/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/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:31:21,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:31:21,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:31:21,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:31:21,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:31:21,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:31:21,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:31:21,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:31:21,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:31:21,702 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:31:21,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:31:21,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:31:21,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:31:21,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:31:21,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:31:21,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:31:21,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:31:21,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:31:21,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:31:21,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:31:21,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:31:21,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:31:21,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:31:21,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:31:21,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:31:21,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:31:21,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:31:21,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:31:21,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:31:21,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:31:21,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:31:22,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:31:22,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:31:22,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:31:22,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:31:22,164 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:31:22,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/cggmp2005.i [2020-12-22 04:31:22,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63365125c/469ff786c15b4c038989f63148500a76/FLAGc4216081e [2020-12-22 04:31:22,840 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:31:22,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/cggmp2005.i [2020-12-22 04:31:22,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63365125c/469ff786c15b4c038989f63148500a76/FLAGc4216081e [2020-12-22 04:31:23,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63365125c/469ff786c15b4c038989f63148500a76 [2020-12-22 04:31:23,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:31:23,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:31:23,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:31:23,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:31:23,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:31:23,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d014fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23, skipping insertion in model container [2020-12-22 04:31:23,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:31:23,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:31:23,419 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/cggmp2005.i[895,908] [2020-12-22 04:31:23,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:31:23,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:31:23,451 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/cggmp2005.i[895,908] [2020-12-22 04:31:23,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:31:23,478 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:31:23,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23 WrapperNode [2020-12-22 04:31:23,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:31:23,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:31:23,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:31:23,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:31:23,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:31:23,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:31:23,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:31:23,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:31:23,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (1/1) ... [2020-12-22 04:31:23,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:31:23,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:31:23,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:31:23,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:31:23,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (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 04:31:23,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:31:23,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:31:23,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:31:23,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:31:23,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:31:23,886 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:31:23,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:23 BoogieIcfgContainer [2020-12-22 04:31:23,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:31:23,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:31:23,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:31:23,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:31:23,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:31:23" (1/3) ... [2020-12-22 04:31:23,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c9038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:31:23, skipping insertion in model container [2020-12-22 04:31:23,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:31:23" (2/3) ... [2020-12-22 04:31:23,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c9038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:31:23, skipping insertion in model container [2020-12-22 04:31:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:23" (3/3) ... [2020-12-22 04:31:23,900 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-12-22 04:31:23,907 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:31:23,913 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:31:23,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:31:23,968 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:31:23,969 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:31:23,969 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:31:23,969 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:31:23,969 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:31:23,969 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:31:23,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:31:23,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:31:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:31:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:31:23,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:23,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:31:23,995 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-22 04:31:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:24,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678632874] [2020-12-22 04:31:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:24,291 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 04:31:24,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678632874] [2020-12-22 04:31:24,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:31:24,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:31:24,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300949316] [2020-12-22 04:31:24,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:31:24,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:24,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:31:24,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:31:24,320 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-22 04:31:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:24,352 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:31:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:31:24,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:31:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:24,379 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:31:24,379 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:31:24,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:31:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:31:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:31:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:31:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 04:31:24,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-22 04:31:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:24,469 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 04:31:24,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:31:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 04:31:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:31:24,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:24,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:24,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:31:24,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-22 04:31:24,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:24,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847617757] [2020-12-22 04:31:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:24,563 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 04:31:24,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847617757] [2020-12-22 04:31:24,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032866241] [2020-12-22 04:31:24,565 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 04:31:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:31:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:24,797 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 04:31:24,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:24,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 04:31:24,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996861359] [2020-12-22 04:31:24,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:31:24,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:31:24,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:31:24,803 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2020-12-22 04:31:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:24,826 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-22 04:31:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:31:24,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-22 04:31:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:24,828 INFO L225 Difference]: With dead ends: 13 [2020-12-22 04:31:24,828 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:31:24,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:31:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:31:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:31:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:31:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:31:24,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:31:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:24,833 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:31:24,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:31:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:31:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:31:24,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:24,834 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:25,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:31:25,050 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-22 04:31:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:25,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40487647] [2020-12-22 04:31:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:25,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40487647] [2020-12-22 04:31:25,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415159643] [2020-12-22 04:31:25,133 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 04:31:25,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:31:25,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:31:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:25,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:25,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 04:31:25,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407745369] [2020-12-22 04:31:25,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:31:25,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:31:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:31:25,260 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2020-12-22 04:31:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:25,292 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 04:31:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:31:25,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-22 04:31:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:25,294 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:31:25,294 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:31:25,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:31:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:31:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:31:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:31:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:31:25,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 04:31:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:25,299 