/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_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:33:39,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:33:39,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:33:39,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:33:39,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:33:39,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:33:39,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:33:39,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:33:39,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:33:39,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:33:39,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:33:39,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:33:39,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:33:39,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:33:39,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:33:39,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:33:39,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:33:39,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:33:39,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:33:39,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:33:39,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:33:39,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:33:39,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:33:39,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:33:39,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:33:39,854 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 [2020-08-22 16:33:39,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:33:39,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:33:39,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:33:39,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:33:39,877 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:33:39,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:33:39,877 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:33:39,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:33:39,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:33:39,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:33:39,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:33:39,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:33:39,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:33:39,878 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:33:39,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:33:39,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:33:39,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:33:39,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:33:39,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:33:39,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:33:39,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:33:39,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:33:39,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:33:39,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:33:39,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:33:39,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:33:39,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:33:39,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:33:39,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:33:39,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:33:40,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:33:40,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:33:40,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:33:40,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:33:40,195 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:33:40,195 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-22 16:33:40,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fdc2435e/b332addf6fdc4d3ba039265f45832b38/FLAG4da32ad76 [2020-08-22 16:33:40,662 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:33:40,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-22 16:33:40,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fdc2435e/b332addf6fdc4d3ba039265f45832b38/FLAG4da32ad76 [2020-08-22 16:33:41,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fdc2435e/b332addf6fdc4d3ba039265f45832b38 [2020-08-22 16:33:41,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:33:41,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:33:41,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:33:41,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:33:41,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:33:41,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44135d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41, skipping insertion in model container [2020-08-22 16:33:41,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:33:41,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:33:41,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:33:41,326 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:33:41,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:33:41,359 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:33:41,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41 WrapperNode [2020-08-22 16:33:41,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:33:41,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:33:41,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:33:41,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:33:41,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (1/1) ... [2020-08-22 16:33:41,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:33:41,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:33:41,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:33:41,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:33:41,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (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 [2020-08-22 16:33:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:33:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:33:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 16:33:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 16:33:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:33:41,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:33:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:33:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 16:33:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 16:33:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:33:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:33:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:33:41,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:33:41,830 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:33:41,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:33:41 BoogieIcfgContainer [2020-08-22 16:33:41,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:33:41,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:33:41,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:33:41,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:33:41,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:33:41" (1/3) ... [2020-08-22 16:33:41,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c8d67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:33:41, skipping insertion in model container [2020-08-22 16:33:41,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:41" (2/3) ... [2020-08-22 16:33:41,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c8d67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:33:41, skipping insertion in model container [2020-08-22 16:33:41,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:33:41" (3/3) ... [2020-08-22 16:33:41,843 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-08-22 16:33:41,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:33:41,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:33:41,884 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:33:41,913 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:33:41,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:33:41,913 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:33:41,913 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:33:41,914 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:33:41,914 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:33:41,914 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:33:41,914 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:33:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 16:33:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:33:41,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:41,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:33:41,945 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-22 16:33:41,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:41,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210919526] [2020-08-22 16:33:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:33:42,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210919526] [2020-08-22 16:33:42,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:33:42,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:33:42,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406069238] [2020-08-22 16:33:42,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:33:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:33:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:33:42,202 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-22 16:33:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:42,321 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-22 16:33:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:33:42,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:33:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:42,341 INFO L225 Difference]: With dead ends: 44 [2020-08-22 16:33:42,341 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:33:42,347 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 [2020-08-22 16:33:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:33:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:33:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:33:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 16:33:42,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-22 16:33:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:42,394 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 16:33:42,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:33:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 16:33:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:33:42,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:42,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:33:42,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:33:42,398 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-22 16:33:42,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:42,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211996706] [2020-08-22 16:33:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:33:42,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211996706] [2020-08-22 16:33:42,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:33:42,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:33:42,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328284366] [2020-08-22 