/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -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 0.1.25-79ed534 [2020-07-19 21:28:19,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:28:19,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:28:19,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:28:19,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:28:19,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:28:19,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:28:19,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:28:19,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:28:19,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:28:19,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:28:19,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:28:19,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:28:19,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:28:19,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:28:19,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:28:19,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:28:19,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:28:19,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:28:19,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:28:19,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:28:19,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:28:19,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:28:19,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:28:19,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:28:19,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:28:19,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:28:19,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:28:19,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:28:19,245 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:28:19,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:28:19,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:28:19,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:28:19,248 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:28:19,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:28:19,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:28:19,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:28:19,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:28:19,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:28:19,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:28:19,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:28:19,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:28:19,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:28:19,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:28:19,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:28:19,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:28:19,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:28:19,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:28:19,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:28:19,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:28:19,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:28:19,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:28:19,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:28:19,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:28:19,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:28:19,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:28:19,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:28:19,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:28:19,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:28:19,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:28:19,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:28:19,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:28:19,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:28:19,579 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:28:19,580 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-19 21:28:19,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713a57cc9/86e58f4a6118470f8ed402692e8fa25f/FLAG4c941a6ab [2020-07-19 21:28:20,129 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:28:20,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-19 21:28:20,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713a57cc9/86e58f4a6118470f8ed402692e8fa25f/FLAG4c941a6ab [2020-07-19 21:28:20,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/713a57cc9/86e58f4a6118470f8ed402692e8fa25f [2020-07-19 21:28:20,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:28:20,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:28:20,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:28:20,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:28:20,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:28:20,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5275884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20, skipping insertion in model container [2020-07-19 21:28:20,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:28:20,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:28:20,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:28:20,793 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:28:20,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:28:20,828 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:28:20,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20 WrapperNode [2020-07-19 21:28:20,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:28:20,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:28:20,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:28:20,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:28:20,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... [2020-07-19 21:28:20,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:28:20,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:28:20,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:28:20,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:28:20,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:28:21,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:28:21,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:28:21,024 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-19 21:28:21,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:28:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:28:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:28:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-19 21:28:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:28:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:28:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:28:21,185 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:28:21,186 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:28:21,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:21 BoogieIcfgContainer [2020-07-19 21:28:21,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:28:21,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:28:21,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:28:21,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:28:21,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:28:20" (1/3) ... [2020-07-19 21:28:21,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ef5a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:21, skipping insertion in model container [2020-07-19 21:28:21,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:20" (2/3) ... [2020-07-19 21:28:21,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ef5a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:21, skipping insertion in model container [2020-07-19 21:28:21,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:21" (3/3) ... [2020-07-19 21:28:21,196 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-07-19 21:28:21,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:28:21,210 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:28:21,224 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:28:21,248 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:28:21,249 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:28:21,249 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:28:21,249 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:28:21,249 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:28:21,249 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:28:21,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:28:21,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:28:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 21:28:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 21:28:21,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:21,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:21,276 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-19 21:28:21,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:21,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211264959] [2020-07-19 21:28:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:28:21,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211264959] [2020-07-19 21:28:21,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:28:21,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:28:21,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157667873] [2020-07-19 21:28:21,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:28:21,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:28:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:28:21,526 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 21:28:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:21,647 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 21:28:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:28:21,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 21:28:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:21,660 INFO L225 Difference]: With dead ends: 30 [2020-07-19 21:28:21,661 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 21:28:21,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:28:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 21:28:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 21:28:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 21:28:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 21:28:21,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 21:28:21,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:21,711 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 21:28:21,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:28:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 21:28:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 21:28:21,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:21,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:21,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:28:21,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-19 21:28:21,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:21,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114746257] [2020-07-19 21:28:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:28:21,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114746257] [2020-07-19 21:28:21,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61848928] [2020-07-19 21:28:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:28:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:28:21,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:21,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 21:28:21,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942500879] [2020-07-19 21:28:21,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:28:21,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:21,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:28:21,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:28:21,991 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-19 21:28:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:22,048 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 21:28:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:28:22,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-19 21:28:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:22,050 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:28:22,051 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 21:28:22,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:28:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 21:28:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 21:28:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:28:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 21:28:22,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 21:28:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:22,060 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 21:28:22,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:28:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 