/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:04:12,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:04:12,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:04:12,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:04:12,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:04:12,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:04:12,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:04:12,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:04:12,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:04:12,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:04:12,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:04:12,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:04:12,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:04:12,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:04:12,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:04:12,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:04:12,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:04:12,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:04:12,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:04:12,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:04:12,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:04:12,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:04:12,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:04:12,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:04:12,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:04:12,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:04:12,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:04:12,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:04:12,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:04:12,530 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:04:12,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:04:12,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:04:12,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:04:12,535 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:04:12,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:04:12,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:04:12,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:04:12,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:04:12,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:04:12,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:04:12,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:04:12,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:04:12,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:04:12,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:04:12,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:04:12,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:04:12,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:12,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:04:12,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:04:12,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:04:12,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:04:12,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:04:12,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:04:12,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:04:12,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:04:12,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:04:12,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:04:12,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:04:12,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:04:12,983 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:04:12,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2020-12-22 07:04:13,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b32ccbc/939a143eea6049d892772c3744ea411a/FLAG22895f7b6 [2020-12-22 07:04:13,737 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:04:13,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2020-12-22 07:04:13,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b32ccbc/939a143eea6049d892772c3744ea411a/FLAG22895f7b6 [2020-12-22 07:04:14,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b32ccbc/939a143eea6049d892772c3744ea411a [2020-12-22 07:04:14,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:04:14,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:04:14,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:14,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:04:14,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:04:14,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14, skipping insertion in model container [2020-12-22 07:04:14,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:04:14,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:04:14,289 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-2.c[481,494] [2020-12-22 07:04:14,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:14,303 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:04:14,319 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-2.c[481,494] [2020-12-22 07:04:14,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:14,335 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:04:14,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14 WrapperNode [2020-12-22 07:04:14,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:14,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:14,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:04:14,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:04:14,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:14,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:04:14,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:04:14,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:04:14,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (1/1) ... [2020-12-22 07:04:14,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:04:14,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:04:14,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:04:14,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:04:14,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (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 [2020-12-22 07:04:14,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:04:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:04:14,493 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-22 07:04:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-22 07:04:14,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:04:14,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:04:14,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:04:14,719 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:04:14,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:14 BoogieIcfgContainer [2020-12-22 07:04:14,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:04:14,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:04:14,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:04:14,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:04:14,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:14" (1/3) ... [2020-12-22 07:04:14,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b97be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:14, skipping insertion in model container [2020-12-22 07:04:14,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:14" (2/3) ... [2020-12-22 07:04:14,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b97be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:14, skipping insertion in model container [2020-12-22 07:04:14,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:14" (3/3) ... [2020-12-22 07:04:14,732 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-12-22 07:04:14,739 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:04:14,744 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:04:14,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:04:14,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:04:14,800 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:04:14,800 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:04:14,800 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:04:14,800 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:04:14,801 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:04:14,801 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:04:14,801 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:04:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 07:04:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 07:04:14,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:14,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:14,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:14,833 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-22 07:04:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:14,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899345611] [2020-12-22 07:04:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899345611] [2020-12-22 07:04:15,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:04:15,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:04:15,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801275871] [2020-12-22 07:04:15,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:04:15,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:15,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:04:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:04:15,294 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-22 07:04:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:15,453 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 07:04:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:04:15,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 07:04:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:15,467 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:15,467 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 07:04:15,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:04:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 07:04:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 07:04:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 07:04:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 07:04:15,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-22 07:04:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:15,543 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 07:04:15,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:04:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 07:04:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 07:04:15,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:15,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:15,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:04:15,546 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-22 07:04:15,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:15,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402016263] [2020-12-22 07:04:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:15,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402016263] [2020-12-22 07:04:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364650235] [2020-12-22 07:04:15,699 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 [2020-12-22 07:04:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 07:04:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:15,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:15,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 07:04:15,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001048836] [2020-12-22 07:04:15,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:04:15,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:15,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:04:15,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:04:15,884 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 07:04:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:15,965 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 07:04:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:04:15,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 07:04:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:15,968 INFO L225 Difference]: With dead ends: 22 [2020-12-22 07:04:15,968 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 