01:00:34,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:00:34,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:00:34,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:00:34,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:00:34,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:00:34,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3035c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34, skipping insertion in model container [2020-10-20 01:00:34,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:00:34,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:00:34,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:00:34,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:00:34,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:00:34,558 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:00:34,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34 WrapperNode [2020-10-20 01:00:34,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:00:34,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:00:34,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:00:34,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:00:34,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:00:34,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:00:34,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:00:34,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:00:34,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (1/1) ... [2020-10-20 01:00:34,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:00:34,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:00:34,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:00:34,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:00:34,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (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 01:00:34,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:00:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:00:34,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:00:34,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:00:34,928 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:00:34,928 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-20 01:00:34,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:00:34 BoogieIcfgContainer [2020-10-20 01:00:34,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:00:34,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:00:34,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:00:34,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:00:34,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:00:34" (1/3) ... [2020-10-20 01:00:34,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca0bc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:00:34, skipping insertion in model container [2020-10-20 01:00:34,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:34" (2/3) ... [2020-10-20 01:00:34,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca0bc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:00:34, skipping insertion in model container [2020-10-20 01:00:34,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:00:34" (3/3) ... [2020-10-20 01:00:34,939 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-10-20 01:00:34,951 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:00:34,965 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:00:35,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:00:35,072 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:00:35,072 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:00:35,072 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:00:35,073 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:00:35,073 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:00:35,073 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:00:35,073 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:00:35,073 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:00:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-20 01:00:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 01:00:35,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:35,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:35,100 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash -695179202, now seen corresponding path program 1 times [2020-10-20 01:00:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:35,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665702119] [2020-10-20 01:00:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:35,374 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 01:00:35,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665702119] [2020-10-20 01:00:35,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:00:35,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 01:00:35,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591615200] [2020-10-20 01:00:35,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:00:35,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:00:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:00:35,402 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-10-20 01:00:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:35,574 INFO L93 Difference]: Finished difference Result 74 states and 115 transitions. [2020-10-20 01:00:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:00:35,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-20 01:00:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:35,587 INFO L225 Difference]: With dead ends: 74 [2020-10-20 01:00:35,588 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 01:00:35,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:00:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 01:00:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2020-10-20 01:00:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 01:00:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-20 01:00:35,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-20 01:00:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:35,632 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-20 01:00:35,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:00:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-20 01:00:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 01:00:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:35,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:35,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:00:35,634 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1058384818, now seen corresponding path program 1 times [2020-10-20 01:00:35,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:35,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416718656] [2020-10-20 01:00:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:00:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416718656] [2020-10-20 01:00:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484488197] [2020-10-20 01:00:35,731 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 01:00:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:00:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:00:35,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:00:35,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:00:35,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:00:35,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:00:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:00:36,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:00:36,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2020-10-20 01:00:36,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304817304] [2020-10-20 01:00:36,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:00:36,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:00:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:00:36,026 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2020-10-20 01:00:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:36,158 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-20 01:00:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:00:36,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-20 01:00:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:36,160 INFO L225 Difference]: With dead ends: 50 [2020-10-20 01:00:36,160 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 01:00:36,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:00:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 01:00:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2020-10-20 01:00:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 01:00:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-20 01:00:36,168 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-10-20 01:00:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:36,169 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-20 