21:28:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:28:22,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:22,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:22,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:28:22,277 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:22,278 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-19 21:28:22,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:22,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944992188] [2020-07-19 21:28:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:28:22,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944992188] [2020-07-19 21:28:22,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432876630] [2020-07-19 21:28:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:28:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:28:22,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:22,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-19 21:28:22,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889280073] [2020-07-19 21:28:22,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:28:22,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:28:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:28:22,510 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-19 21:28:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:22,578 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 21:28:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:28:22,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-19 21:28:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:22,580 INFO L225 Difference]: With dead ends: 28 [2020-07-19 21:28:22,580 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:28:22,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:28:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:28:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 21:28:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 21:28:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 21:28:22,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 21:28:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:22,589 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 21:28:22,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:28:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 21:28:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:28:22,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:22,591 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:22,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:22,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-19 21:28:22,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:22,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742794409] [2020-07-19 21:28:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:28:22,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742794409] [2020-07-19 21:28:22,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894540812] [2020-07-19 21:28:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:28:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:28:23,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:23,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 21:28:23,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695197296] [2020-07-19 21:28:23,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:28:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:28:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:28:23,060 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-19 21:28:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:23,136 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 21:28:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:28:23,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-19 21:28:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:23,138 INFO L225 Difference]: With dead ends: 31 [2020-07-19 21:28:23,138 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 21:28:23,139 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 [2020-07-19 21:28:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 21:28:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 21:28:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:28:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 21:28:23,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 21:28:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:23,146 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 21:28:23,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:28:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 21:28:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:28:23,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:23,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:23,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:23,364 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-19 21:28:23,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:23,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215061136] [2020-07-19 21:28:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 21:28:23,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215061136] [2020-07-19 21:28:23,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424843156] [2020-07-19 21:28:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:28:23,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 21:28:23,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:23,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-19 21:28:23,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098652690] [2020-07-19 21:28:23,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:28:23,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:28:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:28:23,604 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-19 21:28:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:23,689 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 21:28:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:28:23,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-19 21:28:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:23,691 INFO L225 Difference]: With dead ends: 34 [2020-07-19 21:28:23,691 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:28:23,692 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 [2020-07-19 21:28:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:28:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:28:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:28:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 21:28:23,699 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 21:28:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:23,700 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 21:28:23,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:28:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 21:28:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 21:28:23,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:23,702 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:23,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:23,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-19 21:28:23,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:23,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475113833] [2020-07-19 21:28:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 21:28:24,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475113833] [2020-07-19 21:28:24,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885712332] [2020-07-19 21:28:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:28:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 21:28:24,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:24,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-19 21:28:24,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187156209] [2020-07-19 21:28:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:28:24,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:28:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:28:24,191 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-19 21:28:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:24,300 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 21:28:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:28:24,300 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-19 21:28:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:24,302 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:28:24,302 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 21:28:24,303 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 [2020-07-19 21:28:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 21:28:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 21:28:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:28:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 21:28:24,309 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 21:28:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:24,310 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 21:28:24,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:28:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 21:28:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 21:28:24,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:24,312 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:24,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 21:28:24,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-19 21:28:24,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:24,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873331584] [2020-07-19 21:28:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 21:28:24,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873331584] [2020-07-19 21:28:24,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782736444] [2020-07-19 21:28:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:28:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 21:28:24,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:24,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-19 21:28:24,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698005812] [2020-07-19 21:28:24,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:28:24,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:28:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:28:24,895 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-19 21:28:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:24,998 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 21:28:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:28:24,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-19 21:28:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:25,000 INFO L225 Difference]: With dead ends: 40 [2020-07-19 21:28:25,001 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:28:25,001 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 [2020-07-19 21:28:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:28:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 21:28:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:28:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 21:28:25,008 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 21:28:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:25,008 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 21:28:25,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:28:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 21:28:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 21:28:25,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:25,010 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:25,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:25,224 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-19 21:28:25,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:25,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548508471] [2020-07-19 21:28:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 21:28:25,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548508471] [2020-07-19 21:28:25,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481618923] [2020-07-19 21:28:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:28:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 21:28:25,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:25,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-19 21:28:25,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828270794] [2020-07-19 21:28:25,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:28:25,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:25,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:28:25,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:28:25,547 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-19 21:28:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:25,658 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 21:28:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:28:25,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-19 21:28:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:25,659 INFO