./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_4.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/loop-simple/nested_4.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 1f0612232c1c27f632e5ebc1ac9944571433fe3b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 01:09:25,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:09:25,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:09:25,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:09:25,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:09:25,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:09:25,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:09:25,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:09:25,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:09:25,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:09:25,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:09:25,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:09:25,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:09:25,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:09:25,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:09:25,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:09:25,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:09:25,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:09:25,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:09:25,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:09:25,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:09:25,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:09:25,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:09:25,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:09:25,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:09:25,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:09:25,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:09:25,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:09:25,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:09:25,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:09:25,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:09:25,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:09:25,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:09:25,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:09:25,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:09:25,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:09:25,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:09:25,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:09:25,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:09:25,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:09:25,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:09:25,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:09:25,982 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:09:25,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:09:25,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:09:25,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:09:25,985 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:09:25,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:09:25,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:09:25,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:09:25,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:09:25,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:09:25,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:09:25,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:09:25,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:09:25,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:09:25,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:09:25,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:09:25,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:09:25,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:09:25,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:09:25,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:09:25,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:09:25,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:09:25,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:09:25,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:09:25,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:09:25,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:09:25,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:09:25,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:09:25,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:09:25,991 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 -> 1f0612232c1c27f632e5ebc1ac9944571433fe3b [2020-10-20 01:09:26,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:09:26,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:09:26,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:09:26,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:09:26,211 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:09:26,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_4.c [2020-10-20 01:09:26,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3065acc73/d99da5a774aa4058a116ced784d6468d/FLAG1b8899fb4 [2020-10-20 01:09:26,848 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:09:26,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c [2020-10-20 01:09:26,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3065acc73/d99da5a774aa4058a116ced784d6468d/FLAG1b8899fb4 [2020-10-20 01:09:27,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3065acc73/d99da5a774aa4058a116ced784d6468d [2020-10-20 01:09:27,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:09:27,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:09:27,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:27,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:09:27,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:09:27,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31567510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27, skipping insertion in model container [2020-10-20 01:09:27,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:09:27,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:09:27,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:27,347 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:09:27,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:27,391 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:09:27,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27 WrapperNode [2020-10-20 01:09:27,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:27,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:27,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:09:27,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:09:27,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:27,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:09:27,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:09:27,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:09:27,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (1/1) ... [2020-10-20 01:09:27,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:09:27,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:09:27,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:09:27,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:09:27,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (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 01:09:27,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:09:27,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:09:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:09:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:09:27,742 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:09:27,742 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 01:09:27,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:27 BoogieIcfgContainer [2020-10-20 01:09:27,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:09:27,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:09:27,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:09:27,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:09:27,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:09:27" (1/3) ... [2020-10-20 01:09:27,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2562cc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:27, skipping insertion in model container [2020-10-20 01:09:27,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:27" (2/3) ... [2020-10-20 01:09:27,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2562cc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:27, skipping insertion in model container [2020-10-20 01:09:27,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:27" (3/3) ... [2020-10-20 01:09:27,757 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2020-10-20 01:09:27,776 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:09:27,784 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:09:27,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:09:27,833 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:09:27,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:09:27,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:09:27,837 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:09:27,837 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:09:27,837 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:09:27,838 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:09:27,838 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:09:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 01:09:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 01:09:27,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 01:09:27,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2020-10-20 01:09:27,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098266332] [2020-10-20 01:09:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,032 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 01:09:28,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098266332] [2020-10-20 01:09:28,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:28,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 01:09:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322746996] [2020-10-20 