/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:02:50,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:02:50,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:02:50,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:02:50,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:02:50,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:02:50,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:02:50,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:02:50,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:02:50,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:02:50,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:02:50,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:02:50,192 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:02:50,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:02:50,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:02:50,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:02:50,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:02:50,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:02:50,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:02:50,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:02:50,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:02:50,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:02:50,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:02:50,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:02:50,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:02:50,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:02:50,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:02:50,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:02:50,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:02:50,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:02:50,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:02:50,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:02:50,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:02:50,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:02:50,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:02:50,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:02:50,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:02:50,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:02:50,596 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:02:50,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-12-22 07:02:50,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb002b334/971f288ace5e4e7199ff8fccbab2aa1b/FLAGdf7ccabdb [2020-12-22 07:02:51,309 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:02:51,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-12-22 07:02:51,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb002b334/971f288ace5e4e7199ff8fccbab2aa1b/FLAGdf7ccabdb [2020-12-22 07:02:51,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb002b334/971f288ace5e4e7199ff8fccbab2aa1b [2020-12-22 07:02:51,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:02:51,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:02:51,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:02:51,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:02:51,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:02:51,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:02:51" (1/1) ... [2020-12-22 07:02:51,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ca96e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:51, skipping insertion in model container [2020-12-22 07:02:51,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:02:51" (1/1) ... [2020-12-22 07:02:51,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:02:51,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:02:52,005 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2020-12-22 07:02:52,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:02:52,020 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:02:52,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2020-12-22 07:02:52,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:02:52,057 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:02:52,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52 WrapperNode [2020-12-22 07:02:52,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:02:52,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:02:52,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:02:52,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:02:52,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:02:52,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:02:52,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:02:52,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:02:52,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... [2020-12-22 07:02:52,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:02:52,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:02:52,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:02:52,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:02:52,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:02:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:02:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:02:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:02:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:02:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-12-22 07:02:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-12-22 07:02:52,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:02:52,522 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:02:52,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:02:52 BoogieIcfgContainer [2020-12-22 07:02:52,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:02:52,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:02:52,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:02:52,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:02:52,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:02:51" (1/3) ... [2020-12-22 07:02:52,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117dfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:02:52, skipping insertion in model container [2020-12-22 07:02:52,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:52" (2/3) ... [2020-12-22 07:02:52,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117dfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:02:52, skipping insertion in model container [2020-12-22 07:02:52,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:02:52" (3/3) ... [2020-12-22 07:02:52,534 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-12-22 07:02:52,542 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:02:52,548 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:02:52,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:02:52,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:02:52,604 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:02:52,604 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:02:52,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:02:52,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:02:52,605 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:02:52,605 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:02:52,605 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:02:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 07:02:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 07:02:52,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:52,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:52,633 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2020-12-22 07:02:52,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:52,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851705032] [2020-12-22 07:02:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:02:53,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851705032] [2020-12-22 07:02:53,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:02:53,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:02:53,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910753601] [2020-12-22 07:02:53,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:02:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:02:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:02:53,065 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-12-22 07:02:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:53,152 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-12-22 07:02:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:02:53,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 07:02:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:53,163 INFO L225 Difference]: With dead ends: 30 [2020-12-22 07:02:53,163 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 07:02:53,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:02:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 07:02:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 07:02:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:02:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-22 07:02:53,211 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-12-22 07:02:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:53,211 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-22 07:02:53,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:02:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-22 