/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:11:42,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:11:42,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:11:42,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:11:42,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:11:42,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:11:42,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:11:42,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:11:42,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:11:42,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:11:42,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:11:42,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:11:42,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:11:42,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:11:42,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:11:42,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:11:42,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:11:42,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:11:42,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:11:42,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:11:42,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:11:42,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:11:42,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:11:42,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:11:42,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:11:42,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:11:42,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:11:42,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:11:42,838 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 11:11:42,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:11:42,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:11:42,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:11:42,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:11:42,875 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:11:42,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:11:42,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:11:42,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:11:42,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:11:42,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:11:42,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:11:42,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:11:42,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:11:42,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:11:42,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:11:42,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:11:42,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:11:42,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:11:42,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:11:42,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:11:42,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:11:42,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:11:42,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:11:42,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:11:42,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:11:42,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:11:42,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:11:42,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:11:42,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:11:42,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:11:43,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:11:43,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:11:43,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:11:43,166 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:11:43,167 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:11:43,167 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-07 11:11:43,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1690ec922/ca5fd91196d7481aa68738c9335e2a78/FLAG65263a507 [2020-07-07 11:11:43,705 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:11:43,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-07 11:11:43,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1690ec922/ca5fd91196d7481aa68738c9335e2a78/FLAG65263a507 [2020-07-07 11:11:44,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1690ec922/ca5fd91196d7481aa68738c9335e2a78 [2020-07-07 11:11:44,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:11:44,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:11:44,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:11:44,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:11:44,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:11:44,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e156ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44, skipping insertion in model container [2020-07-07 11:11:44,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:11:44,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:11:44,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:11:44,385 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:11:44,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:11:44,422 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:11:44,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44 WrapperNode [2020-07-07 11:11:44,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:11:44,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:11:44,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:11:44,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:11:44,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:11:44,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:11:44,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:11:44,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:11:44,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (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 11:11:44,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:11:44,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:11:44,636 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-07 11:11:44,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:11:44,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:11:44,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:11:44,636 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-07 11:11:44,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:11:44,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:11:44,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:11:44,811 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:11:44,812 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:11:44,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:11:44 BoogieIcfgContainer [2020-07-07 11:11:44,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:11:44,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:11:44,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:11:44,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:11:44,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:11:44" (1/3) ... [2020-07-07 11:11:44,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8c13b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:11:44, skipping insertion in model container [2020-07-07 11:11:44,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (2/3) ... [2020-07-07 11:11:44,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8c13b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:11:44, skipping insertion in model container [2020-07-07 11:11:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:11:44" (3/3) ... [2020-07-07 11:11:44,824 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-07-07 11:11:44,835 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:11:44,842 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:11:44,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:11:44,910 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:11:44,910 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:11:44,910 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:11:44,910 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:11:44,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:11:44,911 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:11:44,911 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:11:44,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:11:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-07 11:11:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:11:44,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:44,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:44,974 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-07 11:11:44,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:44,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224513203] [2020-07-07 11:11:44,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,185 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 11:11:45,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224513203] [2020-07-07 11:11:45,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:11:45,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:11:45,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472769780] [2020-07-07 11:11:45,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:11:45,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:11:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:11:45,205 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-07 11:11:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:45,304 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-07 11:11:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:11:45,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:11:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:45,315 INFO L225 Difference]: With dead ends: 35 [2020-07-07 11:11:45,315 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:11:45,319 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 11:11:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:11:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:11:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:11:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-07 11:11:45,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-07 11:11:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:45,366 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-07 11:11:45,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:11:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-07 11:11:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:11:45,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:45,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:45,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:11:45,370 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:45,370 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-07 11:11:45,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:45,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479359151] [2020-07-07 11:11:45,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,435 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 11:11:45,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479359151] [2020-07-07 11:11:45,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:11:45,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:11:45,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089040429] [2020-07-07 11:11:45,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:11:45,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:11:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:11:45,440 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-07 11:11:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:45,497 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-07 11:11:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:11:45,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-07 11:11:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:45,499 INFO L225 Difference]: With dead ends: 27 [2020-07-07 11:11:45,500 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:11:45,501 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 11:11:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:11:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-07 11:11:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:11:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-07 11:11:45,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-07 11:11:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:45,509 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-07 11:11:45,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:11:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-07 11:11:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:11:45,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:45,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:45,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:11:45,512 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-07 11:11:45,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:45,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426440049] [2020-07-07 11:11:45,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:11:45,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426440049] [2020-07-07 11:11:45,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927119866] [2020-07-07 11:11:45,656 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 11:11:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:11:45,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:11:45,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:45,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-07 11:11:45,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3051630] [2020-07-07 11:11:45,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:11:45,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:11:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:11:45,780 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-07 11:11:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:45,902 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-07 11:11:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:11:45,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-07 11:11:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:45,904 INFO L225 Difference]: With dead ends: 38 [2020-07-07 11:11:45,904 