/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_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:10:29,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:10:29,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:10:29,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:10:29,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:10:29,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:10:29,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:10:29,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:10:29,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:10:29,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:10:29,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:10:29,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:10:29,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:10:29,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:10:29,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:10:29,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:10:29,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:10:29,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:10:29,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:10:29,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:10:29,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:10:29,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:10:29,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:10:29,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:10:29,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:10:29,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:10:29,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:10:29,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:10:29,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:10:29,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:10:29,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:10:29,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:10:29,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:10:29,855 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:10:29,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:10:29,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:10:29,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:10:29,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:10:29,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:10:29,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:10:29,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:10:29,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:10:29,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:10:29,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:10:29,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:10:29,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:10:29,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:10:29,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:10:29,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:10:29,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:10:29,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:10:29,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:10:29,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:10:29,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:10:29,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:10:29,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:10:29,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:10:29,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:10:29,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:10:30,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:10:30,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:10:30,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:10:30,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:10:30,234 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:10:30,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-07 11:10:30,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05ab6ecbf/0a346c6e82b649bca4fe13aeb1d15017/FLAG712475654 [2020-07-07 11:10:30,823 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:10:30,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-07 11:10:30,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05ab6ecbf/0a346c6e82b649bca4fe13aeb1d15017/FLAG712475654 [2020-07-07 11:10:31,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05ab6ecbf/0a346c6e82b649bca4fe13aeb1d15017 [2020-07-07 11:10:31,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:10:31,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:10:31,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:10:31,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:10:31,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:10:31,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee8142b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31, skipping insertion in model container [2020-07-07 11:10:31,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:10:31,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:10:31,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:10:31,416 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:10:31,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:10:31,450 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:10:31,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31 WrapperNode [2020-07-07 11:10:31,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:10:31,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:10:31,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:10:31,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:10:31,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... [2020-07-07 11:10:31,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:10:31,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:10:31,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:10:31,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:10:31,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:10:31,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:10:31,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:10:31,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 11:10:31,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 11:10:31,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:10:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:10:31,863 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:10:31,864 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:10:31,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:10:31 BoogieIcfgContainer [2020-07-07 11:10:31,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:10:31,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:10:31,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:10:31,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:10:31,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:10:31" (1/3) ... [2020-07-07 11:10:31,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5853f752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:10:31, skipping insertion in model container [2020-07-07 11:10:31,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:10:31" (2/3) ... [2020-07-07 11:10:31,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5853f752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:10:31, skipping insertion in model container [2020-07-07 11:10:31,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:10:31" (3/3) ... [2020-07-07 11:10:31,879 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-07 11:10:31,891 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:10:31,900 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:10:31,935 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:10:32,001 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:10:32,002 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:10:32,002 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:10:32,003 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:10:32,003 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:10:32,003 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:10:32,003 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:10:32,003 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:10:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-07 11:10:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:10:32,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:32,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:32,036 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:32,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-07 11:10:32,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:32,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575360229] [2020-07-07 11:10:32,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:10:32,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575360229] [2020-07-07 11:10:32,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:10:32,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:10:32,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123815219] [2020-07-07 11:10:32,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:10:32,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:10:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:10:32,284 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-07 11:10:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:32,393 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-07 11:10:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:10:32,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:10:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:32,407 INFO L225 Difference]: With dead ends: 44 [2020-07-07 11:10:32,408 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:10:32,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:10:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:10:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:10:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:10:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-07 11:10:32,459 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-07 11:10:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:32,460 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-07 