07:04:15,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 07:04:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 07:04:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:04:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 07:04:15,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-22 07:04:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:15,989 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 07:04:15,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:04:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 07:04:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 07:04:15,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:15,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:16,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 07:04:16,209 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-22 07:04:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:16,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918513463] [2020-12-22 07:04:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918513463] [2020-12-22 07:04:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449850354] [2020-12-22 07:04:16,403 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 [2020-12-22 07:04:16,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:16,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 07:04:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:16,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:16,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 07:04:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310873348] [2020-12-22 07:04:16,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:04:16,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:04:16,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:04:16,541 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-22 07:04:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:16,602 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-22 07:04:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:04:16,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 07:04:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:16,604 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:16,604 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 07:04:16,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 07:04:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 07:04:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 07:04:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 07:04:16,611 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-22 07:04:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:16,612 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 07:04:16,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:04:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 07:04:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 07:04:16,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:16,614 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:16,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:16,830 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-22 07:04:16,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:16,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39963745] [2020-12-22 07:04:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:17,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39963745] [2020-12-22 07:04:17,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534666612] [2020-12-22 07:04:17,070 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 [2020-12-22 07:04:17,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 07:04:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 07:04:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:17,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:17,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 07:04:17,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335996216] [2020-12-22 07:04:17,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:04:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:04:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:17,218 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-22 07:04:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:17,292 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-22 07:04:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:04:17,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 07:04:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:17,294 INFO L225 Difference]: With dead ends: 28 [2020-12-22 07:04:17,294 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 07:04:17,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 07:04:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 07:04:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 07:04:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 07:04:17,302 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-22 07:04:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:17,302 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 07:04:17,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:04:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 07:04:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 07:04:17,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:17,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:17,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:17,520 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-22 07:04:17,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:17,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53973992] [2020-12-22 07:04:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:17,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53973992] [2020-12-22 07:04:17,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540123548] [2020-12-22 07:04:17,683 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 [2020-12-22 07:04:17,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:17,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:04:17,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:17,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:17,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 07:04:17,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358509687] [2020-12-22 07:04:17,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:04:17,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:17,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:04:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:04:17,827 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 07:04:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:17,901 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-22 07:04:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:04:17,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 07:04:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:17,903 INFO L225 Difference]: With dead ends: 31 [2020-12-22 07:04:17,903 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 07:04:17,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 07:04:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 07:04:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 07:04:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 07:04:17,910 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-22 07:04:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:17,911 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 07:04:17,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:04:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 07:04:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:04:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:17,913 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:18,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:18,128 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-22 07:04:18,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:18,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376342537] [2020-12-22 07:04:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376342537] [2020-12-22 07:04:18,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204987976] [2020-12-22 07:04:18,379 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 [2020-12-22 07:04:18,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 07:04:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 07:04:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:18,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:18,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 07:04:18,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079034296] [2020-12-22 07:04:18,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 07:04:18,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 07:04:18,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:18,557 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-22 07:04:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:18,661 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-22 07:04:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:04:18,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-22 07:04:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:18,663 INFO L225 Difference]: With dead ends: 34 [2020-12-22 07:04:18,664 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 07:04:18,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 07:04:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 07:04:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 07:04:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 07:04:18,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-22 07:04:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:18,681 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 07:04:18,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 07:04:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 07:04:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 07:04:18,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:18,684 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:18,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 07:04:18,899 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-22 07:04:18,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:18,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639552399] [2020-12-22 07:04:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:19,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639552399] [2020-12-22 07:04:19,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849151607] [2020-12-22 07:04:19,109 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 [2020-12-22 07:04:19,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 07:04:19,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:19,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:04:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:19,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:19,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 07:04:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226907679] [2020-12-22 07:04:19,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:04:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:04:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:04:19,350 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-22 07:04:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:19,468 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-22 07:04:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:04:19,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-22 07:04:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:19,470 INFO L225 Difference]: With dead ends: 37 [2020-12-22 07:04:19,470 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 07:04:19,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 07:04:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 07:04:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 07:04:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 07:04:19,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-22 07:04:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:19,477 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 07:04:19,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:04:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 