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:11:45,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:11:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:11:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:11:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:11:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-07 11:11:45,913 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-07 11:11:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:45,914 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-07 11:11:45,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:11:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-07 11:11:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:11:45,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:45,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:46,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:11:46,131 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-07 11:11:46,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:46,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797240072] [2020-07-07 11:11:46,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:11:46,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797240072] [2020-07-07 11:11:46,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104945288] [2020-07-07 11:11:46,289 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 11:11:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:11:46,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:11:46,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:46,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-07 11:11:46,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378637879] [2020-07-07 11:11:46,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:11:46,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:11:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:11:46,349 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-07-07 11:11:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:46,444 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-07 11:11:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:11:46,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-07 11:11:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:46,447 INFO L225 Difference]: With dead ends: 41 [2020-07-07 11:11:46,447 INFO L226 Difference]: Without dead ends: 37 [2020-07-07 11:11:46,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:11:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-07 11:11:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-07 11:11:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 11:11:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-07 11:11:46,459 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-07 11:11:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:46,459 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-07 11:11:46,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:11:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-07 11:11:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:11:46,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:46,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:46,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:46,677 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-07-07 11:11:46,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:46,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119142905] [2020-07-07 11:11:46,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:11:46,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119142905] [2020-07-07 11:11:46,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863593304] [2020-07-07 11:11:46,818 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 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 11:11:46,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:11:46,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:46,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:11:46,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-07 11:11:46,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:46,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2020-07-07 11:11:46,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051373658] [2020-07-07 11:11:46,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:11:46,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:11:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:11:46,947 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 13 states. [2020-07-07 11:11:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:47,196 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2020-07-07 11:11:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:11:47,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-07 11:11:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:47,200 INFO L225 Difference]: With dead ends: 72 [2020-07-07 11:11:47,200 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 11:11:47,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:11:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 11:11:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-07 11:11:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:11:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-07 11:11:47,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 40 [2020-07-07 11:11:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:47,222 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-07 11:11:47,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:11:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-07 11:11:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-07 11:11:47,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:47,228 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:47,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:47,430 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 3 times [2020-07-07 11:11:47,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:47,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209423345] [2020-07-07 11:11:47,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 80 proven. 101 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-07 11:11:47,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209423345] [2020-07-07 11:11:47,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605313485] [2020-07-07 11:11:47,842 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 11:11:47,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-07-07 11:11:47,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:47,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:11:47,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-07 11:11:47,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:47,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 17 [2020-07-07 11:11:47,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925651510] [2020-07-07 11:11:47,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:11:47,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:11:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:11:47,957 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 17 states. [2020-07-07 11:11:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:48,245 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2020-07-07 11:11:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:11:48,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-07 11:11:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:48,249 INFO L225 Difference]: With dead ends: 89 [2020-07-07 11:11:48,249 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:11:48,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:11:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:11:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-07-07 11:11:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:11:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-07-07 11:11:48,262 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-07-07 11:11:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:48,263 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-07-07 11:11:48,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:11:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-07-07 11:11:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-07 11:11:48,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:48,267 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:48,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:48,480 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2068257585, now seen corresponding path program 4 times [2020-07-07 11:11:48,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:48,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45481135] [2020-07-07 11:11:48,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 231 proven. 362 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2020-07-07 11:11:49,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45481135] [2020-07-07 11:11:49,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102880534] [2020-07-07 11:11:49,099 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:11:49,151 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:11:49,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:49,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:11:49,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-07-07 11:11:49,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:49,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 22 [2020-07-07 11:11:49,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112043356] [2020-07-07 11:11:49,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:11:49,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:49,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:11:49,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:11:49,235 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 22 states. [2020-07-07 11:11:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:49,789 INFO L93 Difference]: Finished difference Result 124 states and 219 transitions. [2020-07-07 11:11:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:11:49,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 150 [2020-07-07 11:11:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:49,791 INFO L225 Difference]: With dead ends: 124 [2020-07-07 11:11:49,792 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 11:11:49,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:11:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 11:11:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-07-07 11:11:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:11:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-07-07 11:11:49,806 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 150 [2020-07-07 11:11:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:49,806 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-07-07 11:11:49,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:11:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-07-07 11:11:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:11:49,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:49,809 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:50,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:11:50,023 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-07 11:11:50,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:50,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167988123] [2020-07-07 11:11:50,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:11:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:11:50,077 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:11:50,077 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:11:50,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:11:50,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:11:50 BoogieIcfgContainer [2020-07-07 11:11:50,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:11:50,118 INFO L168 Benchmark]: Toolchain (without parser) took 5999.77 ms. Allocated memory was 146.8 MB in the beginning and 276.3 MB in the end (delta: 129.5 MB). Free memory was 103.2 MB in the beginning and 233.5 MB in the end (delta: -130.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:11:50,119 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:11:50,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.80 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:50,120 INFO L168 Benchmark]: Boogie Preprocessor took 40.41 ms. Allocated memory is still 146.8 MB. Free memory was 93.3 MB in the beginning and 92.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:50,121 INFO L168 Benchmark]: RCFGBuilder took 350.96 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 91.8 MB in the beginning and 173.1 MB in the end (delta: -81.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:50,122 INFO L168 Benchmark]: TraceAbstraction took 5299.17 ms. Allocated memory was 205.5 MB in the beginning and 276.3 MB in the end (delta: 70.8 MB). Free memory was 173.1 MB in the beginning and 233.5 MB in the end (delta: -60.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:50,125 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.80 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.41 ms. Allocated memory is still 146.8 MB. Free memory was 93.3 MB in the beginning and 92.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.96 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 91.8 MB in the beginning and 173.1 MB in the end (delta: -81.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5299.17 ms. Allocated memory was 205.5 MB in the beginning and 276.3 MB in the end (delta: 70.8 MB). Free memory was 173.1 MB in the beginning and 233.5 MB in the end (delta: -60.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; VAL [x=5] [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) VAL [fibo(x)=5, x=5] [L25] int result = fibo(x); [L26] COND TRUE result == 5 VAL [result=5, x=5] [L27] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 280 SDslu, 482 SDs, 0 SdLazy, 783 SolverSat, 274 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 527 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 786 NumberOfCodeBlocks, 755 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 665 ConstructedInterpolants, 0 QuantifiedInterpolants, 119433 SizeOfPredicates, 20 NumberOfNonLiveVariables, 645 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2323/3048 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...