01:09:28,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:09:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:09:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:09:28,053 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 01:09:28,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,068 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2020-10-20 01:09:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:09:28,070 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-10-20 01:09:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,082 INFO L225 Difference]: With dead ends: 32 [2020-10-20 01:09:28,082 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 01:09:28,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:09:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 01:09:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-20 01:09:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 01:09:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-10-20 01:09:28,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2020-10-20 01:09:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,132 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-10-20 01:09:28,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:09:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-10-20 01:09:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 01:09:28,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 01:09:28,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:09:28,134 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2020-10-20 01:09:28,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32268281] [2020-10-20 01:09:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,190 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 01:09:28,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32268281] [2020-10-20 01:09:28,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:28,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770266592] [2020-10-20 01:09:28,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:28,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,195 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-10-20 01:09:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,214 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-10-20 01:09:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:28,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-10-20 01:09:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,216 INFO L225 Difference]: With dead ends: 24 [2020-10-20 01:09:28,216 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 01:09:28,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 01:09:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-10-20 01:09:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 01:09:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-10-20 01:09:28,222 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2020-10-20 01:09:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,223 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-10-20 01:09:28,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-10-20 01:09:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 01:09:28,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:09:28,224 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2020-10-20 01:09:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547590241] [2020-10-20 01:09:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:28,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547590241] [2020-10-20 01:09:28,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:28,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:28,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468888792] [2020-10-20 01:09:28,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:28,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,262 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-10-20 01:09:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,282 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-10-20 01:09:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:28,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-20 01:09:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,283 INFO L225 Difference]: With dead ends: 31 [2020-10-20 01:09:28,284 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:09:28,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:09:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2020-10-20 01:09:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-20 01:09:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-20 01:09:28,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-10-20 01:09:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,289 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-20 01:09:28,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-20 01:09:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:09:28,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 01:09:28,290 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2020-10-20 01:09:28,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105488685] [2020-10-20 01:09:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,355 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 01:09:28,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105488685] [2020-10-20 01:09:28,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:28,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:28,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920269506] [2020-10-20 01:09:28,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:28,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:28,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,358 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-10-20 01:09:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,385 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-20 01:09:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:28,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 01:09:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,387 INFO L225 Difference]: With dead ends: 31 [2020-10-20 01:09:28,387 INFO L226 Difference]: Without dead ends: 19 [2020-10-20 01:09:28,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-20 01:09:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-10-20 01:09:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 01:09:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-20 01:09:28,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-10-20 01:09:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,393 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-20 01:09:28,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-20 01:09:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 01:09:28,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 01:09:28,395 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,395 INFO L82 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2020-10-20 01:09:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047415022] [2020-10-20 01:09:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:28,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047415022] [2020-10-20 01:09:28,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:28,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:28,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450376105] [2020-10-20 01:09:28,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,433 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-10-20 01:09:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,452 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-20 01:09:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:28,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-20 01:09:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,453 INFO L225 Difference]: With dead ends: 31 [2020-10-20 01:09:28,453 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 01:09:28,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 01:09:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-20 01:09:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 01:09:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-20 01:09:28,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-20 01:09:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,459 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-20 01:09:28,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-20 01:09:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:09:28,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 01:09:28,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2020-10-20 01:09:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281003809] [2020-10-20 01:09:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:28,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281003809] [2020-10-20 01:09:28,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195733443] [2020-10-20 01:09:28,505 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 01:09:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 01:09:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:28,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:28,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 01:09:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473257341] [2020-10-20 01:09:28,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:09:28,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:09:28,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:28,638 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-10-20 01:09:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,666 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-20 01:09:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 01:09:28,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-20 01:09:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,667 INFO L225 Difference]: With dead ends: 34 [2020-10-20 01:09:28,667 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:09:28,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:09:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-20 01:09:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-20 01:09:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-20 