/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_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:19:12,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:19:12,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:19:12,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:19:12,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:19:12,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:19:12,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:19:12,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:19:12,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:19:12,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:19:12,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:19:12,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:19:12,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:19:12,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:19:12,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:19:12,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:19:12,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:19:12,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:19:12,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:19:12,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:19:12,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:19:12,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:19:12,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:19:12,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:19:12,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:19:12,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:19:12,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:19:12,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:19:12,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:19:12,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:19:12,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:19:12,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:19:12,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:19:12,255 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:19:12,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:19:12,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:19:12,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:19:12,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:19:12,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:19:12,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:19:12,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:19:12,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:19:12,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:19:12,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:19:12,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:19:12,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:19:12,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:19:12,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:19:12,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:19:12,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:19:12,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:19:12,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:19:12,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:19:12,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:19:12,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:19:12,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:19:12,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:19:12,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:19:12,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:19:12,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:19:12,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:19:12,769 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:19:12,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:19:12,771 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:19:12,772 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-09-04 13:19:12,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156acf527/3c0b4cf0027140c293961a2336fbf03f/FLAG410361a62 [2020-09-04 13:19:13,412 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:19:13,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-09-04 13:19:13,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156acf527/3c0b4cf0027140c293961a2336fbf03f/FLAG410361a62 [2020-09-04 13:19:13,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156acf527/3c0b4cf0027140c293961a2336fbf03f [2020-09-04 13:19:13,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:19:13,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:19:13,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:19:13,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:19:13,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:19:13,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13, skipping insertion in model container [2020-09-04 13:19:13,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:19:13,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:19:14,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:19:14,048 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:19:14,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:19:14,083 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:19:14,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14 WrapperNode [2020-09-04 13:19:14,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:19:14,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:19:14,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:19:14,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:19:14,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... [2020-09-04 13:19:14,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:19:14,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:19:14,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:19:14,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:19:14,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:19:14,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:19:14,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:19:14,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-04 13:19:14,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-04 13:19:14,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:19:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:19:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:19:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-04 13:19:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-04 13:19:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:19:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:19:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:19:14,519 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:19:14,520 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:19:14,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:14 BoogieIcfgContainer [2020-09-04 13:19:14,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:19:14,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:19:14,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:19:14,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:19:14,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:19:13" (1/3) ... [2020-09-04 13:19:14,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8df82cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:14, skipping insertion in model container [2020-09-04 13:19:14,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:14" (2/3) ... [2020-09-04 13:19:14,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8df82cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:14, skipping insertion in model container [2020-09-04 13:19:14,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:14" (3/3) ... [2020-09-04 13:19:14,538 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-09-04 13:19:14,551 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:19:14,565 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:19:14,594 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:19:14,645 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:19:14,645 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:19:14,645 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:19:14,645 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:19:14,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:19:14,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:19:14,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:19:14,646 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:19:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 13:19:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:19:14,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:14,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:14,687 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-04 13:19:14,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:14,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528223970] [2020-09-04 13:19:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:19:14,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528223970] [2020-09-04 13:19:14,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:19:14,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:19:14,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520384775] [2020-09-04 13:19:15,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:19:15,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:19:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:19:15,024 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-04 13:19:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:15,156 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-04 13:19:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:19:15,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:19:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:15,174 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:19:15,175 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:19:15,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:19:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:19:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:19:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:19:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:19:15,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-04 13:19:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:15,244 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:19:15,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:19:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:19:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:19:15,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:15,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:15,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:19:15,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-04 