07:02:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 07:02:53,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:53,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:53,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:02:53,214 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:53,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2020-12-22 07:02:53,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:53,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236577922] [2020-12-22 07:02:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:02:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236577922] [2020-12-22 07:02:53,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:02:53,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:02:53,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934723122] [2020-12-22 07:02:53,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:02:53,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:02:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:02:53,299 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-22 07:02:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:53,371 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-12-22 07:02:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:02:53,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 07:02:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:53,373 INFO L225 Difference]: With dead ends: 24 [2020-12-22 07:02:53,374 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 07:02:53,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:02:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 07:02:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-22 07:02:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:02:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-22 07:02:53,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-12-22 07:02:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:53,383 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-22 07:02:53,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:02:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-22 07:02:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 07:02:53,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:53,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:53,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:02:53,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2020-12-22 07:02:53,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:53,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179861951] [2020-12-22 07:02:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-22 07:02:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:02:53,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179861951] [2020-12-22 07:02:53,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047971099] [2020-12-22 07:02:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 07:02:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:02:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:02:53,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:02:53,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-22 07:02:53,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74248601] [2020-12-22 07:02:53,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:02:53,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:02:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:02:53,699 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 9 states. [2020-12-22 07:02:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:53,820 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-22 07:02:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:02:53,820 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-22 07:02:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:53,822 INFO L225 Difference]: With dead ends: 35 [2020-12-22 07:02:53,822 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 07:02:53,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:02:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 07:02:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 07:02:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 07:02:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 07:02:53,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2020-12-22 07:02:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:53,831 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 07:02:53,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:02:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 07:02:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 07:02:53,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:53,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:54,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 07:02:54,047 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2020-12-22 07:02:54,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:54,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386878241] [2020-12-22 07:02:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:02:54,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386878241] [2020-12-22 07:02:54,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186976344] [2020-12-22 07:02:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 07:02:54,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:02:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:02:54,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:02:54,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-12-22 07:02:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932110557] [2020-12-22 07:02:54,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:02:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:02:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:02:54,305 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 8 states. [2020-12-22 07:02:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:54,396 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-12-22 07:02:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:02:54,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-22 07:02:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:54,399 INFO L225 Difference]: With dead ends: 38 [2020-12-22 07:02:54,399 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 07:02:54,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:02:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 07:02:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 07:02:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 07:02:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-12-22 07:02:54,413 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2020-12-22 07:02:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:54,413 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-12-22 07:02:54,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:02:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-12-22 07:02:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:02:54,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:54,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:54,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:54,631 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2020-12-22 07:02:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:54,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653904653] [2020-12-22 07:02:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 07:02:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653904653] [2020-12-22 07:02:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032605571] [2020-12-22 07:02:54,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 07:02:54,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:02:54,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:02:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 07:02:54,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:02:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 07:02:55,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:02:55,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 07:02:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357489147] [2020-12-22 07:02:55,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 07:02:55,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 07:02:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:02:55,003 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 13 states. [2020-12-22 07:02:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:55,223 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2020-12-22 07:02:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 07:02:55,224 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-22 07:02:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:55,226 INFO L225 Difference]: With dead ends: 69 [2020-12-22 07:02:55,226 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 07:02:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:02:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 07:02:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 07:02:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 07:02:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-12-22 07:02:55,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-12-22 07:02:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:55,236 