01:09:28,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-20 01:09:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,673 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-20 01:09:28,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:09:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-20 01:09:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 01:09:28,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 01:09:28,885 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2020-10-20 01:09:28,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447627147] [2020-10-20 01:09:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 01:09:28,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447627147] [2020-10-20 01:09:28,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849188327] [2020-10-20 01:09:28,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:28,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:29,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:29,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-20 01:09:29,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581204818] [2020-10-20 01:09:29,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:29,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:29,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:29,034 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-10-20 01:09:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,180 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-20 01:09:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:09:29,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-20 01:09:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,182 INFO L225 Difference]: With dead ends: 57 [2020-10-20 01:09:29,182 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 01:09:29,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:09:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 01:09:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-10-20 01:09:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 01:09:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-20 01:09:29,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-20 01:09:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,190 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-20 01:09:29,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-20 01:09:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 01:09:29,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,191 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:29,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,405 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2020-10-20 01:09:29,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:29,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001852227] [2020-10-20 01:09:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-20 01:09:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001852227] [2020-10-20 01:09:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619420068] [2020-10-20 01:09:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 01:09:29,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:29,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 01:09:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-20 01:09:29,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:29,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-20 01:09:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120361134] [2020-10-20 01:09:29,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:29,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:29,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:29,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:29,608 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-20 01:09:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,696 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2020-10-20 01:09:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:09:29,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-20 01:09:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,700 INFO L225 Difference]: With dead ends: 227 [2020-10-20 01:09:29,700 INFO L226 Difference]: Without dead ends: 200 [2020-10-20 01:09:29,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:09:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-20 01:09:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2020-10-20 01:09:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-20 01:09:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-20 01:09:29,738 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2020-10-20 01:09:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,738 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-20 01:09:29,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-20 01:09:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-20 01:09:29,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,745 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:29,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,947 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2020-10-20 01:09:29,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:29,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044067504] [2020-10-20 01:09:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-10-20 01:09:30,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044067504] [2020-10-20 01:09:30,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760803665] [2020-10-20 01:09:30,118 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 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 01:09:30,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:09:30,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:30,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-10-20 01:09:30,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:30,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:30,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137664431] [2020-10-20 01:09:30,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:30,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:30,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:30,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:30,279 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-10-20 01:09:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:30,326 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2020-10-20 01:09:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:30,327 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-20 01:09:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:30,328 INFO L225 Difference]: With dead ends: 204 [2020-10-20 01:09:30,328 INFO L226 Difference]: Without dead ends: 120 [2020-10-20 01:09:30,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-20 01:09:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-10-20 01:09:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-20 01:09:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2020-10-20 01:09:30,359 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2020-10-20 01:09:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:30,365 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2020-10-20 01:09:30,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2020-10-20 01:09:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-20 01:09:30,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:30,376 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:30,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,576 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:30,577 INFO L82 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2020-10-20 01:09:30,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665753678] [2020-10-20 01:09:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2020-10-20 01:09:30,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665753678] [2020-10-20 01:09:30,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098803081] [2020-10-20 01:09:30,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:30,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-20 01:09:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-20 01:09:30,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:30,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:30,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446866941] [2020-10-20 01:09:30,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:30,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:30,758 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 8 states. [2020-10-20 01:09:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:30,811 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2020-10-20 01:09:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:30,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-20 01:09:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:30,813 INFO L225 Difference]: With dead ends: 234 [2020-10-20 01:09:30,814 INFO L226 Difference]: Without dead ends: 136 [2020-10-20 01:09:30,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-20 01:09:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-10-20 01:09:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-20 01:09:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2020-10-20 01:09:30,846 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2020-10-20 01:09:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:30,849 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2020-10-20 01:09:30,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2020-10-20 01:09:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-20 01:09:30,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:30,854 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:31,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 01:09:31,055 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:31,056 INFO L82 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2020-10-20 01:09:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:31,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590904683] [2020-10-20 01:09:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2020-10-20 