/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:20:38,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:20:38,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:20:38,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:20:38,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:20:38,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:20:38,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:20:38,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:20:38,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:20:38,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:20:38,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:20:38,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:20:38,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:20:38,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:20:38,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:20:38,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:20:38,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:20:38,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:20:38,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:20:38,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:20:38,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:20:38,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:20:38,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:20:38,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:20:38,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:20:38,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:20:38,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:20:38,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:20:38,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:20:38,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:20:38,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:20:38,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:20:38,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:20:38,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:20:38,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:20:38,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:20:38,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:20:38,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:20:38,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:20:38,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:20:38,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:20:38,660 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:20:38,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:20:38,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:20:38,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:20:38,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:20:38,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:20:38,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:20:38,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:20:38,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:20:38,663 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:20:38,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:20:38,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:20:38,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:20:38,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:20:38,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:20:38,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:20:38,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:20:38,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:20:38,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:20:38,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:20:38,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:20:38,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:20:38,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:20:38,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:20:38,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:20:38,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:20:39,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:20:39,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:20:39,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:20:39,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:20:39,165 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:20:39,167 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-09-04 13:20:39,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6618b870e/d0067fbe9cd94770b87d23e76128f6b4/FLAG81c6bbecd [2020-09-04 13:20:39,885 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:20:39,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-09-04 13:20:39,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6618b870e/d0067fbe9cd94770b87d23e76128f6b4/FLAG81c6bbecd [2020-09-04 13:20:40,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6618b870e/d0067fbe9cd94770b87d23e76128f6b4 [2020-09-04 13:20:40,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:20:40,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:20:40,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:20:40,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:20:40,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:20:40,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9132f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40, skipping insertion in model container [2020-09-04 13:20:40,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:20:40,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:20:40,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:20:40,544 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:20:40,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:20:40,580 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:20:40,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40 WrapperNode [2020-09-04 13:20:40,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:20:40,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:20:40,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:20:40,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:20:40,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... [2020-09-04 13:20:40,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:20:40,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:20:40,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:20:40,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:20:40,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:20:40,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:20:40,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:20:40,784 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-04 13:20:40,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:20:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:20:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:20:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-04 13:20:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:20:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:20:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:20:41,003 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:20:41,004 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:20:41,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:20:41 BoogieIcfgContainer [2020-09-04 13:20:41,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:20:41,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:20:41,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:20:41,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:20:41,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:20:40" (1/3) ... [2020-09-04 13:20:41,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d66baa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:20:41, skipping insertion in model container [2020-09-04 13:20:41,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:20:40" (2/3) ... [2020-09-04 13:20:41,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d66baa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:20:41, skipping insertion in model container [2020-09-04 13:20:41,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:20:41" (3/3) ... [2020-09-04 13:20:41,022 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-09-04 13:20:41,036 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:20:41,048 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:20:41,109 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:20:41,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:20:41,192 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:20:41,192 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:20:41,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:20:41,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:20:41,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:20:41,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:20:41,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:20:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 13:20:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:20:41,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:41,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:41,227 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:41,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:41,234 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-09-04 13:20:41,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:41,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140300873] [2020-09-04 13:20:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:41,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:20:41,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140300873] [2020-09-04 13:20:41,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:20:41,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:20:41,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469268719] [2020-09-04 13:20:41,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:20:41,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:20:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:20:41,532 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-04 13:20:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:41,648 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-09-04 13:20:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:20:41,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:20:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:41,665 INFO L225 Difference]: With dead ends: 35 [2020-09-04 13:20:41,665 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:20:41,670 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 [2020-09-04 13:20:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:20:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:20:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:20:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-09-04 13:20:41,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-09-04 13:20:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:41,738 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-09-04 13:20:41,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:20:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-09-04 13:20:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:20:41,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:41,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:41,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:20:41,742 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:41,743 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-09-04 13:20:41,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:41,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124309076] [2020-09-04 13:20:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:41,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:41,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:20:41,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124309076] [2020-09-04 13:20:41,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:20:41,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:20:41,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045756653] [2020-09-04 13:20:41,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:20:41,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:20:41,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:20:41,868 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-09-04 13:20:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:41,948 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-09-04 13:20:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:20:41,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:20:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:41,951 INFO L225 Difference]: With dead ends: 27 [2020-09-04 13:20:41,951 INFO L226 Difference]: Without dead ends: 23 [2020-09-04 13:20:41,952 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 [2020-09-04 13:20:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-04 13:20:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-09-04 13:20:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:20:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-09-04 13:20:41,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-09-04 13:20:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:41,962 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-09-04 13:20:41,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:20:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-09-04 13:20:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:20:41,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:41,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:41,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:20:41,965 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:41,966 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-09-04 13:20:41,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:41,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673643552] [2020-09-04 13:20:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:20:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:20:42,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673643552] [2020-09-04 13:20:42,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617282257] [2020-09-04 13:20:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:20:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:20:42,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:42,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-09-04 13:20:42,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695884768] [2020-09-04 13:20:42,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:20:42,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:20:42,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:20:42,410 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-09-04 13:20:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:42,569 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-09-04 13:20:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:20:42,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-04 13:20:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:42,572 INFO L225 Difference]: With dead ends: 38 [2020-09-04 13:20:42,574 INFO L226 Difference]: Without dead ends: 23 [2020-09-04 13:20:42,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:20:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-04 13:20:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-04 13:20:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 13:20:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-04 13:20:42,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-09-04 13:20:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:42,591 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-04 13:20:42,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:20:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-04 13:20:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:20:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:42,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:20:42,812 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:42,813 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-09-04 13:20:42,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:42,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398842158] [2020-09-04 13:20:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:20:42,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398842158] [2020-09-04 13:20:42,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175372833] [2020-09-04 13:20:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:20:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:20:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:20:43,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:43,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-04 13:20:43,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719643615] [2020-09-04 13:20:43,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:20:43,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:20:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:20:43,042 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-09-04 13:20:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:43,154 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-09-04 13:20:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:20:43,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-04 13:20:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:43,158 INFO L225 Difference]: With dead ends: 41 [2020-09-04 13:20:43,158 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 13:20:43,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:20:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 13:20:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-04 13:20:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:20:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-09-04 13:20:43,171 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-09-04 13:20:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:43,172 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-09-04 13:20:43,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:20:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-09-04 13:20:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 13:20:43,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:43,174 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:43,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:43,389 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:43,390 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-09-04 13:20:43,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:43,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53676629] [2020-09-04 13:20:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-04 13:20:43,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53676629] [2020-09-04 13:20:43,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704662201] [2020-09-04 13:20:43,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:43,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:20:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:20:43,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:20:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-04 13:20:43,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:43,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-09-04 13:20:43,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027634891] [2020-09-04 13:20:43,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:20:43,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:43,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:20:43,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:20:43,778 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-09-04 13:20:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:44,077 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2020-09-04 13:20:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:20:44,078 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-09-04 13:20:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:44,086 INFO L225 Difference]: With dead ends: 72 [2020-09-04 13:20:44,086 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 13:20:44,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:20:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 13:20:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-04 13:20:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 13:20:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-09-04 13:20:44,115 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 40 [2020-09-04 13:20:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:44,119 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-09-04 13:20:44,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:20:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-09-04 13:20:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 13:20:44,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:44,124 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:44,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:44,340 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:44,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2020-09-04 13:20:44,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:44,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527590319] [2020-09-04 13:20:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:20:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-04 13:20:44,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527590319] [2020-09-04 13:20:44,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759327745] [2020-09-04 13:20:44,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:44,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-04 13:20:44,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:20:44,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:20:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-04 13:20:44,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:44,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-09-04 13:20:44,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565350274] [2020-09-04 13:20:44,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:20:44,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:20:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:20:44,738 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-09-04 13:20:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:44,976 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2020-09-04 13:20:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:20:44,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-09-04 13:20:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:44,982 INFO L225 Difference]: With dead ends: 88 [2020-09-04 13:20:44,982 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 13:20:44,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:20:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 13:20:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-09-04 13:20:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 13:20:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-09-04 13:20:45,005 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 68 [2020-09-04 13:20:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:45,006 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-09-04 13:20:45,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:20:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-09-04 13:20:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-04 13:20:45,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:45,011 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:45,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:45,216 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash -19418837, now seen corresponding path program 4 times [2020-09-04 13:20:45,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:45,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406363813] [2020-09-04 13:20:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:20:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:20:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:20:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 183 proven. 243 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-09-04 13:20:45,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406363813] [2020-09-04 13:20:45,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194502809] [2020-09-04 13:20:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:45,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:20:45,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:20:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:20:45,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 264 proven. 