/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:21:24,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:21:24,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:21:24,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:21:24,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:21:24,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:21:24,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:21:24,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:21:24,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:21:24,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:21:24,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:21:24,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:21:24,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:21:24,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:21:24,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:21:24,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:21:24,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:21:24,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:21:24,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:21:24,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:21:24,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:21:24,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:21:24,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:21:24,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:21:24,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:21:24,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:21:24,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:21:24,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:21:24,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:21:24,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:21:24,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:21:24,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:21:24,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:21:24,515 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:21:24,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:21:24,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:21:24,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:21:24,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:21:24,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:21:24,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:21:24,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:21:24,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:21:24,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:21:24,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:21:24,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:21:24,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:21:24,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:21:24,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:21:24,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:21:24,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:21:24,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:21:24,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:21:24,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:21:24,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:21:24,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:21:24,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:21:24,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:21:24,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:21:24,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:21:24,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:21:25,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:21:25,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:21:25,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:21:25,015 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:21:25,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-09-04 13:21:25,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23a103b5d/288232bf13a7471b84114873a52a7939/FLAGe20f2724c [2020-09-04 13:21:25,700 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:21:25,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-09-04 13:21:25,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23a103b5d/288232bf13a7471b84114873a52a7939/FLAGe20f2724c [2020-09-04 13:21:26,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23a103b5d/288232bf13a7471b84114873a52a7939 [2020-09-04 13:21:26,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:21:26,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:21:26,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:26,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:21:26,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:21:26,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706d6376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26, skipping insertion in model container [2020-09-04 13:21:26,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:21:26,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:21:26,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:26,291 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:21:26,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:26,324 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:21:26,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26 WrapperNode [2020-09-04 13:21:26,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:26,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:21:26,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:21:26,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:21:26,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... [2020-09-04 13:21:26,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:21:26,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:21:26,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:21:26,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:21:26,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:21:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:21:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 13:21:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:21:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:21:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:21:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 13:21:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:21:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:21:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:21:26,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:21:26,730 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:21:26,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:26 BoogieIcfgContainer [2020-09-04 13:21:26,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:21:26,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:21:26,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:21:26,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:21:26,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:21:26" (1/3) ... [2020-09-04 13:21:26,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54777c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:26, skipping insertion in model container [2020-09-04 13:21:26,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:26" (2/3) ... [2020-09-04 13:21:26,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54777c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:26, skipping insertion in model container [2020-09-04 13:21:26,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:26" (3/3) ... [2020-09-04 13:21:26,748 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-09-04 13:21:26,760 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:21:26,770 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:21:26,794 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:21:26,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:21:26,826 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:21:26,827 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:21:26,827 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:21:26,827 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:21:26,827 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:21:26,828 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:21:26,828 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:21:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 13:21:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:21:26,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:26,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:26,858 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-04 13:21:26,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:26,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000570181] [2020-09-04 13:21:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:21:27,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000570181] [2020-09-04 13:21:27,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:27,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:21:27,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068330826] [2020-09-04 13:21:27,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:27,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:27,263 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-04 13:21:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:27,361 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-04 13:21:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:27,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:21:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:27,377 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:21:27,377 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 13:21:27,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:21:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 13:21:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 13:21:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:21:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:21:27,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:21:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:27,431 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:21:27,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:21:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:21:27,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:27,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:27,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:21:27,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-04 13:21:27,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:27,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102030007] [2020-09-04 13:21:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:27,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102030007] [2020-09-04 13:21:27,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068868320] [2020-09-04 13:21:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:27,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:21:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:27,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:27,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-09-04 13:21:27,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417610056] [2020-09-04 13:21:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:21:27,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:21:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:21:27,765 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-09-04 13:21:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:27,835 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 13:21:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:21:27,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-04 13:21:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:27,837 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:21:27,838 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:21:27,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:21:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:21:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:21:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:21:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:21:27,847 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-04 13:21:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:27,848 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:21:27,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:21:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:21:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:21:27,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:27,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:28,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:21:28,064 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-04 13:21:28,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:28,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14745845] [2020-09-04 13:21:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:21:28,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14745845] [2020-09-04 13:21:28,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369911742] [2020-09-04 