01:09:31,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590904683] [2020-10-20 01:09:31,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657731616] [2020-10-20 01:09:31,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-20 01:09:31,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:31,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-10-20 01:09:31,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:31,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:31,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074352307] [2020-10-20 01:09:31,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:31,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:31,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:31,336 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 9 states. [2020-10-20 01:09:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:31,384 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2020-10-20 01:09:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:31,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2020-10-20 01:09:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:31,386 INFO L225 Difference]: With dead ends: 256 [2020-10-20 01:09:31,386 INFO L226 Difference]: Without dead ends: 144 [2020-10-20 01:09:31,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-20 01:09:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-20 01:09:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-20 01:09:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2020-10-20 01:09:31,401 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2020-10-20 01:09:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:31,401 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2020-10-20 01:09:31,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2020-10-20 01:09:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-20 01:09:31,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:31,404 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:31,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,618 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2020-10-20 01:09:31,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:31,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323543249] [2020-10-20 01:09:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-10-20 01:09:31,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323543249] [2020-10-20 01:09:31,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294013371] [2020-10-20 01:09:31,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-10-20 01:09:31,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:31,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 01:09:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401445956] [2020-10-20 01:09:31,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:31,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:31,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:31,889 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 6 states. [2020-10-20 01:09:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:31,932 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2020-10-20 01:09:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:09:31,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-10-20 01:09:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:31,934 INFO L225 Difference]: With dead ends: 369 [2020-10-20 01:09:31,934 INFO L226 Difference]: Without dead ends: 260 [2020-10-20 01:09:31,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-20 01:09:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-10-20 01:09:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-20 01:09:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2020-10-20 01:09:31,951 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2020-10-20 01:09:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:31,952 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2020-10-20 01:09:31,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2020-10-20 01:09:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-20 01:09:31,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:31,955 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:32,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:32,170 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2020-10-20 01:09:32,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:32,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454573227] [2020-10-20 01:09:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-10-20 01:09:32,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454573227] [2020-10-20 01:09:32,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377569057] [2020-10-20 01:09:32,288 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:32,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:32,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-10-20 01:09:32,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:32,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:32,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386101091] [2020-10-20 01:09:32,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:32,521 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand 7 states. [2020-10-20 01:09:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:32,589 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2020-10-20 01:09:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:32,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-20 01:09:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:32,592 INFO L225 Difference]: With dead ends: 474 [2020-10-20 01:09:32,592 INFO L226 Difference]: Without dead ends: 320 [2020-10-20 01:09:32,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-20 01:09:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2020-10-20 01:09:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-20 01:09:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2020-10-20 01:09:32,614 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2020-10-20 01:09:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:32,614 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2020-10-20 01:09:32,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2020-10-20 01:09:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-20 01:09:32,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:32,621 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:32,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 01:09:32,835 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2020-10-20 01:09:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:32,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017031284] [2020-10-20 01:09:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2020-10-20 01:09:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017031284] [2020-10-20 01:09:33,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597338075] [2020-10-20 01:09:33,075 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:33,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-10-20 01:09:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2020-10-20 01:09:33,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:33,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:33,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274549409] [2020-10-20 01:09:33,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:33,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:33,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:33,294 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand 8 states. [2020-10-20 01:09:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:33,355 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2020-10-20 01:09:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:33,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-10-20 01:09:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:33,358 INFO L225 Difference]: With dead ends: 579 [2020-10-20 01:09:33,358 INFO L226 Difference]: Without dead ends: 380 [2020-10-20 01:09:33,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-20 01:09:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2020-10-20 01:09:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-20 01:09:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2020-10-20 01:09:33,380 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2020-10-20 01:09:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:33,381 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2020-10-20 01:09:33,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2020-10-20 01:09:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-20 01:09:33,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:33,386 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:33,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:33,601 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2020-10-20 01:09:33,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:33,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084546491] [2020-10-20 01:09:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-10-20 01:09:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084546491] [2020-10-20 01:09:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356962814] [2020-10-20 01:09:33,844 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:34,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:09:34,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-10-20 01:09:34,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:34,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:34,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827683585] [2020-10-20 01:09:34,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:34,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:34,126 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand 9 states. [2020-10-20 01:09:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:34,178 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2020-10-20 01:09:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:34,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-10-20 01:09:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:34,182 INFO L225 Difference]: With dead