01:00:36,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:00:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-20 01:00:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 01:00:36,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:36,170 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:36,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 01:00:36,384 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash -678642988, now seen corresponding path program 1 times [2020-10-20 01:00:36,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:36,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091531604] [2020-10-20 01:00:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:00:36,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091531604] [2020-10-20 01:00:36,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102941199] [2020-10-20 01:00:36,477 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 01:00:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 01:00:36,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:00:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:00:36,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:00:36,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-10-20 01:00:36,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236736812] [2020-10-20 01:00:36,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 01:00:36,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 01:00:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:00:36,565 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-10-20 01:00:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:36,591 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-20 01:00:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 01:00:36,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-20 01:00:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:36,592 INFO L225 Difference]: With dead ends: 36 [2020-10-20 01:00:36,592 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 01:00:36,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:00:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 01:00:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-20 01:00:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 01:00:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-20 01:00:36,599 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-20 01:00:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:36,599 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-20 01:00:36,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 01:00:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-20 01:00:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 01:00:36,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:36,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:36,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:00:36,815 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash 59855584, now seen corresponding path program 1 times [2020-10-20 01:00:36,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:36,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708544802] [2020-10-20 01:00:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:00:36,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708544802] [2020-10-20 01:00:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516767305] [2020-10-20 01:00:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:00:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:00:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:00:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:00:37,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:00:37,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-20 01:00:37,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053445254] [2020-10-20 01:00:37,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:00:37,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:00:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:00:37,057 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 11 states. [2020-10-20 01:00:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:37,281 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-20 01:00:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 01:00:37,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-20 01:00:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:37,282 INFO L225 Difference]: With dead ends: 50 [2020-10-20 01:00:37,283 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 01:00:37,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-20 01:00:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 01:00:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-10-20 01:00:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 01:00:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-20 01:00:37,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-10-20 01:00:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:37,291 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-20 01:00:37,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:00:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-20 01:00:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 01:00:37,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:37,293 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:37,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:00:37,507 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash 895141480, now seen corresponding path program 1 times [2020-10-20 01:00:37,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:37,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378081513] [2020-10-20 01:00:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:00:37,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378081513] [2020-10-20 01:00:37,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749535155] [2020-10-20 01:00:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:00:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:00:37,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:00:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 01:00:37,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:00:37,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-10-20 01:00:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290948243] [2020-10-20 01:00:37,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:00:37,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:00:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:00:37,779 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2020-10-20 01:00:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:37,842 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-20 01:00:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:00:37,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-20 01:00:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:37,844 INFO L225 Difference]: With dead ends: 52 [2020-10-20 01:00:37,844 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 01:00:37,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:00:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 01:00:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-20 01:00:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 01:00:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-20 01:00:37,853 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-10-20 01:00:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:37,853 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-20 01:00:37,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:00:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-20 01:00:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 01:00:37,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:37,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:38,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:00:38,071 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:38,072 INFO L82 PathProgramCache]: Analyzing trace with hash 423449338, now seen corresponding path program 2 times [2020-10-20 01:00:38,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:38,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576411810] [2020-10-20 01:00:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 01:00:38,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576411810] [2020-10-20 01:00:38,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871502152] [2020-10-20 01:00:38,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:00:38,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 01:00:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:00:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:00:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:00:38,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:00:38,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:00:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-20 