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:31:25,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:31:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:31:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:31:25,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:25,301 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:25,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:25,516 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:25,518 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-22 04:31:25,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:25,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726494944] [2020-12-22 04:31:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:25,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726494944] [2020-12-22 04:31:25,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749443736] [2020-12-22 04:31:25,624 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 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 04:31:25,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:31:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:25,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:31:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:25,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:25,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 04:31:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809515208] [2020-12-22 04:31:25,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:31:25,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:31:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:31:25,791 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2020-12-22 04:31:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:25,813 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:31:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:31:25,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-22 04:31:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:25,815 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:31:25,815 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:31:25,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:31:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:31:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:31:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:31:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:31:25,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-22 04:31:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:25,820 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:31:25,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:31:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:31:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:31:25,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:25,821 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:26,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:26,037 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:26,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-22 04:31:26,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:26,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675493587] [2020-12-22 04:31:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:26,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675493587] [2020-12-22 04:31:26,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838070312] [2020-12-22 04:31:26,199 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 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 04:31:26,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:31:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:31:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:26,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:31:26,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:31:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:26,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:26,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:31:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508117320] [2020-12-22 04:31:26,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:31:26,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:31:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:31:26,317 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2020-12-22 04:31:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:26,369 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:31:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:31:26,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-22 04:31:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:26,371 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:31:26,371 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:31:26,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:31:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:31:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:31:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:31:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 04:31:26,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-22 04:31:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:26,378 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 04:31:26,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:31:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 04:31:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:31:26,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:26,381 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:26,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:31:26,595 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-22 04:31:26,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:26,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794870023] [2020-12-22 04:31:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:26,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794870023] [2020-12-22 04:31:26,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79267150] [2020-12-22 04:31:26,673 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 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 04:31:26,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:31:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:31:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:26,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:31:26,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-12-22 04:31:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392320140] [2020-12-22 04:31:26,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:31:26,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:31:26,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:31:26,819 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2020-12-22 04:31:26,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:26,832 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-22 04:31:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:31:26,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 04:31:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:26,834 INFO L225 Difference]: With dead ends: 12 [2020-12-22 04:31:26,834 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:31:26,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:31:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:31:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:31:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:31:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:31:26,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-12-22 04:31:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:26,836 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:31:26,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:31:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:31:26,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:31:27,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:31:27,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:31:27,160 INFO L192 CegarLoopUtils]: At program point L33(lines 24 34) the Hoare annotation is: true [2020-12-22 04:31:27,161 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:31:27,161 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-22 04:31:27,161 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:31:27,161 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:31:27,161 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:31:27,161 INFO L185 CegarLoopUtils]: At program point L28-2(lines 28 31) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~i~0 1) (<= ULTIMATE.start_main_~j~0 10) (<= 10 ULTIMATE.start_main_~j~0)) (and (< 5 ULTIMATE.start_main_~j~0) (<= 9 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6)) (and (<= ULTIMATE.start_main_~j~0 7) (<= 7 ULTIMATE.start_main_~j~0) (<= 7 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 7)) (and (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~j~0 8) (<= 8 ULTIMATE.start_main_~j~0) (<= 5 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 9) (<= 9 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 3) (<= 3 ULTIMATE.start_main_~i~0))) [2020-12-22 04:31:27,162 INFO L189 CegarLoopUtils]: For program point L28-3(lines 28 31) no Hoare annotation was computed. [2020-12-22 04:31:27,162 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-22 04:31:27,162 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-22 04:31:27,162 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-12-22 04:31:27,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:31:27 BoogieIcfgContainer [2020-12-22 04:31:27,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:31:27,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:31:27,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:31:27,182 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:31:27,183 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:31:23" (3/4) ... [2020-12-22 04:31:27,187 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:31:27,197 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-22 04:31:27,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:31:27,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:31:27,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:31:27,233 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/cggmp2005.i-witness.graphml [2020-12-22 04:31:27,233 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:31:27,235 INFO L168 Benchmark]: Toolchain (without parser) took 4019.88 ms. Allocated memory was 168.8 MB in the beginning and 208.7 MB in the end (delta: 39.8 MB). Free memory was 144.0 MB in the beginning and 135.3 MB in the end (delta: 8.6 MB). Peak memory consumption was 49.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,236 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 168.8 MB. Free memory is still 140.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:31:27,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.59 ms. Allocated memory is still 168.8 MB. Free memory was 143.8 MB in the beginning and 134.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,238 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.42 ms. Allocated memory is still 168.8 MB. Free memory was 134.2 MB in the beginning and 133.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,238 INFO L168 Benchmark]: Boogie Preprocessor took 42.48 ms. Allocated memory is still 168.8 MB. Free memory was 133.0 MB in the beginning and 131.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,239 INFO L168 Benchmark]: RCFGBuilder took 322.42 ms. Allocated memory is still 168.8 MB. Free memory was 131.9 MB in the beginning and 121.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,240 INFO L168 Benchmark]: TraceAbstraction took 3290.46 ms. Allocated memory was 168.8 MB in the beginning and 208.7 MB in the end (delta: 39.8 MB). Free memory was 120.9 MB in the beginning and 138.0 MB in the end (delta: -17.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,240 INFO L168 Benchmark]: Witness Printer took 51.51 ms. Allocated memory is still 208.7 MB. Free memory was 138.0 MB in the beginning and 135.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:31:27,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 168.8 MB. Free memory is still 140.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.59 ms. Allocated memory is still 168.8 MB. Free memory was 143.8 MB in the beginning and 134.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.42 ms. Allocated memory is still 168.8 MB. Free memory was 134.2 MB in the beginning and 133.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.48 ms. Allocated memory is still 168.8 MB. Free memory was 133.0 MB in the beginning and 131.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.42 ms. Allocated memory is still 168.8 MB. Free memory was 131.9 MB in the beginning and 121.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3290.46 ms. Allocated memory was 168.8 MB in the beginning and 208.7 MB in the end (delta: 39.8 MB). Free memory was 120.9 MB in the beginning and 138.0 MB in the end (delta: -17.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Witness Printer took 51.51 ms. Allocated memory is still 208.7 MB. Free memory was 138.0 MB in the beginning and 135.3 MB in the end (delta: 2.6 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: (((((i == 1 && j <= 10) && 10 <= j) || ((5 < j && 9 <= i) && j <= 6)) || (((j <= 7 && 7 <= j) && 7 <= i) && i <= 7)) || (((i <= 5 && j <= 8) && 8 <= j) && 5 <= i)) || (((j <= 9 && 9 <= j) && i <= 3) && 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, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 1 SDslu, 63 SDs, 0 SdLazy, 105 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=5, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 62 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 96 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 2584 SizeOfPredicates, 8 NumberOfNonLiveVariables, 237 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 26/70 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...