ends: 628 [2020-10-20 01:09:34,182 INFO L226 Difference]: Without dead ends: 384 [2020-10-20 01:09:34,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-20 01:09:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2020-10-20 01:09:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-20 01:09:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2020-10-20 01:09:34,220 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2020-10-20 01:09:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:34,221 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2020-10-20 01:09:34,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2020-10-20 01:09:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-10-20 01:09:34,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:34,228 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:34,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 01:09:34,442 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:34,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2020-10-20 01:09:34,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:34,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190851121] [2020-10-20 01:09:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-10-20 01:09:34,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190851121] [2020-10-20 01:09:34,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472227057] [2020-10-20 01:09:34,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:34,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2020-10-20 01:09:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-10-20 01:09:35,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:35,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 01:09:35,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997365618] [2020-10-20 01:09:35,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:35,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:35,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:35,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:35,062 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand 6 states. [2020-10-20 01:09:35,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:35,127 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2020-10-20 01:09:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:09:35,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 383 [2020-10-20 01:09:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:35,132 INFO L225 Difference]: With dead ends: 948 [2020-10-20 01:09:35,132 INFO L226 Difference]: Without dead ends: 754 [2020-10-20 01:09:35,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-20 01:09:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2020-10-20 01:09:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-10-20 01:09:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2020-10-20 01:09:35,266 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2020-10-20 01:09:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:35,267 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2020-10-20 01:09:35,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2020-10-20 01:09:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2020-10-20 01:09:35,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:35,279 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:35,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 01:09:35,493 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:35,494 INFO L82 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2020-10-20 01:09:35,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:35,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218401335] [2020-10-20 01:09:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2020-10-20 01:09:35,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218401335] [2020-10-20 01:09:35,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100225232] [2020-10-20 01:09:35,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:36,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2020-10-20 01:09:36,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2020-10-20 01:09:36,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-20 01:09:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518750288] [2020-10-20 01:09:36,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:36,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:36,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:36,673 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand 9 states. [2020-10-20 01:09:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:36,960 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2020-10-20 01:09:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 01:09:36,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 569 [2020-10-20 01:09:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:36,969 INFO L225 Difference]: With dead ends: 2160 [2020-10-20 01:09:36,970 INFO L226 Difference]: Without dead ends: 1873 [2020-10-20 01:09:36,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-10-20 01:09:36,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-10-20 01:09:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2020-10-20 01:09:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-10-20 01:09:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2020-10-20 01:09:37,055 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2020-10-20 01:09:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:37,056 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2020-10-20 01:09:37,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2020-10-20 01:09:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2020-10-20 01:09:37,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:37,103 INFO L422 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-20 01:09:37,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 01:09:37,317 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2020-10-20 01:09:37,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:37,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140782984] [2020-10-20 01:09:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-10-20 01:09:39,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140782984] [2020-10-20 01:09:39,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842957215] [2020-10-20 01:09:39,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-10-20 01:09:39,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:39,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501059096] [2020-10-20 01:09:39,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:39,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:39,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:39,995 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand 8 states. [2020-10-20 01:09:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:40,130 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2020-10-20 01:09:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:40,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1130 [2020-10-20 01:09:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:40,140 INFO L225 Difference]: With dead ends: 2441 [2020-10-20 01:09:40,140 INFO L226 Difference]: Without dead ends: 1686 [2020-10-20 01:09:40,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-10-20 01:09:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2020-10-20 01:09:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1410 states. [2020-10-20 01:09:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2020-10-20 01:09:40,251 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2020-10-20 01:09:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:40,252 INFO L481 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2020-10-20 01:09:40,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2020-10-20 01:09:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2020-10-20 01:09:40,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:40,272 INFO L422 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-20 01:09:40,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 01:09:40,488 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2020-10-20 01:09:40,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:40,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761609252] [2020-10-20 01:09:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-10-20 01:09:42,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761609252] [2020-10-20 01:09:42,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194485599] [2020-10-20 01:09:42,167 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:42,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:42,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:42,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-10-20 01:09:43,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:43,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:43,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830843996] [2020-10-20 01:09:43,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:43,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:43,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:43,995 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand 9 states. [2020-10-20 01:09:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:44,109 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2020-10-20 01:09:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:44,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1409 [2020-10-20 01:09:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:44,117 INFO L225 Difference]: With dead ends: 2630 [2020-10-20 01:09:44,117 INFO L226 Difference]: Without dead ends: 1689 [2020-10-20 01:09:44,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2020-10-20 01:09:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2020-10-20 01:09:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-10-20 01:09:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2020-10-20 01:09:44,205 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2020-10-20 01:09:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:44,206 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2020-10-20 01:09:44,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2020-10-20 01:09:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-10-20 01:09:44,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:44,231 INFO L422 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-20 01:09:44,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:44,445 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2020-10-20 01:09:44,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:44,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750905184] [2020-10-20 01:09:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2020-10-20 01:09:47,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750905184] [2020-10-20 01:09:47,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060879358] [2020-10-20 01:09:47,933 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:48,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2020-10-20 01:09:48,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 01:09:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242798 proven. 