/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/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:31:15,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:31:15,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:31:15,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:31:15,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:31:15,821 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:31:15,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:31:15,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:31:15,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:31:15,825 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:31:15,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:31:15,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:31:15,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:31:15,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:31:15,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:31:15,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:31:15,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:31:15,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:31:15,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:31:15,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:31:15,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:31:15,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:31:15,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:31:15,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:31:15,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:31:15,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:31:15,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:31:15,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:31:15,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:31:15,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:31:15,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:31:16,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:31:16,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:31:16,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:31:16,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:31:16,314 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:31:16,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/bhmr2007.i [2020-12-22 04:31:16,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5d41234/d6a5029e3d404aa2a8e2bb68fc5c745e/FLAG6d0b0d878 [2020-12-22 04:31:17,126 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:31:17,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/bhmr2007.i [2020-12-22 04:31:17,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5d41234/d6a5029e3d404aa2a8e2bb68fc5c745e/FLAG6d0b0d878 [2020-12-22 04:31:17,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5d41234/d6a5029e3d404aa2a8e2bb68fc5c745e [2020-12-22 04:31:17,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:31:17,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:31:17,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:31:17,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:31:17,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:31:17,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1131e200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17, skipping insertion in model container [2020-12-22 04:31:17,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:31:17,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:31:17,761 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/loop-lit/bhmr2007.i[895,908] [2020-12-22 04:31:17,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:31:17,785 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:31:17,802 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/loop-lit/bhmr2007.i[895,908] [2020-12-22 04:31:17,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:31:17,825 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:31:17,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17 WrapperNode [2020-12-22 04:31:17,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:31:17,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:31:17,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:31:17,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:31:17,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:31:17,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:31:17,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:31:17,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:31:17,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (1/1) ... [2020-12-22 04:31:17,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:31:17,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:31:17,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:31:17,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:31:17,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (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 04:31:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:31:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:31:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:31:17,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:31:18,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:31:18,210 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:31:18,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:18 BoogieIcfgContainer [2020-12-22 04:31:18,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:31:18,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:31:18,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:31:18,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:31:18,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:31:17" (1/3) ... [2020-12-22 04:31:18,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d187c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:31:18, skipping insertion in model container [2020-12-22 04:31:18,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:17" (2/3) ... [2020-12-22 04:31:18,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d187c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:31:18, skipping insertion in model container [2020-12-22 04:31:18,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:18" (3/3) ... [2020-12-22 04:31:18,221 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-12-22 04:31:18,228 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:31:18,233 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:31:18,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:31:18,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:31:18,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:31:18,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:31:18,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:31:18,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:31:18,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:31:18,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:31:18,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:31:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-22 04:31:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:31:18,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:18,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:18,344 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:18,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1807304968, now seen corresponding path program 1 times [2020-12-22 04:31:18,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:18,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885862861] [2020-12-22 04:31:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:18,540 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 04:31:18,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885862861] [2020-12-22 04:31:18,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:31:18,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:31:18,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669277259] [2020-12-22 04:31:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:31:18,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:18,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:31:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:31:18,566 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-22 04:31:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:18,583 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-22 04:31:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:31:18,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 04:31:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:18,593 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:31:18,593 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:31:18,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:31:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:31:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:31:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:31:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:31:18,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-12-22 04:31:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:18,631 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:31:18,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:31:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:31:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:31:18,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:18,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:18,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:31:18,632 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1806977267, now seen corresponding path program 1 times [2020-12-22 04:31:18,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:18,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879268492] [2020-12-22 04:31:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:18,795 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 04:31:18,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879268492] [2020-12-22 04:31:18,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:31:18,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:31:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575197712] [2020-12-22 04:31:18,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:31:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:31:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:31:18,800 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 6 states. [2020-12-22 04:31:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:18,872 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-22 04:31:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:31:18,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-22 04:31:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:18,874 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:31:18,875 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:31:18,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:31:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:31:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:31:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:31:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-22 04:31:18,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2020-12-22 04:31:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:18,880 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-22 04:31:18,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:31:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-22 04:31:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:31:18,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:18,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:18,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:31:18,882 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 78673311, now seen corresponding path program 1 times [2020-12-22 04:31:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:18,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622311976] [2020-12-22 04:31:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:19,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622311976] [2020-12-22 04:31:19,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182675676] [2020-12-22 04:31:19,036 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 04:31:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:31:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:19,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:31:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:19,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:19,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-22 