13:21:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:28,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:28,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:28,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:21:28,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:21:28,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:28,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-09-04 13:21:28,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792059384] [2020-09-04 13:21:28,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:21:28,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:28,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:21:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:21:28,360 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-09-04 13:21:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:28,446 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-04 13:21:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:21:28,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-04 13:21:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:28,448 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:21:28,448 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:21:28,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:21:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:21:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:21:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 13:21:28,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-04 13:21:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:28,456 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 13:21:28,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:21:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 13:21:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:21:28,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:28,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:28,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:28,671 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-04 13:21:28,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:28,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922646026] [2020-09-04 13:21:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:21:28,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922646026] [2020-09-04 13:21:28,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001270356] [2020-09-04 13:21:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:21:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:21:28,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:21:28,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:28,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-09-04 13:21:28,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639411211] [2020-09-04 13:21:28,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:21:28,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:21:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:21:28,967 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-09-04 13:21:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:29,046 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 13:21:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:21:29,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-04 13:21:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:29,048 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:21:29,048 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 13:21:29,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 13:21:29,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 13:21:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:21:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:21:29,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-04 13:21:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:29,057 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:21:29,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:21:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:21:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:21:29,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:29,059 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:29,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:29,273 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-04 13:21:29,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:29,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636966900] [2020-09-04 13:21:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:21:29,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636966900] [2020-09-04 13:21:29,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745151168] [2020-09-04 13:21:29,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:29,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:21:29,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:21:29,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:29,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-09-04 13:21:29,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67750287] [2020-09-04 13:21:29,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:21:29,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:21:29,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:21:29,544 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-09-04 13:21:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:29,632 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-04 13:21:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:21:29,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-04 13:21:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:29,634 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:21:29,634 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:21:29,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:21:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:21:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:21:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:21:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 13:21:29,642 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-04 13:21:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:29,643 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 13:21:29,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:21:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 13:21:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:21:29,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:29,645 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:29,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:29,859 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-04 13:21:29,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:29,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089675664] [2020-09-04 13:21:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:29,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:21:30,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089675664] [2020-09-04 13:21:30,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637442182] [2020-09-04 13:21:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:30,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:21:30,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:21:30,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:21:30,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:30,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-09-04 13:21:30,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170371980] [2020-09-04 13:21:30,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:21:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:21:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:30,192 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-09-04 13:21:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:30,299 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-04 13:21:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:21:30,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-09-04 13:21:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:30,301 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:21:30,301 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:21:30,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:21:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:21:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:21:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:21:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:21:30,309 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-04 13:21:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:30,309 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:21:30,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:21:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:21:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:21:30,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:30,312 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:30,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:21:30,526 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-04 13:21:30,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:30,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125119050] [2020-09-04 13:21:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:21:30,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125119050] [2020-09-04 13:21:30,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684203836] [2020-09-04 13:21:30,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:30,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:21:30,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:21:30,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:21:30,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:30,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-09-04 13:21:30,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886558588] [2020-09-04 13:21:30,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:21:30,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:21:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:21:30,899 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-09-04 13:21:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:31,012 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-04 13:21:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:21:31,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-04 13:21:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:31,014 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:21:31,014 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:21:31,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:21:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:21:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:21:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:21:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 13:21:31,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-04 13:21:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:31,022 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 13:21:31,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:21:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 13:21:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:21:31,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:31,024 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:31,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:31,238 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-04 13:21:31,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:31,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102958419] [2020-09-04 13:21:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:21:31,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102958419] [2020-09-04 13:21:31,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588766815] [2020-09-04 13:21:31,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:21:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:21:31,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:31,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-09-04 13:21:31,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730033328] [2020-09-04 13:21:31,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:21:31,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:31,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:21:31,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:31,655 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-09-04 13:21:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:31,777 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 13:21:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:21:31,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-04 13:21:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:31,779 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:21:31,779 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:21:31,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:21:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:21:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:21:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:21:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:21:31,786 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-04 13:21:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:31,787 