13:19:15,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:15,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838931071] [2020-09-04 13:19:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:19:15,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838931071] [2020-09-04 13:19:15,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:19:15,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:19:15,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113673320] [2020-09-04 13:19:15,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:19:15,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:19:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:19:15,325 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-04 13:19:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:15,400 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-04 13:19:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:19:15,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:19:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:15,403 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:19:15,403 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 13:19:15,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:19:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 13:19:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-04 13:19:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:19:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:19:15,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-04 13:19:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:15,417 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:19:15,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:19:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:19:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:19:15,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:15,419 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] [2020-09-04 13:19:15,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:19:15,420 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:15,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-04 13:19:15,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:15,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721536756] [2020-09-04 13:19:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:19:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721536756] [2020-09-04 13:19:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061063899] [2020-09-04 13:19:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:15,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:15,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-09-04 13:19:15,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597661227] [2020-09-04 13:19:15,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:19:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:19:15,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:19:15,904 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-09-04 13:19:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:16,192 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-04 13:19:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:19:16,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-04 13:19:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:16,195 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:19:16,195 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:19:16,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:19:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:19:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 13:19:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:19:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-04 13:19:16,207 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-04 13:19:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:16,208 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-04 13:19:16,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:19:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-04 13:19:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:19:16,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:16,210 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] [2020-09-04 13:19:16,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:19:16,421 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-04 13:19:16,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:16,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627430314] [2020-09-04 13:19:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:16,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627430314] [2020-09-04 13:19:16,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985483464] [2020-09-04 13:19:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:19:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:16,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:16,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-09-04 13:19:16,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083534033] [2020-09-04 13:19:16,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:19:16,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:19:16,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:19:16,676 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-09-04 13:19:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:16,883 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-09-04 13:19:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:19:16,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-04 13:19:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:16,889 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:19:16,889 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:19:16,890 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 [2020-09-04 13:19:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:19:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-09-04 13:19:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:19:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-09-04 13:19:16,906 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-09-04 13:19:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:16,906 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-09-04 13:19:16,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:19:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-09-04 13:19:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 13:19:16,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:16,909 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] [2020-09-04 13:19:17,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:17,123 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-09-04 13:19:17,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:17,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998449378] [2020-09-04 13:19:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:19:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 13:19:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:19:17,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998449378] [2020-09-04 13:19:17,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319169485] [2020-09-04 13:19:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:19:17,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:17,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-09-04 13:19:17,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48918382] [2020-09-04 13:19:17,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:19:17,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:19:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:19:17,399 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-09-04 13:19:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:17,769 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-09-04 13:19:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:19:17,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-04 13:19:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:17,772 INFO L225 Difference]: With dead ends: 108 [2020-09-04 13:19:17,772 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:19:17,777 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 [2020-09-04 13:19:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:19:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 13:19:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:19:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-09-04 13:19:17,801 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-09-04 13:19:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:17,801 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-09-04 13:19:17,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:19:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-09-04 13:19:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 13:19:17,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:17,804 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] [2020-09-04 13:19:18,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:18,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-09-04 13:19:18,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:18,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600247000] [2020-09-04 13:19:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:19:18,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600247000] [2020-09-04 13:19:18,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347442635] [2020-09-04 13:19:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:19:18,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:18,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-09-04 13:19:18,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115710094] [2020-09-04 13:19:18,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:19:18,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:19:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:19:18,346 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-09-04 13:19:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:18,861 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-09-04 13:19:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:19:18,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-04 13:19:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:18,866 INFO L225 Difference]: With dead ends: 180 [2020-09-04 13:19:18,866 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 13:19:18,870 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 [2020-09-04 13:19:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 13:19:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-09-04 