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-12-22 07:02:55,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 07:02:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-12-22 07:02:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:02:55,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:55,239 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:55,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:55,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash 366248375, now seen corresponding path program 3 times [2020-12-22 07:02:55,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:55,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938651140] [2020-12-22 07:02:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-22 07:02:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 07:02:55,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938651140] [2020-12-22 07:02:55,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096303759] [2020-12-22 07:02:55,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:55,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 07:02:55,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:02:55,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 07:02:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:02:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-12-22 07:02:55,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:02:55,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 12 [2020-12-22 07:02:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27730490] [2020-12-22 07:02:55,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:02:55,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:55,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:02:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:02:55,964 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 12 states. [2020-12-22 07:02:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:56,126 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-12-22 07:02:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:02:56,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 07:02:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:56,138 INFO L225 Difference]: With dead ends: 80 [2020-12-22 07:02:56,138 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 07:02:56,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:02:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 07:02:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-12-22 07:02:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 07:02:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-12-22 07:02:56,176 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 79 [2020-12-22 07:02:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:56,177 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-12-22 07:02:56,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:02:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-12-22 07:02:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:02:56,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:56,182 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:56,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:56,398 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1447005449, now seen corresponding path program 4 times [2020-12-22 07:02:56,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:56,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354896494] [2020-12-22 07:02:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-22 07:02:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-22 07:02:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-22 07:02:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 198 proven. 308 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-12-22 07:02:56,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354896494] [2020-12-22 07:02:56,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829829358] [2020-12-22 07:02:56,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:56,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:02:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:02:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:02:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:02:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-22 07:02:57,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:02:57,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 22 [2020-12-22 07:02:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132430286] [2020-12-22 07:02:57,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 07:02:57,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 07:02:57,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-12-22 07:02:57,193 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 22 states. [2020-12-22 07:02:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:57,738 INFO L93 Difference]: Finished difference Result 143 states and 252 transitions. [2020-12-22 07:02:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 07:02:57,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 133 [2020-12-22 07:02:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:57,741 INFO L225 Difference]: With dead ends: 143 [2020-12-22 07:02:57,741 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 07:02:57,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 07:02:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 07:02:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-12-22 07:02:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 07:02:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-22 07:02:57,761 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 133 [2020-12-22 07:02:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:57,761 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-22 07:02:57,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 07:02:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-22 07:02:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 07:02:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:57,764 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:57,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 07:02:57,983 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash -292645265, now seen corresponding path program 5 times [2020-12-22 07:02:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265737628] [2020-12-22 07:02:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-22 07:02:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-22 07:02:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-22 07:02:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265737628] [2020-12-22 07:02:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180425612] [2020-12-22 07:02:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:58,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 07:02:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:02:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 07:02:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:02:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-22 07:02:58,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:02:58,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-12-22 07:02:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463987644] [2020-12-22 07:02:58,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 07:02:58,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:02:58,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 07:02:58,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:02:58,993 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 20 states. [2020-12-22 07:02:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:02:59,179 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-12-22 07:02:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 07:02:59,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2020-12-22 07:02:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:02:59,181 INFO L225 Difference]: With dead ends: 69 [2020-12-22 07:02:59,181 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 07:02:59,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 141 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:02:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 07:02:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-22 07:02:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 07:02:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-12-22 07:02:59,193 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 106 [2020-12-22 07:02:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:02:59,193 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-12-22 07:02:59,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 07:02:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-12-22 07:02:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:02:59,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:02:59,198 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:02:59,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:59,412 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:02:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:02:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 978812239, now seen corresponding path program 6 times [2020-12-22 07:02:59,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:02:59,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355554210] [2020-12-22 07:02:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:02:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:02:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-12-22 07:02:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-12-22 07:02:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-12-22 07:02:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:02:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-22 07:02:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-12-22 07:02:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:02:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 230 proven. 