0 refuted. 0 times theorem prover too weak. 266245 trivial. 0 not checked. [2020-10-20 01:09:50,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:09:50,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2020-10-20 01:09:50,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679899797] [2020-10-20 01:09:50,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:09:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:09:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:09:50,228 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand 14 states. [2020-10-20 01:09:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:50,391 INFO L93 Difference]: Finished difference Result 1689 states and 1818 transitions. [2020-10-20 01:09:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 01:09:50,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1688 [2020-10-20 01:09:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:50,397 INFO L225 Difference]: With dead ends: 1689 [2020-10-20 01:09:50,397 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:09:50,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 1677 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:09:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:09:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:09:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:09:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:09:50,402 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2020-10-20 01:09:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:50,403 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:09:50,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:09:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:09:50,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:09:50,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:50,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:09:51,247 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 42 [2020-10-20 01:10:01,657 WARN L193 SmtUtils]: Spent 10.40 s on a formula simplification. DAG size of input: 2360 DAG size of output: 404 [2020-10-20 01:10:04,551 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 382 DAG size of output: 10 [2020-10-20 01:10:04,627 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-20 01:10:04,627 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2020-10-20 01:10:04,627 INFO L270 CegarLoopResult]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (<= 6 ULTIMATE.start_main_~d~0) (<= ULTIMATE.start_main_~d~0 6) (<= ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~c~0)) [2020-10-20 01:10:04,627 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:10:04,627 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:10:04,627 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:10:04,628 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-10-20 01:10:04,628 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2020-10-20 01:10:04,628 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (< ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~d~0) (<= ULTIMATE.start_main_~d~0 6)) [2020-10-20 01:10:04,628 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:10:04,628 INFO L274 CegarLoopResult]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2020-10-20 01:10:04,628 INFO L270 CegarLoopResult]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (<= ULTIMATE.start_main_~d~0 6) (< ULTIMATE.start_main_~c~0 6)) [2020-10-20 01:10:04,628 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-20 01:10:04,628 INFO L277 CegarLoopResult]: At program point L34(lines 15 35) the Hoare annotation is: true [2020-10-20 01:10:04,628 INFO L274 CegarLoopResult]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2020-10-20 01:10:04,629 INFO L270 CegarLoopResult]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (<= 6 ULTIMATE.start_main_~d~0) (<= ULTIMATE.start_main_~d~0 6) (<= ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~b~0) (<= 6 ULTIMATE.start_main_~c~0)) [2020-10-20 01:10:04,629 INFO L274 CegarLoopResult]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2020-10-20 01:10:04,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:10:04 BoogieIcfgContainer [2020-10-20 01:10:04,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:10:04,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:10:04,648 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:10:04,649 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:10:04,655 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:27" (3/4) ... [2020-10-20 01:10:04,659 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:10:04,672 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 01:10:04,672 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:10:04,672 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:10:04,672 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:10:04,722 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:10:04,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:10:04,723 INFO L168 Benchmark]: Toolchain (without parser) took 37610.43 ms. Allocated memory was 41.9 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 22.7 MB in the beginning and 795.2 MB in the end (delta: -772.5 MB). Peak memory consumption was 289.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,724 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 32.0 MB. Free memory was 11.0 MB in the beginning and 10.9 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.91 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 23.8 MB in the end (delta: -1.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,725 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.38 ms. Allocated memory is still 42.5 MB. Free memory was 23.8 MB in the beginning and 22.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,726 INFO L168 Benchmark]: Boogie Preprocessor took 22.19 ms. Allocated memory is still 42.5 MB. Free memory was 22.1 MB in the beginning and 20.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,727 INFO L168 Benchmark]: RCFGBuilder took 293.15 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 20.7 MB in the beginning and 26.2 MB in the end (delta: -5.5 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,727 INFO L168 Benchmark]: TraceAbstraction took 36902.67 ms. Allocated memory was 45.1 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 25.7 MB in the beginning and 795.2 MB in the end (delta: -769.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,728 INFO L168 Benchmark]: Witness Printer took 73.69 ms. Allocated memory is still 1.1 GB. Free memory was 795.2 MB in the beginning and 795.2 MB in the end (delta: 2.1 kB). Peak memory consumption was 2.1 kB. Max. memory is 14.3 GB. [2020-10-20 01:10:04,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 32.0 MB. Free memory was 11.0 MB in the beginning and 10.9 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 271.91 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 23.8 MB in the end (delta: -1.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.38 ms. Allocated memory is still 42.5 MB. Free memory was 23.8 MB in the beginning and 22.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.19 ms. Allocated memory is still 42.5 MB. Free memory was 22.1 MB in the beginning and 20.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 293.15 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 20.7 MB in the beginning and 26.2 MB in the end (delta: -5.5 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 36902.67 ms. Allocated memory was 45.1 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 25.7 MB in the beginning and 795.2 MB in the end (delta: -769.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 14.3 GB. * Witness Printer took 73.69 ms. Allocated memory is still 1.1 GB. Free memory was 795.2 MB in the beginning and 795.2 MB in the end (delta: 2.1 kB). Peak memory consumption was 2.1 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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: 24]: Loop Invariant Derived loop invariant: (((a < 6 && c <= 6) && b < 6) && 6 <= d) && d <= 6 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((a < 6 && b < 6) && d <= 6) && c < 6 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((a <= 6 && c <= 6) && 6 <= d) && d <= 6) && b <= 6) && 6 <= b) && 6 <= c - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((a < 6 && c <= 6) && 6 <= d) && d <= 6) && b <= 6) && 6 <= c - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.7s, OverallIterations: 20, TraceHistogramMax: 648, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 557 SDslu, 596 SDs, 0 SdLazy, 420 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6619 GetRequests, 6501 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 913 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 578533 FormulaSimplificationTreeSizeReduction, 11.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 21468 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 27926649 SizeOfPredicates, 18 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 1935239/2423578 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...