13:19:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-04 13:19:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-09-04 13:19:18,895 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-09-04 13:19:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:18,896 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-09-04 13:19:18,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:19:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-09-04 13:19:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 13:19:18,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:18,900 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] [2020-09-04 13:19:19,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:19,116 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-09-04 13:19:19,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:19,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942846438] [2020-09-04 13:19:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 13:19:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 13:19:19,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942846438] [2020-09-04 13:19:19,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916961665] [2020-09-04 13:19:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:19:19,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-04 13:19:19,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:19,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-09-04 13:19:19,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353414696] [2020-09-04 13:19:19,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:19:19,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:19:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:19:19,570 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-09-04 13:19:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:20,232 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-09-04 13:19:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:19:20,233 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-04 13:19:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:20,239 INFO L225 Difference]: With dead ends: 258 [2020-09-04 13:19:20,240 INFO L226 Difference]: Without dead ends: 158 [2020-09-04 13:19:20,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:19:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-04 13:19:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-09-04 13:19:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 13:19:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-09-04 13:19:20,295 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-09-04 13:19:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:20,297 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-09-04 13:19:20,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:19:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-09-04 13:19:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 13:19:20,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:20,309 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:20,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:19:20,511 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-09-04 13:19:20,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:20,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012404429] [2020-09-04 13:19:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 13:19:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-09-04 13:19:20,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012404429] [2020-09-04 13:19:20,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595532445] [2020-09-04 13:19:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-04 13:19:20,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:20,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-09-04 13:19:20,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337978625] [2020-09-04 13:19:20,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:19:20,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:19:20,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:19:20,932 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-09-04 13:19:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:21,435 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-09-04 13:19:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:19:21,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-09-04 13:19:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:21,441 INFO L225 Difference]: With dead ends: 244 [2020-09-04 13:19:21,442 INFO L226 Difference]: Without dead ends: 123 [2020-09-04 13:19:21,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:19:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-04 13:19:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-09-04 13:19:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-04 13:19:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-09-04 13:19:21,461 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-09-04 13:19:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:21,462 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-09-04 13:19:21,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:19:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-09-04 13:19:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 13:19:21,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:21,465 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:21,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:21,680 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-09-04 13:19:21,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:21,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687938969] [2020-09-04 13:19:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:19:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-09-04 13:19:22,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687938969] [2020-09-04 13:19:22,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668252529] [2020-09-04 13:19:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:22,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:19:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-09-04 13:19:22,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:22,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-09-04 13:19:22,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522457335] [2020-09-04 13:19:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:19:22,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:19:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:19:22,465 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-09-04 13:19:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:23,292 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-09-04 13:19:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 13:19:23,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-09-04 13:19:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:23,296 INFO L225 Difference]: With dead ends: 238 [2020-09-04 13:19:23,296 INFO L226 Difference]: Without dead ends: 135 [2020-09-04 13:19:23,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 13:19:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-04 13:19:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-09-04 13:19:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 13:19:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-09-04 13:19:23,323 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-09-04 13:19:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:23,323 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-09-04 13:19:23,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:19:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-09-04 13:19:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-04 13:19:23,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:23,330 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:23,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:23,547 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-09-04 13:19:23,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:23,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406802431] [2020-09-04 13:19:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:19:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-09-04 13:19:23,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406802431] [2020-09-04 13:19:23,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922549529] [2020-09-04 13:19:23,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:23,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:19:23,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:19:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-09-04 13:19:24,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:24,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-09-04 13:19:24,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254513481] [2020-09-04 13:19:24,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:19:24,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:24,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:19:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:19:24,019 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-09-04 13:19:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:24,477 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-09-04 13:19:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:19:24,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-09-04 13:19:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:24,480 INFO L225 Difference]: With dead ends: 228 [2020-09-04 13:19:24,482 INFO L226 Difference]: Without dead ends: 129 [2020-09-04 13:19:24,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:19:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-04 13:19:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-09-04 13:19:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-04 13:19:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-09-04 13:19:24,504 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-09-04 13:19:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:24,504 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-09-04 13:19:24,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:19:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-09-04 13:19:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:19:24,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:24,508 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:24,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-04 13:19:24,723 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:24,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-09-04 13:19:24,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:24,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872915020] [2020-09-04 