11:10:32,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:10:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-07 11:10:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:10:32,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:32,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:32,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:10:32,463 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-07 11:10:32,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:32,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275403391] [2020-07-07 11:10:32,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:10:32,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275403391] [2020-07-07 11:10:32,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:10:32,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:10:32,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764922604] [2020-07-07 11:10:32,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:10:32,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:10:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:10:32,537 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-07 11:10:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:32,616 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-07 11:10:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:10:32,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-07 11:10:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:32,619 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:10:32,619 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 11:10:32,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:10:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 11:10:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-07 11:10:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:10:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-07 11:10:32,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-07 11:10:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:32,631 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-07 11:10:32,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:10:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-07 11:10:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:10:32,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:32,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:32,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:10:32,634 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-07 11:10:32,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:32,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397149286] [2020-07-07 11:10:32,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:32,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397149286] [2020-07-07 11:10:32,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888709256] [2020-07-07 11:10:32,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:32,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:10:32,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:32,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:32,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-07 11:10:32,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253659688] [2020-07-07 11:10:32,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:10:32,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:10:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:10:32,935 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-07 11:10:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:33,164 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-07 11:10:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:10:33,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-07 11:10:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:33,166 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:10:33,166 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 11:10:33,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:10:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 11:10:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-07 11:10:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:10:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-07 11:10:33,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-07 11:10:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:33,178 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-07 11:10:33,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:10:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-07 11:10:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:10:33,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:33,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:33,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:10:33,396 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-07 11:10:33,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:33,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76887825] [2020-07-07 11:10:33,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:33,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76887825] [2020-07-07 11:10:33,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243948030] [2020-07-07 11:10:33,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:33,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:10:33,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:10:33,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:33,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-07-07 11:10:33,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399163923] [2020-07-07 11:10:33,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:10:33,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:10:33,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:10:33,596 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-07-07 11:10:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:33,780 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-07 11:10:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:10:33,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-07 11:10:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:33,784 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:10:33,785 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:10:33,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:10:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:10:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-07 11:10:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:10:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-07 11:10:33,798 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-07 11:10:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:33,799 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-07 11:10:33,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:10:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-07 11:10:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 11:10:33,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:33,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:34,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:34,016 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:34,016 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-07 11:10:34,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:34,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240373787] [2020-07-07 11:10:34,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:10:34,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240373787] [2020-07-07 11:10:34,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703194859] [2020-07-07 11:10:34,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:34,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:10:34,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:34,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-07 11:10:34,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491013721] [2020-07-07 11:10:34,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:10:34,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:34,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:10:34,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:10:34,311 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-07 11:10:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:34,615 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-07 11:10:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:10:34,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-07 11:10:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:34,619 INFO L225 Difference]: With dead ends: 108 [2020-07-07 11:10:34,620 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:10:34,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:10:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:10:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:10:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:10:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-07 11:10:34,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-07 11:10:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:34,638 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-07 11:10:34,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:10:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-07 11:10:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:10:34,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:34,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:34,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:34,856 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:34,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-07 11:10:34,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:34,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724268826] [2020-07-07 11:10:34,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 11:10:35,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724268826] [2020-07-07 11:10:35,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836935099] [2020-07-07 11:10:35,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:35,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:10:35,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:35,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-07 