04:31:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179322039] [2020-12-22 04:31:19,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:31:19,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:31:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:31:19,308 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 12 states. [2020-12-22 04:31:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:19,470 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-12-22 04:31:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:31:19,471 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-22 04:31:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:19,472 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:31:19,472 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:31:19,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:31:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:31:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2020-12-22 04:31:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:31:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 04:31:19,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-12-22 04:31:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:19,479 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 04:31:19,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:31:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 04:31:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:31:19,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:19,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:19,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:31:19,695 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash 243464563, now seen corresponding path program 2 times [2020-12-22 04:31:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:19,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745510155] [2020-12-22 04:31:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:19,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745510155] [2020-12-22 04:31:19,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081031267] [2020-12-22 04:31:19,985 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 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 04:31:20,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:31:20,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:20,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:31:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:20,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:20,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-22 04:31:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230244706] [2020-12-22 04:31:20,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:31:20,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:20,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:31:20,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:31:20,224 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 17 states. [2020-12-22 04:31:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:20,710 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2020-12-22 04:31:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:31:20,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 04:31:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:20,711 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:31:20,712 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:31:20,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:31:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:31:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-12-22 04:31:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:31:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 04:31:20,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2020-12-22 04:31:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:20,719 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 04:31:20,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:31:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 04:31:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:31:20,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:20,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:20,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:20,932 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:20,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1072091937, now seen corresponding path program 1 times [2020-12-22 04:31:20,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:20,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424671619] [2020-12-22 04:31:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:31:21,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424671619] [2020-12-22 04:31:21,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256546073] [2020-12-22 04:31:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:31:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:21,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:31:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:21,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:21,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-12-22 04:31:21,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570019383] [2020-12-22 04:31:21,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:31:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:31:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:31:21,401 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 20 states. [2020-12-22 04:31:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:22,127 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-22 04:31:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:31:22,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2020-12-22 04:31:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:22,128 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:31:22,128 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:31:22,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:31:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:31:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:31:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:31:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:31:22,130 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-12-22 04:31:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:22,131 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:31:22,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:31:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:31:22,131 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:31:22,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:22,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:31:22,432 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:31:22,432 INFO L189 CegarLoopUtils]: For program point L29(lines 29 35) no Hoare annotation was computed. [2020-12-22 04:31:22,432 INFO L189 CegarLoopUtils]: For program point L27(line 27) no Hoare annotation was computed. [2020-12-22 04:31:22,432 INFO L189 CegarLoopUtils]: For program point L29-2(lines 29 35) no Hoare annotation was computed. [2020-12-22 04:31:22,432 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-22 04:31:22,433 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:31:22,433 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:31:22,433 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:31:22,433 INFO L185 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse1 (* 3 ULTIMATE.start_main_~i~0))) (and (< .cse0 (+ (* 3 ULTIMATE.start_main_~n~0) 1)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-12-22 04:31:22,433 INFO L189 CegarLoopUtils]: For program point L28-3(lines 28 37) no Hoare annotation was computed. [2020-12-22 04:31:22,433 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-22 04:31:22,434 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-22 04:31:22,434 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-12-22 04:31:22,434 INFO L192 CegarLoopUtils]: At program point L39(lines 24 40) the Hoare annotation is: true [2020-12-22 04:31:22,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:31:22 BoogieIcfgContainer [2020-12-22 04:31:22,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:31:22,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:31:22,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:31:22,471 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:31:22,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:18" (3/4) ... [2020-12-22 04:31:22,476 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:31:22,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-22 04:31:22,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:31:22,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:31:22,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:31:22,568 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/bhmr2007.i-witness.graphml [2020-12-22 04:31:22,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:31:22,572 INFO L168 Benchmark]: Toolchain (without parser) took 5061.40 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 135.9 MB in the beginning and 121.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:22,575 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 160.4 MB. Free memory is still 132.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:31:22,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.55 ms. Allocated memory is still 160.4 MB. Free memory was 135.7 MB in the beginning and 126.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:22,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.96 ms. Allocated memory is still 160.4 MB. Free memory was 126.0 MB in the beginning and 124.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:22,578 INFO L168 Benchmark]: Boogie Preprocessor took 21.38 ms. Allocated memory is still 160.4 MB. Free memory was 124.6 MB in the beginning and 123.8 MB in the end (delta: 831.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:31:22,582 INFO L168 Benchmark]: RCFGBuilder took 322.86 ms. Allocated memory is still 160.4 MB. Free memory was 123.6 MB in the beginning and 112.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:22,583 INFO L168 Benchmark]: TraceAbstraction took 4255.54 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 111.8 MB in the beginning and 123.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:22,584 INFO L168 Benchmark]: Witness Printer took 97.59 ms. Allocated memory is still 192.9 MB. Free memory was 123.7 MB in the beginning and 121.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:22,588 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 160.4 MB. Free memory is still 132.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 314.55 ms. Allocated memory is still 160.4 MB. Free memory was 135.7 MB in the beginning and 126.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.96 ms. Allocated memory is still 160.4 MB. Free memory was 126.0 MB in the beginning and 124.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.38 ms. Allocated memory is still 160.4 MB. Free memory was 124.6 MB in the beginning and 123.8 MB in the end (delta: 831.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 322.86 ms. Allocated memory is still 160.4 MB. Free memory was 123.6 MB in the beginning and 112.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4255.54 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 111.8 MB in the beginning and 123.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Witness Printer took 97.59 ms. Allocated memory is still 192.9 MB. Free memory was 123.7 MB in the beginning and 121.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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: 28]: Loop Invariant Derived loop invariant: (a + b < 3 * n + 1 && 3 * i <= a + b) && a + b <= 3 * i - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 54 SDslu, 80 SDs, 0 SdLazy, 459 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 11 NumberOfFragments, 26 HoareAnnotationTreeSize, 3 FomulaSimplifications, 147 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 139 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 10155 SizeOfPredicates, 15 NumberOfNonLiveVariables, 196 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/36 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...