01:00:38,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:00:38,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-10-20 01:00:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665091719] [2020-10-20 01:00:38,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:00:38,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:38,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:00:38,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:00:38,303 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-10-20 01:00:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:38,444 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-20 01:00:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:00:38,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-20 01:00:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:38,445 INFO L225 Difference]: With dead ends: 51 [2020-10-20 01:00:38,446 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:00:38,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:00:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:00:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:00:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:00:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:00:38,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-20 01:00:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:38,448 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:00:38,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:00:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:00:38,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:00:38,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 01:00:38,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:00:38,864 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-10-20 01:00:38,969 INFO L274 CegarLoopResult]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2020-10-20 01:00:38,970 INFO L270 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse0 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 1) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~j~0 .cse2))))) [2020-10-20 01:00:38,970 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-20 01:00:38,970 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-20 01:00:38,970 INFO L270 CegarLoopResult]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse2 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) (<= ULTIMATE.start_main_~i~0 1) .cse2 (<= (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)) ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2))) [2020-10-20 01:00:38,970 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-10-20 01:00:38,971 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-20 01:00:38,972 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:00:38,972 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-20 01:00:38,973 INFO L277 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-10-20 01:00:38,973 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2020-10-20 01:00:38,973 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~i~0))) (or (= ULTIMATE.start_main_~i~0 0) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (<= ULTIMATE.start_main_~j~0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= 2 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2020-10-20 01:00:38,973 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-20 01:00:38,973 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-20 01:00:38,974 INFO L270 CegarLoopResult]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) [2020-10-20 01:00:38,974 INFO L277 CegarLoopResult]: At program point L39(lines 25 40) the Hoare annotation is: true [2020-10-20 01:00:38,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:00:38 BoogieIcfgContainer [2020-10-20 01:00:38,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:00:38,994 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:00:38,995 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:00:38,995 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:00:38,995 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:00:34" (3/4) ... [2020-10-20 01:00:38,999 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:00:39,008 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 01:00:39,009 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:00:39,009 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:00:39,010 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:00:39,070 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:00:39,071 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:00:39,073 INFO L168 Benchmark]: Toolchain (without parser) took 4901.69 ms. Allocated memory was 36.7 MB in the beginning and 61.9 MB in the end (delta: 25.2 MB). Free memory was 11.9 MB in the beginning and 32.1 MB in the end (delta: -20.1 MB). Peak memory consumption was 5.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,074 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 36.2 MB. Free memory was 15.4 MB in the beginning and 15.4 MB in the end (delta: 73.7 kB). Peak memory consumption was 73.7 kB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.33 ms. Allocated memory was 36.7 MB in the beginning and 44.0 MB in the end (delta: 7.3 MB). Free memory was 11.1 MB in the beginning and 26.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,075 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.58 ms. Allocated memory is still 44.0 MB. Free memory was 26.8 MB in the beginning and 25.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,076 INFO L168 Benchmark]: Boogie Preprocessor took 24.26 ms. Allocated memory is still 44.0 MB. Free memory was 25.1 MB in the beginning and 23.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,077 INFO L168 Benchmark]: RCFGBuilder took 310.95 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 23.7 MB in the beginning and 23.0 MB in the end (delta: 630.4 kB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,077 INFO L168 Benchmark]: TraceAbstraction took 4062.79 ms. Allocated memory was 46.1 MB in the beginning and 61.9 MB in the end (delta: 15.7 MB). Free memory was 22.5 MB in the beginning and 35.6 MB in the end (delta: -13.1 MB). Peak memory consumption was 28.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,078 INFO L168 Benchmark]: Witness Printer took 76.52 ms. Allocated memory is still 61.9 MB. Free memory was 35.6 MB in the beginning and 32.1 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:39,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 36.2 MB. Free memory was 15.4 MB in the beginning and 15.4 MB in the end (delta: 73.7 kB). Peak memory consumption was 73.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 381.33 ms. Allocated memory was 36.7 MB in the beginning and 44.0 MB in the end (delta: 7.3 MB). Free memory was 11.1 MB in the beginning and 26.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.58 ms. Allocated memory is still 44.0 MB. Free memory was 26.8 MB in the beginning and 25.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 24.26 ms. Allocated memory is still 44.0 MB. Free memory was 25.1 MB in the beginning and 23.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 310.95 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 23.7 MB in the beginning and 23.0 MB in the end (delta: 630.4 kB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4062.79 ms. Allocated memory was 46.1 MB in the beginning and 61.9 MB in the end (delta: 15.7 MB). Free memory was 22.5 MB in the beginning and 35.6 MB in the end (delta: -13.1 MB). Peak memory consumption was 28.0 MB. Max. memory is 14.3 GB. * Witness Printer took 76.52 ms. Allocated memory is still 61.9 MB. Free memory was 35.6 MB in the beginning and 32.1 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 34]: Loop Invariant Derived loop invariant: (i == 0 || ((i <= 1 && 1 <= i) && j <= 2 * i)) || ((2 <= n && 1 <= cond) && 1 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && i <= 1) && j < 3 * i) || (((2 * i <= j && i < n) && 1 <= cond) && 1 <= i)) || (((2 * i <= j && i == 0) && i + 1 <= n) && j <= 2 * i) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((2 * i <= j && i < n) && k <= j / 2) && i <= 1) && j < 3 * i) && j * -1 / -2 <= k) || (((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 190 SDslu, 215 SDs, 0 SdLazy, 307 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, 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, 6 MinimizatonAttempts, 55 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 144 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1327 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 232 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 221 ConstructedInterpolants, 0 QuantifiedInterpolants, 13571 SizeOfPredicates, 19 NumberOfNonLiveVariables, 374 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 56/84 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...