07:04:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:04:19,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:19,479 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:19,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:19,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-22 07:04:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:19,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859653261] [2020-12-22 07:04:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:19,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859653261] [2020-12-22 07:04:19,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054823379] [2020-12-22 07:04:19,936 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 [2020-12-22 07:04:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 07:04:20,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:20,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:20,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 07:04:20,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305271884] [2020-12-22 07:04:20,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 07:04:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 07:04:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:20,143 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-22 07:04:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:20,291 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-22 07:04:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:04:20,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-22 07:04:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:20,293 INFO L225 Difference]: With dead ends: 40 [2020-12-22 07:04:20,293 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 07:04:20,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:04:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 07:04:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 07:04:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 07:04:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 07:04:20,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-22 07:04:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:20,300 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 07:04:20,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 07:04:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 07:04:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:04:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:20,302 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:20,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:20,516 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:20,517 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-22 07:04:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:20,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022458396] [2020-12-22 07:04:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:20,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022458396] [2020-12-22 07:04:20,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360144330] [2020-12-22 07:04:20,801 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 [2020-12-22 07:04:20,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:20,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:04:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:21,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:21,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 07:04:21,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753265424] [2020-12-22 07:04:21,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:04:21,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:04:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:04:21,020 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-22 07:04:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:21,178 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-22 07:04:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:04:21,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-22 07:04:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:21,180 INFO L225 Difference]: With dead ends: 43 [2020-12-22 07:04:21,180 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 07:04:21,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:04:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 07:04:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 07:04:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 07:04:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 07:04:21,187 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-22 07:04:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:21,188 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 07:04:21,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:04:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 07:04:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:04:21,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:21,189 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:21,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 07:04:21,403 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-22 07:04:21,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:21,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481318424] [2020-12-22 07:04:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:21,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481318424] [2020-12-22 07:04:21,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120947461] [2020-12-22 07:04:21,733 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 [2020-12-22 07:04:21,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 07:04:21,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 07:04:21,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:21,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:21,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 07:04:21,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068518950] [2020-12-22 07:04:21,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 07:04:21,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 07:04:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:21,978 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-22 07:04:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:22,121 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-22 07:04:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 07:04:22,121 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-22 07:04:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:22,123 INFO L225 Difference]: With dead ends: 46 [2020-12-22 07:04:22,123 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 07:04:22,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-22 07:04:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 07:04:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 07:04:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 07:04:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 07:04:22,130 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-22 07:04:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:22,130 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 07:04:22,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 07:04:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 07:04:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:04:22,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:22,132 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:22,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:22,346 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:22,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-22 07:04:22,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:22,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300939019] [2020-12-22 07:04:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-22 07:04:22,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300939019] [2020-12-22 07:04:22,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152517827] [2020-12-22 07:04:22,798 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 [2020-12-22 07:04:22,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:22,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 07:04:22,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-22 07:04:23,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:23,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 07:04:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116373521] [2020-12-22 07:04:23,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 07:04:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 07:04:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-22 07:04:23,010 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-12-22 07:04:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:23,154 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-22 07:04:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 07:04:23,154 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-22 07:04:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:23,156 INFO L225 Difference]: With dead ends: 49 [2020-12-22 07:04:23,156 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 07:04:23,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-12-22 07:04:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 07:04:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 07:04:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 07:04:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-22 07:04:23,162 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-22 07:04:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:23,163 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-22 07:04:23,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 07:04:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-22 07:04:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:04:23,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:23,164 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:23,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:23,379 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-22 07:04:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:23,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454616989] [2020-12-22 07:04:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 07:04:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454616989] [2020-12-22 07:04:23,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900323343] [2020-12-22 07:04:23,841 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 [2020-12-22 07:04:23,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 07:04:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 07:04:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 07:04:24,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:24,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 07:04:24,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847553849] [2020-12-22 07:04:24,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:04:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:04:24,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:24,075 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-12-22 07:04:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:24,288 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-22 07:04:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 07:04:24,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-22 07:04:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:24,290 INFO L225 Difference]: With dead ends: 52 [2020-12-22 07:04:24,290 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 07:04:24,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-22 07:04:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 07:04:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 07:04:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 07:04:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 07:04:24,298 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-22 07:04:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:24,299 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 07:04:24,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:04:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 