L225 Difference]: With dead ends: 43 [2020-07-19 21:28:25,660 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 21:28:25,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:28:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 21:28:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 21:28:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:28:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 21:28:25,666 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 21:28:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:25,667 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 21:28:25,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:28:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 21:28:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 21:28:25,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:25,669 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:25,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:25,884 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-19 21:28:25,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:25,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362528752] [2020-07-19 21:28:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 21:28:26,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362528752] [2020-07-19 21:28:26,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025225215] [2020-07-19 21:28:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:28:26,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 21:28:26,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:26,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-19 21:28:26,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294658405] [2020-07-19 21:28:26,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:28:26,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:28:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:28:26,249 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-19 21:28:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:26,397 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 21:28:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:28:26,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-19 21:28:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:26,402 INFO L225 Difference]: With dead ends: 46 [2020-07-19 21:28:26,402 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:28:26,403 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 [2020-07-19 21:28:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:28:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 21:28:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 21:28:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 21:28:26,415 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 21:28:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:26,415 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 21:28:26,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:28:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 21:28:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 21:28:26,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:26,419 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:26,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 21:28:26,634 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:26,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-19 21:28:26,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:26,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404032947] [2020-07-19 21:28:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 21:28:26,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404032947] [2020-07-19 21:28:26,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838213639] [2020-07-19 21:28:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:28:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 21:28:27,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:27,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-19 21:28:27,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935419524] [2020-07-19 21:28:27,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:28:27,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:27,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:28:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:28:27,031 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-19 21:28:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:27,190 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 21:28:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:28:27,191 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-19 21:28:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:27,192 INFO L225 Difference]: With dead ends: 49 [2020-07-19 21:28:27,192 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 21:28:27,193 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 [2020-07-19 21:28:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 21:28:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 21:28:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:28:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 21:28:27,201 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 21:28:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:27,202 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 21:28:27,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:28:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 21:28:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 21:28:27,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:27,204 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:27,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:27,411 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-19 21:28:27,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:27,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394994533] [2020-07-19 21:28:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 21:28:27,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394994533] [2020-07-19 21:28:27,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419864099] [2020-07-19 21:28:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:28:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 21:28:27,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:27,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-19 21:28:27,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88179230] [2020-07-19 21:28:27,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:28:27,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:28:27,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:28:27,859 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-19 21:28:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:28,033 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 21:28:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:28:28,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-19 21:28:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:28,036 INFO L225 Difference]: With dead ends: 52 [2020-07-19 21:28:28,036 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:28:28,037 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 [2020-07-19 21:28:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:28:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 21:28:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:28:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 21:28:28,044 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 21:28:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:28,045 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 21:28:28,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:28:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 21:28:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 21:28:28,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:28,046 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:28,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:28,260 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-19 21:28:28,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:28,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056644844] [2020-07-19 21:28:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 21:28:28,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056644844] [2020-07-19 21:28:28,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327659218] [2020-07-19 21:28:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 21:28:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 21:28:28,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:28,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-19 21:28:28,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463286177] [2020-07-19 21:28:28,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:28:28,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:28:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:28:28,711 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-19 21:28:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:28,911 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 21:28:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:28:28,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-19 21:28:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:28,913 INFO L225 Difference]: With dead ends: 55 [2020-07-19 21:28:28,913 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 21:28:28,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:28:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 21:28:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 21:28:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:28:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 21:28:28,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 21:28:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:28,921 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 21:28:28,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:28:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 21:28:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 21:28:28,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:28,923 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:29,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 21:28:29,136 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-19 21:28:29,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:29,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524391892] [2020-07-19 21:28:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 21:28:29,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524391892] [2020-07-19 21:28:29,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819564116] [2020-07-19 21:28:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 21:28:29,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 21:28:29,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:29,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-19 21:28:29,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210452480] [2020-07-19 21:28:29,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:28:29,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:28:29,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:28:29,784 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-19 21:28:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:29,984 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 21:28:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:28:29,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-19 21:28:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:29,986 INFO L225 Difference]: With dead ends: 58 [2020-07-19 21:28:29,986 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:28:29,987 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 [2020-07-19 21:28:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:28:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 21:28:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 21:28:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 21:28:29,993 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 21:28:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:29,993 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 21:28:29,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:28:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 21:28:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 21:28:29,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:29,994 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:30,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:28:30,207 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:30,208 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-19 21:28:30,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:30,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488876160] [2020-07-19 21:28:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 21:28:30,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488876160] [2020-07-19 