16:33:42,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:33:42,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:42,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:33:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:33:42,471 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-22 16:33:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:42,537 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-22 16:33:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:33:42,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 16:33:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:42,539 INFO L225 Difference]: With dead ends: 36 [2020-08-22 16:33:42,540 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 16:33:42,541 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 [2020-08-22 16:33:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 16:33:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 16:33:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:33:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 16:33:42,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-22 16:33:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:42,551 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 16:33:42,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:33:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 16:33:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:33:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:42,553 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] [2020-08-22 16:33:42,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:33:42,554 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-22 16:33:42,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:42,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100389489] [2020-08-22 16:33:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 16:33:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:42,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100389489] [2020-08-22 16:33:42,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558816039] [2020-08-22 16:33:42,709 INFO L95 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 [2020-08-22 16:33:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:33:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:42,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:42,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-08-22 16:33:42,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139201173] [2020-08-22 16:33:42,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:33:42,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:33:42,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:33:42,909 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-08-22 16:33:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:43,113 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-22 16:33:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:33:43,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-22 16:33:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:43,115 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:33:43,115 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 16:33:43,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:33:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 16:33:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 16:33:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 16:33:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-22 16:33:43,125 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-22 16:33:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:43,126 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-22 16:33:43,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:33:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-22 16:33:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:33:43,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:43,128 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] [2020-08-22 16:33:43,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:33:43,342 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:43,343 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-22 16:33:43,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:43,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582516836] [2020-08-22 16:33:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:43,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582516836] [2020-08-22 16:33:43,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259848047] [2020-08-22 16:33:43,478 INFO L95 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) [2020-08-22 16:33:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:43,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:43,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-08-22 16:33:43,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590765784] [2020-08-22 16:33:43,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:33:43,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:43,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:33:43,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:33:43,561 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-08-22 16:33:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:43,741 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-22 16:33:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:33:43,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-22 16:33:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:43,746 INFO L225 Difference]: With dead ends: 54 [2020-08-22 16:33:43,746 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 16:33:43,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:33:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 16:33:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-22 16:33:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:33:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-22 16:33:43,761 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-22 16:33:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:43,762 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-22 16:33:43,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:33:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-22 16:33:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:33:43,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:43,764 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] [2020-08-22 16:33:43,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:43,979 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-22 16:33:43,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:43,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963281075] [2020-08-22 16:33:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 16:33:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 16:33:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:33:44,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963281075] [2020-08-22 16:33:44,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071702379] [2020-08-22 16:33:44,078 INFO L95 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 [2020-08-22 16:33:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 16:33:44,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:44,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-08-22 16:33:44,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689807482] [2020-08-22 16:33:44,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:33:44,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:33:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:33:44,208 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-08-22 16:33:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:44,498 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-08-22 16:33:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:33:44,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-08-22 16:33:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:44,500 INFO L225 Difference]: With dead ends: 108 [2020-08-22 16:33:44,500 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:33:44,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:33:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:33:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 16:33:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 16:33:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-08-22 16:33:44,515 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-08-22 16:33:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:44,515 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-08-22 16:33:44,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:33:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-08-22 16:33:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 16:33:44,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:44,518 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] [2020-08-22 16:33:44,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:44,733 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-22 16:33:44,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:44,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936214353] [2020-08-22 16:33:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 16:33:44,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936214353] [2020-08-22 16:33:44,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135321079] [2020-08-22 16:33:44,906 INFO L95 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 [2020-08-22 16:33:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:33:45,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:45,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-08-22 16:33:45,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840900835] [2020-08-22 16:33:45,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:33:45,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:33:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:33:45,015 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-08-22 16:33:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:45,484 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-08-22 16:33:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:33:45,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-08-22 16:33:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:45,489 INFO L225 Difference]: With dead ends: 180 [2020-08-22 16:33:45,489 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 16:33:45,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:33:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 16:33:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-08-22 16:33:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-22 16:33:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-08-22 16:33:45,515 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-08-22 16:33:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:45,515 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-08-22 16:33:45,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:33:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-08-22 16:33:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 