170 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-12-22 07:02:59,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355554210] [2020-12-22 07:02:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101527217] [2020-12-22 07:02:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:02:59,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 07:02:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:02:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 07:02:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:03:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-12-22 07:03:00,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:03:00,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2020-12-22 07:03:00,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14924366] [2020-12-22 07:03:00,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:03:00,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:03:00,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:03:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:03:00,049 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 17 states. [2020-12-22 07:03:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:03:00,347 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-12-22 07:03:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 07:03:00,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-12-22 07:03:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:03:00,348 INFO L225 Difference]: With dead ends: 124 [2020-12-22 07:03:00,348 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:03:00,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-12-22 07:03:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:03:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:03:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:03:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:03:00,350 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-12-22 07:03:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:03:00,351 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:03:00,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:03:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:03:00,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:03:00,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:03:00,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:03:01,028 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2020-12-22 07:03:01,032 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 07:03:01,032 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 07:03:01,032 INFO L185 CegarLoopUtils]: At program point L31(lines 25 32) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2020-12-22 07:03:01,032 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 07:03:01,032 INFO L189 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2020-12-22 07:03:01,032 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 07:03:01,032 INFO L189 CegarLoopUtils]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-12-22 07:03:01,032 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo_~n) (= fibo_~n |fibo_#in~n|)) [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L185 CegarLoopUtils]: At program point L13-2(line 13) the Hoare annotation is: (and (< 1 fibo_~n) (or (and (<= |fibo_#t~ret7| 2) (<= fibo_~n 4) (<= 2 |fibo_#t~ret7|) (<= 4 |fibo_#in~n|)) (and (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret7| 3) (<= 3 |fibo_#t~ret7|)) (and (<= |fibo_#t~ret7| 1) (<= 1 |fibo_#t~ret7|) (<= |fibo_#in~n| 3)) (<= 6 |fibo_#in~n|)) (= fibo_~n |fibo_#in~n|)) [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-12-22 07:03:01,033 INFO L189 CegarLoopUtils]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-12-22 07:03:01,034 INFO L189 CegarLoopUtils]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-12-22 07:03:01,034 INFO L192 CegarLoopUtils]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2020-12-22 07:03:01,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:03:01 BoogieIcfgContainer [2020-12-22 07:03:01,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:03:01,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:03:01,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:03:01,048 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:03:01,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:02:52" (3/4) ... [2020-12-22 07:03:01,051 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 07:03:01,057 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2020-12-22 07:03:01,062 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 07:03:01,062 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 07:03:01,062 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:03:01,062 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:03:01,101 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/fibo_5-1.c-witness.graphml [2020-12-22 07:03:01,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:03:01,103 INFO L168 Benchmark]: Toolchain (without parser) took 9383.59 ms. Allocated memory was 166.7 MB in the beginning and 272.6 MB in the end (delta: 105.9 MB). Free memory was 141.9 MB in the beginning and 242.7 MB in the end (delta: -100.8 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,103 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 166.7 MB. Free memory is still 138.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:03:01,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.31 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 132.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,105 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.80 ms. Allocated memory is still 166.7 MB. Free memory was 132.4 MB in the beginning and 131.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,106 INFO L168 Benchmark]: Boogie Preprocessor took 19.64 ms. Allocated memory is still 166.7 MB. Free memory was 131.2 MB in the beginning and 130.3 MB in the end (delta: 902.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,106 INFO L168 Benchmark]: RCFGBuilder took 409.77 ms. Allocated memory is still 166.7 MB. Free memory was 130.3 MB in the beginning and 118.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,109 INFO L168 Benchmark]: TraceAbstraction took 8521.42 ms. Allocated memory was 166.7 MB in the beginning and 272.6 MB in the end (delta: 105.9 MB). Free memory was 118.1 MB in the beginning and 245.3 MB in the end (delta: -127.2 MB). Peak memory consumption was 127.3 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,110 INFO L168 Benchmark]: Witness Printer took 53.18 ms. Allocated memory is still 272.6 MB. Free memory was 245.3 MB in the beginning and 242.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:03:01,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 166.7 MB. Free memory is still 138.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.31 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 132.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.80 ms. Allocated memory is still 166.7 MB. Free memory was 132.4 MB in the beginning and 131.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.64 ms. Allocated memory is still 166.7 MB. Free memory was 131.2 MB in the beginning and 130.3 MB in the end (delta: 902.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 409.77 ms. Allocated memory is still 166.7 MB. Free memory was 130.3 MB in the beginning and 118.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8521.42 ms. Allocated memory was 166.7 MB in the beginning and 272.6 MB in the end (delta: 105.9 MB). Free memory was 118.1 MB in the beginning and 245.3 MB in the end (delta: -127.2 MB). Peak memory consumption was 127.3 MB. Max. memory is 8.0 GB. * Witness Printer took 53.18 ms. Allocated memory is still 272.6 MB. Free memory was 245.3 MB in the beginning and 242.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 176 SDtfs, 313 SDslu, 773 SDs, 0 SdLazy, 1176 SolverSat, 326 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 826 GetRequests, 689 SyntacticMatches, 10 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 128 PreInvPairs, 195 NumberOfFragments, 62 HoareAnnotationTreeSize, 128 FomulaSimplifications, 561 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 835 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1091 NumberOfCodeBlocks, 1061 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1075 ConstructedInterpolants, 0 QuantifiedInterpolants, 252751 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1279 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 4092/5608 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...