67 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-09-04 13:20:45,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:45,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 16 [2020-09-04 13:20:45,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806469818] [2020-09-04 13:20:45,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:20:45,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:45,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:20:45,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:20:45,935 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 16 states. [2020-09-04 13:20:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:46,608 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2020-09-04 13:20:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:20:46,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-09-04 13:20:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:46,613 INFO L225 Difference]: With dead ends: 120 [2020-09-04 13:20:46,614 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:20:46,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-09-04 13:20:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:20:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-09-04 13:20:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 13:20:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-09-04 13:20:46,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 123 [2020-09-04 13:20:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:46,628 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-09-04 13:20:46,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:20:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-09-04 13:20:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:20:46,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:46,631 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:46,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:20:46,842 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-09-04 13:20:46,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:46,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134541896] [2020-09-04 13:20:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:46,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:20:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:20:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-09-04 13:20:47,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134541896] [2020-09-04 13:20:47,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637435997] [2020-09-04 13:20:47,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:47,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-04 13:20:47,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:20:47,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-09-04 13:20:47,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-09-04 13:20:47,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:47,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-09-04 13:20:47,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105159963] [2020-09-04 13:20:48,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:20:48,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:20:48,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:20:48,001 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 20 states. [2020-09-04 13:20:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:48,205 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-09-04 13:20:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:20:48,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-09-04 13:20:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:48,208 INFO L225 Difference]: With dead ends: 72 [2020-09-04 13:20:48,209 INFO L226 Difference]: Without dead ends: 68 [2020-09-04 13:20:48,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 147 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:20:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-04 13:20:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-04 13:20:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 13:20:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-09-04 13:20:48,222 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 109 [2020-09-04 13:20:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:48,222 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-09-04 13:20:48,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:20:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-09-04 13:20:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 13:20:48,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:20:48,225 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:20:48,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:48,441 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:20:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:20:48,442 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 6 times [2020-09-04 13:20:48,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:20:48,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603115336] [2020-09-04 13:20:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:20:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:20:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:20:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:20:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:20:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-04 13:20:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:20:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:20:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:20:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:20:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 204 proven. 219 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-09-04 13:20:48,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603115336] [2020-09-04 13:20:48,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291366978] [2020-09-04 13:20:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:48,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-09-04 13:20:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:20:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:20:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:20:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-09-04 13:20:49,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:20:49,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-09-04 13:20:49,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363122987] [2020-09-04 13:20:49,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:20:49,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:20:49,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:20:49,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:20:49,124 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 15 states. [2020-09-04 13:20:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:20:49,476 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2020-09-04 13:20:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:20:49,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 136 [2020-09-04 13:20:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:20:49,479 INFO L225 Difference]: With dead ends: 127 [2020-09-04 13:20:49,479 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:20:49,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:20:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:20:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:20:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:20:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:20:49,482 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-09-04 13:20:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:20:49,482 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:20:49,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:20:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:20:49,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:20:49,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:20:49,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:20:50,349 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2020-09-04 13:20:50,427 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:20:50,428 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:20:50,428 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:20:50,428 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:20:50,428 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:20:50,428 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:20:50,428 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-09-04 13:20:50,429 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-09-04 13:20:50,429 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-04 13:20:50,429 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-09-04 13:20:50,430 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-09-04 13:20:50,431 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-09-04 13:20:50,431 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-09-04 13:20:50,431 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-09-04 13:20:50,431 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-09-04 13:20:50,431 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-09-04 13:20:50,431 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-09-04 13:20:50,431 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 2 |fibo_#in~n|) (= fibo_~n |fibo_#in~n|)) [2020-09-04 13:20:50,432 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-09-04 13:20:50,432 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (or (<= |fibo_#in~n| 4) (<= 6 |fibo_#in~n|) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3))) (or (<= 5 |fibo_#in~n|) (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3)) (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) (<= 4 |fibo_#in~n|))) (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-09-04 13:20:50,432 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-09-04 13:20:50,432 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-09-04 13:20:50,432 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-09-04 13:20:50,432 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-09-04 13:20:50,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:20:50 BoogieIcfgContainer [2020-09-04 13:20:50,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:20:50,444 INFO L168 Benchmark]: Toolchain (without parser) took 10196.56 ms. Allocated memory was 139.5 MB in the beginning and 312.5 MB in the end (delta: 173.0 MB). Free memory was 101.3 MB in the beginning and 268.0 MB in the end (delta: -166.7 MB). Peak memory consumption was 180.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:20:50,451 INFO L168 Benchmark]: CDTParser took 2.82 ms. Allocated memory is still 139.5 MB. Free memory was 119.8 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-04 13:20:50,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.17 ms. Allocated memory is still 139.5 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:20:50,454 INFO L168 Benchmark]: Boogie Preprocessor took 32.56 ms. Allocated memory is still 139.5 MB. Free memory was 92.1 MB in the beginning and 90.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:20:50,455 INFO L168 Benchmark]: RCFGBuilder took 395.69 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.3 MB in the beginning and 170.5 MB in the end (delta: -80.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:20:50,462 INFO L168 Benchmark]: TraceAbstraction took 9429.38 ms. Allocated memory was 202.4 MB in the beginning and 312.5 MB in the end (delta: 110.1 MB). Free memory was 169.5 MB in the beginning and 268.0 MB in the end (delta: -98.5 MB). Peak memory consumption was 185.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:20:50,470 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.82 ms. Allocated memory is still 139.5 MB. Free memory was 119.8 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.17 ms. Allocated memory is still 139.5 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.56 ms. Allocated memory is still 139.5 MB. Free memory was 92.1 MB in the beginning and 90.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.69 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.3 MB in the beginning and 170.5 MB in the end (delta: -80.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9429.38 ms. Allocated memory was 202.4 MB in the beginning and 312.5 MB in the end (delta: 110.1 MB). Free memory was 169.5 MB in the beginning and 268.0 MB in the end (delta: -98.5 MB). Peak memory consumption was 185.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.5s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 244 SDslu, 929 SDs, 0 SdLazy, 1109 SolverSat, 189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 829 GetRequests, 696 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, 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, 9 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 128 PreInvPairs, 191 NumberOfFragments, 65 HoareAnnotationTreeSize, 128 FomulaSimplifications, 486 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 850 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 1085 NumberOfCodeBlocks, 1045 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1069 ConstructedInterpolants, 0 QuantifiedInterpolants, 238815 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1078 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 3662/5022 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...