11:10:35,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797604255] [2020-07-07 11:10:35,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:10:35,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:35,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:10:35,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:10:35,133 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 14 states. [2020-07-07 11:10:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:35,516 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-07 11:10:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:10:35,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-07-07 11:10:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:35,521 INFO L225 Difference]: With dead ends: 180 [2020-07-07 11:10:35,521 INFO L226 Difference]: Without dead ends: 120 [2020-07-07 11:10:35,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:10:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-07 11:10:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-07 11:10:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-07 11:10:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-07 11:10:35,552 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-07 11:10:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:35,552 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-07 11:10:35,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:10:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-07 11:10:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 11:10:35,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:35,557 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:35,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:35,770 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-07 11:10:35,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:35,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924860711] [2020-07-07 11:10:35,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-07 11:10:35,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924860711] [2020-07-07 11:10:35,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351869290] [2020-07-07 11:10:35,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:35,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:10:35,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-07 11:10:36,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:36,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-07-07 11:10:36,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146196656] [2020-07-07 11:10:36,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:10:36,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:10:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:10:36,038 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 13 states. [2020-07-07 11:10:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:36,402 INFO L93 Difference]: Finished difference Result 265 states and 511 transitions. [2020-07-07 11:10:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:10:36,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-07 11:10:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:36,408 INFO L225 Difference]: With dead ends: 265 [2020-07-07 11:10:36,409 INFO L226 Difference]: Without dead ends: 165 [2020-07-07 11:10:36,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:10:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-07 11:10:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-07-07 11:10:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-07 11:10:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2020-07-07 11:10:36,443 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2020-07-07 11:10:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:36,443 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2020-07-07 11:10:36,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:10:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2020-07-07 11:10:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:10:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:36,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:36,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:10:36,663 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-07 11:10:36,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:36,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005046997] [2020-07-07 11:10:36,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-07 11:10:36,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005046997] [2020-07-07 11:10:36,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698508964] [2020-07-07 11:10:36,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:36,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:10:36,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-07 11:10:36,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:36,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2020-07-07 11:10:36,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814024950] [2020-07-07 11:10:36,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:10:36,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:10:36,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:10:36,940 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand 15 states. [2020-07-07 11:10:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:37,331 INFO L93 Difference]: Finished difference Result 304 states and 583 transitions. [2020-07-07 11:10:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:10:37,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-07-07 11:10:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:37,337 INFO L225 Difference]: With dead ends: 304 [2020-07-07 11:10:37,338 INFO L226 Difference]: Without dead ends: 101 [2020-07-07 11:10:37,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:10:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-07 11:10:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-07-07 11:10:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-07 11:10:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-07-07 11:10:37,378 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 55 [2020-07-07 11:10:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:37,379 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-07-07 11:10:37,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:10:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-07-07 11:10:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-07 11:10:37,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:37,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:37,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:37,596 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-07 11:10:37,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:37,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743342787] [2020-07-07 11:10:37,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-07 11:10:37,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743342787] [2020-07-07 11:10:37,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005786159] [2020-07-07 11:10:37,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:37,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:10:37,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:10:37,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:10:38,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-07 11:10:38,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:38,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2020-07-07 11:10:38,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197419465] [2020-07-07 11:10:38,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:10:38,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:38,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:10:38,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:10:38,122 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 20 states. [2020-07-07 11:10:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:38,711 INFO L93 Difference]: Finished difference Result 182 states and 307 transitions. [2020-07-07 11:10:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:10:38,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-07-07 11:10:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:38,714 INFO L225 Difference]: With dead ends: 182 [2020-07-07 11:10:38,714 INFO L226 Difference]: Without dead ends: 92 [2020-07-07 11:10:38,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-07-07 11:10:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-07 11:10:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-07-07 11:10:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-07 11:10:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2020-07-07 11:10:38,741 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 82 [2020-07-07 11:10:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:38,741 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2020-07-07 11:10:38,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:10:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2020-07-07 11:10:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-07 11:10:38,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:38,744 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:38,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:38,958 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-07-07 11:10:38,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:38,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586453798] [2020-07-07 11:10:38,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-07 11:10:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586453798] [2020-07-07 11:10:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489108948] [2020-07-07 11:10:39,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:39,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-07 11:10:39,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-07 11:10:39,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:39,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-07 11:10:39,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121245168] [2020-07-07 