16:33:45,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:45,530 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] [2020-08-22 16:33:45,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:45,743 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-22 16:33:45,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:45,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570713215] [2020-08-22 16:33:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:33:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 16:33:45,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570713215] [2020-08-22 16:33:45,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81550428] [2020-08-22 16:33:45,897 INFO L95 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 [2020-08-22 16:33:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 16:33:46,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:46,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-08-22 16:33:46,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764311101] [2020-08-22 16:33:46,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:33:46,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:33:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:33:46,020 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 12 states. [2020-08-22 16:33:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:46,346 INFO L93 Difference]: Finished difference Result 265 states and 511 transitions. [2020-08-22 16:33:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:33:46,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-08-22 16:33:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:46,353 INFO L225 Difference]: With dead ends: 265 [2020-08-22 16:33:46,353 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 16:33:46,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:33:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 16:33:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-08-22 16:33:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-08-22 16:33:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2020-08-22 16:33:46,411 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2020-08-22 16:33:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:46,411 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2020-08-22 16:33:46,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:33:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2020-08-22 16:33:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:33:46,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:46,419 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] [2020-08-22 16:33:46,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:33:46,621 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-22 16:33:46,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:46,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247725261] [2020-08-22 16:33:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 16:33:46,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247725261] [2020-08-22 16:33:46,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392505798] [2020-08-22 16:33:46,790 INFO L95 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 [2020-08-22 16:33:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:33:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 16:33:46,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:46,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-08-22 16:33:46,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000929307] [2020-08-22 16:33:46,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:33:46,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:46,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:33:46,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:33:46,879 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand 13 states. [2020-08-22 16:33:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:47,222 INFO L93 Difference]: Finished difference Result 304 states and 583 transitions. [2020-08-22 16:33:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:33:47,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-22 16:33:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:47,225 INFO L225 Difference]: With dead ends: 304 [2020-08-22 16:33:47,225 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 16:33:47,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:33:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 16:33:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-08-22 16:33:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 16:33:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-08-22 16:33:47,242 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 55 [2020-08-22 16:33:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:47,243 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-08-22 16:33:47,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:33:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-08-22 16:33:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 16:33:47,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:47,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 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] [2020-08-22 16:33:47,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:47,462 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 2 times [2020-08-22 16:33:47,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:47,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252487431] [2020-08-22 16:33:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 16:33:47,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252487431] [2020-08-22 16:33:47,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938686331] [2020-08-22 16:33:47,657 INFO L93 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 [2020-08-22 16:33:47,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:33:47,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:33:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-08-22 16:33:47,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:47,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-08-22 16:33:47,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211741858] [2020-08-22 16:33:47,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:33:47,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:33:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:33:47,813 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 16 states. [2020-08-22 16:33:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:48,360 INFO L93 Difference]: Finished difference Result 174 states and 293 transitions. [2020-08-22 16:33:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 16:33:48,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-08-22 16:33:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:48,363 INFO L225 Difference]: With dead ends: 174 [2020-08-22 16:33:48,363 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 16:33:48,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:33:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 16:33:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-08-22 16:33:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 16:33:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-08-22 16:33:48,388 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2020-08-22 16:33:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:48,389 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-08-22 16:33:48,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:33:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-08-22 16:33:48,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 16:33:48,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:48,393 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] [2020-08-22 16:33:48,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:48,594 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-22 16:33:48,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:48,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544094049] [2020-08-22 16:33:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:33:48,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:33:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:33:48,616 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:33:48,632 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:33:48,633 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:33:48,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 16:33:48,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:33:48 BoogieIcfgContainer [2020-08-22 16:33:48,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:33:48,670 INFO L168 Benchmark]: Toolchain (without parser) took 7560.07 ms. Allocated memory was 140.5 MB in the beginning and 266.3 MB in the end (delta: 125.8 MB). Free memory was 102.5 MB in the beginning and 123.5 MB in the end (delta: -21.0 MB). Peak memory consumption was 104.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:48,676 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:33:48,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.83 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:48,677 INFO L168 Benchmark]: Boogie Preprocessor took 149.62 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 183.9 MB in the end (delta: -91.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:48,678 INFO L168 Benchmark]: RCFGBuilder took 320.61 ms. Allocated memory is still 205.5 MB. Free memory was 183.9 MB in the beginning and 170.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:48,683 INFO L168 Benchmark]: TraceAbstraction took 6830.81 ms. Allocated memory was 205.5 MB in the beginning and 266.3 MB in the end (delta: 60.8 MB). Free memory was 170.0 MB in the beginning and 123.5 MB in the end (delta: 46.5 MB). Peak memory consumption was 107.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:48,691 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.83 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.62 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 183.9 MB in the end (delta: -91.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.61 ms. Allocated memory is still 205.5 MB. Free memory was 183.9 MB in the beginning and 170.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6830.81 ms. Allocated memory was 205.5 MB in the beginning and 266.3 MB in the end (delta: 60.8 MB). Free memory was 170.0 MB in the beginning and 123.5 MB in the end (delta: 46.5 MB). Peak memory consumption was 107.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; VAL [x=4] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L37] int result = fibo1(x); [L38] COND TRUE result == 3 VAL [result=3, x=4] [L39] __VERIFIER_error() VAL [result=3, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 260 SDtfs, 349 SDslu, 1349 SDs, 0 SdLazy, 1776 SolverSat, 292 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 539 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 715 NumberOfCodeBlocks, 715 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 631 ConstructedInterpolants, 0 QuantifiedInterpolants, 52071 SizeOfPredicates, 25 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 330/432 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...