13:19:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:24,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:24,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:19:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-09-04 13:19:25,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872915020] [2020-09-04 13:19:25,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480305613] [2020-09-04 13:19:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:25,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-04 13:19:25,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:19:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-09-04 13:19:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-09-04 13:19:26,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:26,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-09-04 13:19:26,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737673273] [2020-09-04 13:19:26,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 13:19:26,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 13:19:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:19:26,018 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand 28 states. [2020-09-04 13:19:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:26,295 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2020-09-04 13:19:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:19:26,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-09-04 13:19:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:26,298 INFO L225 Difference]: With dead ends: 127 [2020-09-04 13:19:26,298 INFO L226 Difference]: Without dead ends: 123 [2020-09-04 13:19:26,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:19:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-04 13:19:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-09-04 13:19:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-04 13:19:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-09-04 13:19:26,311 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 109 [2020-09-04 13:19:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:26,312 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-09-04 13:19:26,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 13:19:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-09-04 13:19:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-04 13:19:26,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:26,315 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:26,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:26,529 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash 648432456, now seen corresponding path program 1 times [2020-09-04 13:19:26,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:26,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500493110] [2020-09-04 13:19:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 13:19:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-04 13:19:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 58 proven. 143 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-09-04 13:19:26,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500493110] [2020-09-04 13:19:26,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14062636] [2020-09-04 13:19:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:19:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 49 proven. 168 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:19:26,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:26,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-09-04 13:19:26,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654955331] [2020-09-04 13:19:26,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:19:26,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:19:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:19:26,993 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand 16 states. [2020-09-04 13:19:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:27,393 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2020-09-04 13:19:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:19:27,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-09-04 13:19:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:27,394 INFO L225 Difference]: With dead ends: 212 [2020-09-04 13:19:27,395 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:19:27,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:19:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:19:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:19:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:19:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:19:27,397 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2020-09-04 13:19:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:27,398 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:19:27,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:19:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:19:27,398 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:19:27,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:27,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:19:28,978 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 17 [2020-09-04 13:19:29,463 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2020-09-04 13:19:29,470 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:19:29,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:19:29,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:19:29,471 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:19:29,471 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:19:29,471 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:19:29,472 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-04 13:19:29,472 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-09-04 13:19:29,472 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-09-04 13:19:29,472 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-09-04 13:19:29,473 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-04 13:19:29,473 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-04 13:19:29,473 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-09-04 13:19:29,473 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-04 13:19:29,474 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-09-04 13:19:29,474 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-09-04 13:19:29,474 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2020-09-04 13:19:29,474 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-04 13:19:29,474 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#in~n| 3) (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|)) (<= 5 |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 2))) [2020-09-04 13:19:29,475 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-04 13:19:29,475 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-04 13:19:29,475 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-09-04 13:19:29,475 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-09-04 13:19:29,475 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-09-04 13:19:29,475 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-09-04 13:19:29,476 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2020-09-04 13:19:29,476 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-04 13:19:29,476 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (or (and (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (and (<= 3 |fibo1_#t~ret0|) (<= 5 fibo1_~n) (<= |fibo1_#t~ret0| 3)) (and (<= 4 |fibo1_#in~n|) (<= |fibo1_#in~n| 4)) (<= 6 |fibo1_#in~n|)) (= fibo1_~n |fibo1_#in~n|)) [2020-09-04 13:19:29,476 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-09-04 13:19:29,476 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-09-04 13:19:29,476 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-09-04 13:19:29,477 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-09-04 13:19:29,477 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-09-04 13:19:29,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:19:29 BoogieIcfgContainer [2020-09-04 13:19:29,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:19:29,487 INFO L168 Benchmark]: Toolchain (without parser) took 15721.70 ms. Allocated memory was 140.0 MB in the beginning and 361.2 MB in the end (delta: 221.2 MB). Free memory was 103.7 MB in the beginning and 112.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 212.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:29,488 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:19:29,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.55 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:29,489 INFO L168 Benchmark]: Boogie Preprocessor took 123.55 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 181.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:29,490 INFO L168 Benchmark]: RCFGBuilder took 317.17 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 168.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:29,491 INFO L168 Benchmark]: TraceAbstraction took 14957.04 ms. Allocated memory was 202.9 MB in the beginning and 361.2 MB in the end (delta: 158.3 MB). Free memory was 167.8 MB in the beginning and 112.2 MB in the end (delta: 55.6 MB). Peak memory consumption was 213.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:29,495 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.55 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.55 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 181.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.17 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 168.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14957.04 ms. Allocated memory was 202.9 MB in the beginning and 361.2 MB in the end (delta: 158.3 MB). Free memory was 167.8 MB in the beginning and 112.2 MB in the end (delta: 55.6 MB). Peak memory consumption was 213.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 389 SDtfs, 463 SDslu, 3006 SDs, 0 SdLazy, 3048 SolverSat, 460 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 966 SyntacticMatches, 8 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 139 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 449 PreInvPairs, 567 NumberOfFragments, 88 HoareAnnotationTreeSize, 449 FomulaSimplifications, 3023 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3484 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1517 NumberOfCodeBlocks, 1517 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1495 ConstructedInterpolants, 0 QuantifiedInterpolants, 296013 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1665 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2288/3178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...