11:10:39,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:10:39,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:10:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:10:39,644 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand 21 states. [2020-07-07 11:10:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:39,817 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2020-07-07 11:10:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:10:39,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-07 11:10:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:39,820 INFO L225 Difference]: With dead ends: 94 [2020-07-07 11:10:39,820 INFO L226 Difference]: Without dead ends: 90 [2020-07-07 11:10:39,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:10:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-07 11:10:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-07-07 11:10:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-07 11:10:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-07-07 11:10:39,848 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 68 [2020-07-07 11:10:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:39,849 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-07-07 11:10:39,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:10:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-07-07 11:10:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-07 11:10:39,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:10:39,852 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:10:40,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-07 11:10:40,053 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:10:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:10:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-07 11:10:40,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:10:40,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081194557] [2020-07-07 11:10:40,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:10:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-07 11:10:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081194557] [2020-07-07 11:10:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284160860] [2020-07-07 11:10:40,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:10:40,304 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:10:40,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:10:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-07 11:10:40,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:10:40,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2020-07-07 11:10:40,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919473362] [2020-07-07 11:10:40,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:10:40,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:10:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:10:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:10:40,394 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 17 states. [2020-07-07 11:10:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:10:40,697 INFO L93 Difference]: Finished difference Result 149 states and 207 transitions. [2020-07-07 11:10:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:10:40,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-07 11:10:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:10:40,698 INFO L225 Difference]: With dead ends: 149 [2020-07-07 11:10:40,699 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:10:40,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:10:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:10:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:10:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:10:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:10:40,702 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2020-07-07 11:10:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:10:40,702 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:10:40,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:10:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:10:40,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:10:40,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:10:40,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:10:41,575 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 14 [2020-07-07 11:10:41,786 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-07-07 11:10:41,790 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:10:41,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:10:41,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:10:41,790 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:10:41,790 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:10:41,791 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:10:41,791 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-07 11:10:41,791 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-07 11:10:41,791 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-07 11:10:41,791 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-07 11:10:41,791 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-07 11:10:41,792 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-07 11:10:41,792 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-07 11:10:41,792 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-07 11:10:41,792 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-07 11:10:41,792 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-07 11:10:41,793 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-07-07 11:10:41,793 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-07 11:10:41,793 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse0 (<= 4 fibo2_~n)) (and (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|) .cse0))) (< 1 fibo2_~n)) [2020-07-07 11:10:41,794 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-07 11:10:41,794 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-07 11:10:41,794 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-07 11:10:41,794 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-07 11:10:41,794 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-07 11:10:41,794 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-07 11:10:41,795 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-07 11:10:41,795 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-07 11:10:41,795 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse2 (= fibo1_~n |fibo1_#in~n|))) (let ((.cse0 (and (<= |fibo1_#t~ret0| 2) (<= 4 fibo1_~n) (<= 2 |fibo1_#t~ret0|) .cse2)) (.cse1 (and (<= 5 |fibo1_#in~n|) .cse2))) (and (not (<= |fibo1_#in~n| 2)) (or .cse0 .cse1 (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1))) (or .cse0 .cse1 (and .cse2 (<= |fibo1_#in~n| 3)))))) [2020-07-07 11:10:41,795 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-07 11:10:41,795 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-07 11:10:41,796 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-07 11:10:41,796 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-07 11:10:41,796 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-07 11:10:41,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:10:41 BoogieIcfgContainer [2020-07-07 11:10:41,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:10:41,804 INFO L168 Benchmark]: Toolchain (without parser) took 10605.15 ms. Allocated memory was 145.8 MB in the beginning and 305.1 MB in the end (delta: 159.4 MB). Free memory was 104.1 MB in the beginning and 167.3 MB in the end (delta: -63.2 MB). Peak memory consumption was 168.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:10:41,805 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:10:41,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.06 ms. Allocated memory is still 145.8 MB. Free memory was 103.9 MB in the beginning and 94.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:10:41,806 INFO L168 Benchmark]: Boogie Preprocessor took 32.05 ms. Allocated memory is still 145.8 MB. Free memory was 94.2 MB in the beginning and 92.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:10:41,807 INFO L168 Benchmark]: RCFGBuilder took 384.68 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.9 MB in the beginning and 169.3 MB in the end (delta: -76.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:10:41,808 INFO L168 Benchmark]: TraceAbstraction took 9931.15 ms. Allocated memory was 202.9 MB in the beginning and 305.1 MB in the end (delta: 102.2 MB). Free memory was 168.3 MB in the beginning and 167.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 175.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:10:41,811 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.06 ms. Allocated memory is still 145.8 MB. Free memory was 103.9 MB in the beginning and 94.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.05 ms. Allocated memory is still 145.8 MB. Free memory was 94.2 MB in the beginning and 92.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.68 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.9 MB in the beginning and 169.3 MB in the end (delta: -76.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9931.15 ms. Allocated memory was 202.9 MB in the beginning and 305.1 MB in the end (delta: 102.2 MB). Free memory was 168.3 MB in the beginning and 167.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 175.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.9s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 338 SDtfs, 412 SDslu, 2279 SDs, 0 SdLazy, 2289 SolverSat, 371 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 789 GetRequests, 616 SyntacticMatches, 5 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 82 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 404 PreInvPairs, 485 NumberOfFragments, 111 HoareAnnotationTreeSize, 404 FomulaSimplifications, 684 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1094 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 973 NumberOfCodeBlocks, 973 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 127421 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1060 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 680/968 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...