21:28:30,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429613060] [2020-07-19 21:28:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 21:28:30,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 21:28:30,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:30,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-19 21:28:30,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008941239] [2020-07-19 21:28:30,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:28:30,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:28:30,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:28:30,759 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-19 21:28:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:30,966 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 21:28:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:28:30,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-19 21:28:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:30,968 INFO L225 Difference]: With dead ends: 61 [2020-07-19 21:28:30,968 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 21:28:30,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:28:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 21:28:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 21:28:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:28:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 21:28:30,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 21:28:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:30,975 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 21:28:30,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:28:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 21:28:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 21:28:30,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:30,977 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:31,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:28:31,190 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-19 21:28:31,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:31,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293592272] [2020-07-19 21:28:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 21:28:31,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293592272] [2020-07-19 21:28:31,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992553809] [2020-07-19 21:28:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:28:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 21:28:31,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:31,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-19 21:28:31,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965798603] [2020-07-19 21:28:31,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:28:31,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:31,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:28:31,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:28:31,867 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-19 21:28:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:32,086 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 21:28:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:28:32,087 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-19 21:28:32,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:32,088 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:28:32,089 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 21:28:32,090 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 [2020-07-19 21:28:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 21:28:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 21:28:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 21:28:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 21:28:32,106 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 21:28:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:32,107 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 21:28:32,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:28:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 21:28:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 21:28:32,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:32,111 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:32,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:32,312 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-19 21:28:32,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:32,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678411382] [2020-07-19 21:28:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 21:28:33,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678411382] [2020-07-19 21:28:33,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416332395] [2020-07-19 21:28:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-19 21:28:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 21:28:33,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:33,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-07-19 21:28:33,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115750590] [2020-07-19 21:28:33,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 21:28:33,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 21:28:33,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:28:33,745 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-07-19 21:28:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:34,227 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-19 21:28:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 21:28:34,228 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-07-19 21:28:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:34,229 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:28:34,229 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 21:28:34,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:28:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 21:28:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-19 21:28:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:28:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-19 21:28:34,235 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-19 21:28:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:34,236 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-19 21:28:34,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 21:28:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-19 21:28:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 21:28:34,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:34,238 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:34,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 21:28:34,450 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-19 21:28:34,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:34,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366572786] [2020-07-19 21:28:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 [2020-07-19 21:28:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 21:28:35,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366572786] [2020-07-19 21:28:35,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953198331] [2020-07-19 21:28:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bfab806 No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 21:28:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 21:28:35,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 21:28:35,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:28:35,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-07-19 21:28:35,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926166569] [2020-07-19 21:28:35,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:28:35,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:28:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:28:35,296 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-07-19 21:28:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:35,642 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-07-19 21:28:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:28:35,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-07-19 21:28:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:35,643 INFO L225 Difference]: With dead ends: 63 [2020-07-19 21:28:35,643 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:28:35,644 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 [2020-07-19 21:28:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:28:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:28:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:28:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:28:35,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-07-19 21:28:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:35,646 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:28:35,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:28:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:28:35,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:28:35,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:28:35,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:28:35,884 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:28:35,884 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:28:35,884 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:28:35,884 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:28:35,885 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:28:35,885 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:28:35,885 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-19 21:28:35,885 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-19 21:28:35,885 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-19 21:28:35,885 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-19 21:28:35,885 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-19 21:28:35,886 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 15 main_~input~0) (<= main_~input~0 15)) [2020-07-19 21:28:35,886 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-19 21:28:35,886 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-19 21:28:35,886 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-19 21:28:35,886 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-19 21:28:35,887 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-19 21:28:35,887 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-19 21:28:35,887 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 21:28:35,887 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-19 21:28:35,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:28:35 BoogieIcfgContainer [2020-07-19 21:28:35,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:28:35,896 INFO L168 Benchmark]: Toolchain (without parser) took 15375.99 ms. Allocated memory was 146.3 MB in the beginning and 395.3 MB in the end (delta: 249.0 MB). Free memory was 103.1 MB in the beginning and 269.2 MB in the end (delta: -166.1 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:35,897 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 21:28:35,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.47 ms. Allocated memory is still 146.3 MB. Free memory was 102.7 MB in the beginning and 93.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:35,898 INFO L168 Benchmark]: Boogie Preprocessor took 31.31 ms. Allocated memory is still 146.3 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:35,899 INFO L168 Benchmark]: RCFGBuilder took 324.98 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 171.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:35,899 INFO L168 Benchmark]: TraceAbstraction took 14703.59 ms. Allocated memory was 203.4 MB in the beginning and 395.3 MB in the end (delta: 191.9 MB). Free memory was 171.7 MB in the beginning and 269.2 MB in the end (delta: -97.5 MB). Peak memory consumption was 94.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:35,902 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.47 ms. Allocated memory is still 146.3 MB. Free memory was 102.7 MB in the beginning and 93.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.31 ms. Allocated memory is still 146.3 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.98 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 171.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14703.59 ms. Allocated memory was 203.4 MB in the beginning and 395.3 MB in the end (delta: 191.9 MB). Free memory was 171.7 MB in the beginning and 269.2 MB in the end (delta: -97.5 MB). Peak memory consumption was 94.4 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: 14.6s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 2.9s, 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, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1705 GetRequests, 1331 SyntacticMatches, 4 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.3s 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: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 407376 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...