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:21:31,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:21:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:21:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 13:21:31,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:31,788 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:32,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:32,003 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-04 13:21:32,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:32,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450332607] [2020-09-04 13:21:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:21:32,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450332607] [2020-09-04 13:21:32,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15015035] [2020-09-04 13:21:32,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:32,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:21:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:21:32,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:32,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-09-04 13:21:32,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889356283] [2020-09-04 13:21:32,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:21:32,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:21:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:21:32,410 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-09-04 13:21:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:32,537 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 13:21:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:21:32,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-04 13:21:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:32,539 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:21:32,539 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:21:32,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:21:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:21:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 13:21:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:21:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 13:21:32,547 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-04 13:21:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:32,548 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 13:21:32,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:21:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 13:21:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:21:32,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:32,549 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:32,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:21:32,763 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:32,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-04 13:21:32,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:32,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700968287] [2020-09-04 13:21:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:32,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:21:33,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700968287] [2020-09-04 13:21:33,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168296384] [2020-09-04 13:21:33,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:33,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:21:33,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:33,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-04 13:21:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:21:33,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:33,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-09-04 13:21:33,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111062611] [2020-09-04 13:21:33,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:21:33,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:21:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:21:33,225 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-09-04 13:21:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:33,429 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-04 13:21:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:21:33,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-09-04 13:21:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:33,431 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:21:33,431 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:21:33,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:21:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:21:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 13:21:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:21:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:21:33,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-04 13:21:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:33,439 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:21:33,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:21:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:21:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:21:33,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:33,440 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:33,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:33,656 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:33,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-04 13:21:33,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:33,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505764092] [2020-09-04 13:21:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-04 13:21:34,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505764092] [2020-09-04 13:21:34,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572860024] [2020-09-04 13:21:34,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:34,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:34,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-04 13:21:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-04 13:21:34,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:34,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-09-04 13:21:34,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846810388] [2020-09-04 13:21:34,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:21:34,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:34,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:21:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:21:34,147 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-09-04 13:21:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:34,357 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-09-04 13:21:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:21:34,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 13:21:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:34,359 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:21:34,359 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:21:34,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:21:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:21:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-04 13:21:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:21:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-09-04 13:21:34,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-09-04 13:21:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:34,374 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-09-04 13:21:34,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:21:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-09-04 13:21:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:21:34,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:34,378 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:34,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:34,580 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-09-04 13:21:34,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:34,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475818614] [2020-09-04 13:21:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:34,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-04 13:21:35,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475818614] [2020-09-04 13:21:35,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20271974] [2020-09-04 13:21:35,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:35,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:21:35,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:35,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-04 13:21:35,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-04 13:21:35,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:35,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-09-04 13:21:35,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644611222] [2020-09-04 13:21:35,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:21:35,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:21:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:21:35,200 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-09-04 13:21:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:35,416 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 13:21:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:21:35,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-09-04 13:21:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:35,418 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:21:35,418 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 13:21:35,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-09-04 13:21:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 13:21:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-04 13:21:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:21:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 13:21:35,432 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-09-04 13:21:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:35,432 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 13:21:35,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:21:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 13:21:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 13:21:35,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:35,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:35,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:21:35,639 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-09-04 13:21:35,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:35,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578632187] [2020-09-04 13:21:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-04 13:21:36,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578632187] [2020-09-04 13:21:36,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985201198] [2020-09-04 13:21:36,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:36,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:21:36,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:36,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-04 13:21:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-04 13:21:36,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:36,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-09-04 13:21:36,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275126351] [2020-09-04 13:21:36,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 13:21:36,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 13:21:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:21:36,269 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-09-04 13:21:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:36,477 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-09-04 13:21:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:21:36,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-09-04 13:21:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:36,479 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:21:36,479 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:21:36,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-09-04 13:21:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:21:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 13:21:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:21:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 13:21:36,487 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-09-04 13:21:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:36,487 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 13:21:36,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 13:21:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 13:21:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 13:21:36,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:36,489 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:36,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:21:36,705 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-09-04 13:21:36,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:36,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208013953] [2020-09-04 13:21:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:36,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:21:37,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208013953] [2020-09-04 13:21:37,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813567906] [2020-09-04 