07:04:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:04:24,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:24,301 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:24,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:04:24,515 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:24,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-22 07:04:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:24,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417316802] [2020-12-22 07:04:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 07:04:25,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417316802] [2020-12-22 07:04:25,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416646563] [2020-12-22 07:04:25,026 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 [2020-12-22 07:04:25,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 07:04:25,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:25,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 07:04:25,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 07:04:25,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:25,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 07:04:25,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816159994] [2020-12-22 07:04:25,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 07:04:25,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 07:04:25,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-22 07:04:25,293 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-12-22 07:04:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:25,498 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-22 07:04:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 07:04:25,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-22 07:04:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:25,500 INFO L225 Difference]: With dead ends: 55 [2020-12-22 07:04:25,500 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 07:04:25,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-12-22 07:04:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 07:04:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 07:04:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 07:04:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 07:04:25,507 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-22 07:04:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:25,507 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 07:04:25,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 07:04:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 07:04:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 07:04:25,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:25,509 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:25,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 07:04:25,723 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:25,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-22 07:04:25,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:25,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748626209] [2020-12-22 07:04:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 07:04:26,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748626209] [2020-12-22 07:04:26,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732886553] [2020-12-22 07:04:26,277 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 [2020-12-22 07:04:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 07:04:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 07:04:26,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:26,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 07:04:26,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529107857] [2020-12-22 07:04:26,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 07:04:26,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 07:04:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:26,501 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-22 07:04:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:26,697 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-22 07:04:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 07:04:26,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-12-22 07:04:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:26,698 INFO L225 Difference]: With dead ends: 58 [2020-12-22 07:04:26,698 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 07:04:26,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:04:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 07:04:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 07:04:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 07:04:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-22 07:04:26,705 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-22 07:04:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:26,706 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-22 07:04:26,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 07:04:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-22 07:04:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:04:26,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:26,707 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:26,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:04:26,921 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-22 07:04:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:26,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431427023] [2020-12-22 07:04:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-22 07:04:27,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431427023] [2020-12-22 07:04:27,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937640576] [2020-12-22 07:04:27,619 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 [2020-12-22 07:04:27,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 07:04:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-22 07:04:27,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:27,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 07:04:27,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367189140] [2020-12-22 07:04:27,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 07:04:27,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 07:04:27,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:04:27,892 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-12-22 07:04:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:28,133 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-22 07:04:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 07:04:28,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-12-22 07:04:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:28,134 INFO L225 Difference]: With dead ends: 61 [2020-12-22 07:04:28,134 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 07:04:28,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 07:04:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 07:04:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 07:04:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 07:04:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-22 07:04:28,148 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-22 07:04:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:28,153 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-22 07:04:28,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 07:04:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-22 07:04:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:04:28,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:28,155 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:28,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:28,369 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-22 07:04:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:28,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534166975] [2020-12-22 07:04:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 07:04:28,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 07:04:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 07:04:28,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 07:04:28,477 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 07:04:28,477 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 07:04:28,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:04:28,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:04:28 BoogieIcfgContainer [2020-12-22 07:04:28,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:04:28,595 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:04:28,595 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:04:28,595 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:04:28,595 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:14" (3/4) ... [2020-12-22 07:04:28,598 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 07:04:28,673 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_15x0-2.c-witness.graphml [2020-12-22 07:04:28,673 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:04:28,678 INFO L168 Benchmark]: Toolchain (without parser) took 14567.98 ms. Allocated memory was 153.1 MB in the beginning and 324.0 MB in the end (delta: 170.9 MB). Free memory was 129.1 MB in the beginning and 166.8 MB in the end (delta: -37.7 MB). Peak memory consumption was 134.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,679 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 153.1 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:04:28,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.16 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 119.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,680 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.38 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 118.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,680 INFO L168 Benchmark]: Boogie Preprocessor took 19.12 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 117.4 MB in the end (delta: 953.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,681 INFO L168 Benchmark]: RCFGBuilder took 328.75 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 105.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,682 INFO L168 Benchmark]: TraceAbstraction took 13870.67 ms. Allocated memory was 153.1 MB in the beginning and 324.0 MB in the end (delta: 170.9 MB). Free memory was 105.4 MB in the beginning and 172.0 MB in the end (delta: -66.6 MB). Peak memory consumption was 105.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,689 INFO L168 Benchmark]: Witness Printer took 78.85 ms. Allocated memory is still 324.0 MB. Free memory was 172.0 MB in the beginning and 166.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:28,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 153.1 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.16 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 119.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.38 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 118.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.12 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 117.4 MB in the end (delta: 953.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.75 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 105.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13870.67 ms. Allocated memory was 153.1 MB in the beginning and 324.0 MB in the end (delta: 170.9 MB). Free memory was 105.4 MB in the beginning and 172.0 MB in the end (delta: -66.6 MB). Peak memory consumption was 105.1 MB. Max. memory is 8.0 GB. * Witness Printer took 78.85 ms. Allocated memory is still 324.0 MB. Free memory was 172.0 MB in the beginning and 166.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 15; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.6s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 137 SDtfs, 495 SDslu, 563 SDs, 0 SdLazy, 584 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1281 GetRequests, 997 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 1650 NumberOfCodeBlocks, 1650 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1521 ConstructedInterpolants, 0 QuantifiedInterpolants, 250977 SizeOfPredicates, 133 NumberOfNonLiveVariables, 2702 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...