13:21:37,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-04 13:21:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:21:37,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:37,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-09-04 13:21:37,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417573416] [2020-09-04 13:21:37,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:21:37,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:21:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:21:37,412 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-09-04 13:21:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:37,676 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-04 13:21:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:21:37,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-09-04 13:21:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:37,679 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:21:37,679 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:21:37,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 13:21:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:21:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 13:21:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:21:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-04 13:21:37,697 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-09-04 13:21:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:37,698 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-04 13:21:37,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:21:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-04 13:21:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 13:21:37,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:37,699 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:37,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:21:37,901 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-09-04 13:21:37,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:37,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343536058] [2020-09-04 13:21:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:37,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-04 13:21:38,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343536058] [2020-09-04 13:21:38,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836941428] [2020-09-04 13:21:38,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:38,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-04 13:21:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-04 13:21:38,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:38,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-04 13:21:38,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803481181] [2020-09-04 13:21:38,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:21:38,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:21:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:21:38,637 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-09-04 13:21:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:38,857 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-04 13:21:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:21:38,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-09-04 13:21:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:38,859 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:21:38,859 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:21:38,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 13:21:38,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:21:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 13:21:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:21:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 13:21:38,873 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-09-04 13:21:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:38,873 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 13:21:38,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:21:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 13:21:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 13:21:38,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:38,877 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:39,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:39,092 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-09-04 13:21:39,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:39,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342862323] [2020-09-04 13:21:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:39,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-09-04 13:21:40,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342862323] [2020-09-04 13:21:40,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839847952] [2020-09-04 13:21:40,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:40,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-04 13:21:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-09-04 13:21:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-09-04 13:21:40,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:40,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-09-04 13:21:40,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275516057] [2020-09-04 13:21:40,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 13:21:40,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 13:21:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 13:21:40,605 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-09-04 13:21:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:41,212 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-04 13:21:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 13:21:41,212 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-09-04 13:21:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:41,213 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:21:41,214 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:21:41,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 13:21:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:21:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-04 13:21:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 13:21:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-04 13:21:41,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-09-04 13:21:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:41,221 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-04 13:21:41,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 13:21:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-04 13:21:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:21:41,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:41,223 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:41,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:21:41,437 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-09-04 13:21:41,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:41,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328867582] [2020-09-04 13:21:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:41,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-09-04 13:21:42,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328867582] [2020-09-04 13:21:42,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683618918] [2020-09-04 13:21:42,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:42,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:21:42,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:42,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-04 13:21:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-09-04 13:21:42,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:21:42,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-09-04 13:21:42,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687261624] [2020-09-04 13:21:42,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:21:42,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:42,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:21:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:21:42,421 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-09-04 13:21:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:42,823 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-09-04 13:21:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 13:21:42,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-09-04 13:21:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:42,824 INFO L225 Difference]: With dead ends: 63 [2020-09-04 13:21:42,825 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:21:42,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 13:21:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:21:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:21:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:21:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:21:42,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-09-04 13:21:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:42,829 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:21:42,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:21:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:21:42,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:21:43,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:21:43,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:21:43,069 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:21:43,069 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:21:43,069 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:21:43,070 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:21:43,070 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:21:43,070 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:21:43,070 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-09-04 13:21:43,070 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-09-04 13:21:43,070 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:21:43,070 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-04 13:21:43,070 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-09-04 13:21:43,071 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2020-09-04 13:21:43,071 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-09-04 13:21:43,071 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:21:43,071 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-09-04 13:21:43,071 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-09-04 13:21:43,071 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-09-04 13:21:43,072 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-09-04 13:21:43,072 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-04 13:21:43,072 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-09-04 13:21:43,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:21:43 BoogieIcfgContainer [2020-09-04 13:21:43,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:21:43,083 INFO L168 Benchmark]: Toolchain (without parser) took 17042.79 ms. Allocated memory was 146.8 MB in the beginning and 396.9 MB in the end (delta: 250.1 MB). Free memory was 101.2 MB in the beginning and 227.3 MB in the end (delta: -126.1 MB). Peak memory consumption was 124.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:43,084 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-04 13:21:43,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.41 ms. Allocated memory is still 146.8 MB. Free memory was 100.8 MB in the beginning and 91.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:43,085 INFO L168 Benchmark]: Boogie Preprocessor took 127.29 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 91.9 MB in the beginning and 181.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:43,085 INFO L168 Benchmark]: RCFGBuilder took 281.71 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 170.2 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:43,086 INFO L168 Benchmark]: TraceAbstraction took 16343.57 ms. Allocated memory was 202.9 MB in the beginning and 396.9 MB in the end (delta: 194.0 MB). Free memory was 170.2 MB in the beginning and 227.3 MB in the end (delta: -57.1 MB). Peak memory consumption was 136.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:43,089 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.41 ms. Allocated memory is still 146.8 MB. Free memory was 100.8 MB in the beginning and 91.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.29 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 91.9 MB in the beginning and 181.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.71 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 170.2 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16343.57 ms. Allocated memory was 202.9 MB in the beginning and 396.9 MB in the end (delta: 194.0 MB). Free memory was 170.2 MB in the beginning and 227.3 MB in the end (delta: -57.1 MB). Peak memory consumption was 136.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.2s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 526 SDslu, 2176 SDs, 0 SdLazy, 1348 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1705 GetRequests, 1334 SyntacticMatches, 1 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 405744 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2400 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...