/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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:21:17,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:21:17,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:21:17,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:21:17,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:21:17,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:21:17,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:21:17,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:21:17,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:17,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:17,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:17,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 04:21:18,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:21:18,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:21:18,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:21:18,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:18,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:18,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:18,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:18,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:18,103 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:18,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:18,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:18,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:18,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:18,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:18,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:18,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:18,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:18,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:18,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:18,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:18,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:18,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:18,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:18,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:18,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:18,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:18,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:18,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:18,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:18,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:18,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:18,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:18,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:18,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:18,564 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:18,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum_array-2.i [2020-12-22 04:21:18,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f8ae7b9/c12fe3115c7e41ef98acb22894adb84a/FLAG75c502fdc [2020-12-22 04:21:19,297 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:19,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2.i [2020-12-22 04:21:19,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f8ae7b9/c12fe3115c7e41ef98acb22894adb84a/FLAG75c502fdc [2020-12-22 04:21:19,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f8ae7b9/c12fe3115c7e41ef98acb22894adb84a [2020-12-22 04:21:19,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:19,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:19,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:19,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:19,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:19,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211ad354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19, skipping insertion in model container [2020-12-22 04:21:19,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:19,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:19,832 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/loops/sum_array-2.i[938,951] [2020-12-22 04:21:19,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:19,863 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:19,875 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/loops/sum_array-2.i[938,951] [2020-12-22 04:21:19,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:19,903 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:19,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19 WrapperNode [2020-12-22 04:21:19,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:19,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:19,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:19,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:19,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:19,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:19,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:19,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:19,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (1/1) ... [2020-12-22 04:21:19,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:19,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:19,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:19,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:19,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (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 04:21:20,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:20,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:20,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:21:20,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:20,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:20,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:21:20,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:21:20,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:20,481 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 04:21:20,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:20 BoogieIcfgContainer [2020-12-22 04:21:20,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:20,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:20,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:20,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:20,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:19" (1/3) ... [2020-12-22 04:21:20,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bd8c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:20, skipping insertion in model container [2020-12-22 04:21:20,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:19" (2/3) ... [2020-12-22 04:21:20,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bd8c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:20, skipping insertion in model container [2020-12-22 04:21:20,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:20" (3/3) ... [2020-12-22 04:21:20,522 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2020-12-22 04:21:20,530 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:20,535 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:20,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:20,589 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:20,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:20,590 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:20,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:20,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:20,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:20,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:20,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 04:21:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:21:20,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:20,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:20,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1741268329, now seen corresponding path program 1 times [2020-12-22 04:21:20,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:20,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786463594] [2020-12-22 04:21:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:20,921 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 04:21:20,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786463594] [2020-12-22 04:21:20,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:20,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:21:20,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143904598] [2020-12-22 04:21:20,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:21:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:21:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:20,951 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-22 04:21:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:20,976 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2020-12-22 04:21:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:21:20,978 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-22 04:21:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:21,002 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:21:21,003 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:21:21,009 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 04:21:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:21:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:21:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:21:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-22 04:21:21,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-12-22 04:21:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:21,050 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-22 04:21:21,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:21:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-22 04:21:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:21:21,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:21,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:21,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:21:21,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -217285445, now seen corresponding path program 1 times [2020-12-22 04:21:21,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:21,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363002813] [2020-12-22 04:21:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:21,322 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 04:21:21,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363002813] [2020-12-22 04:21:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:21,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:21:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563263591] [2020-12-22 04:21:21,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:21:21,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:21:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:21,326 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-12-22 04:21:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:21,419 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-22 04:21:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:21,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 04:21:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:21,421 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:21:21,421 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:21:21,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:21:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2020-12-22 04:21:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:21:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-22 04:21:21,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2020-12-22 04:21:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:21,429 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-22 04:21:21,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:21:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-22 04:21:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:21:21,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:21,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:21,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:21:21,431 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:21,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2020776544, now seen corresponding path program 1 times [2020-12-22 04:21:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:21,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887165509] [2020-12-22 04:21:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:21:22,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887165509] [2020-12-22 04:21:22,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454041681] [2020-12-22 04:21:22,248 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 04:21:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:22,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:21:22,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:22,507 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2020-12-22 04:21:22,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:22,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:22,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:22,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2020-12-22 04:21:22,633 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:22,634 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 32 [2020-12-22 04:21:22,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:22,676 INFO L625 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2020-12-22 04:21:22,677 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:22,678 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-22 04:21:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:21:22,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:22,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:21:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817802364] [2020-12-22 04:21:22,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:21:22,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:21:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:21:22,818 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-12-22 04:21:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:22,999 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-22 04:21:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:21:22,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-22 04:21:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:23,001 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:21:23,001 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:21:23,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:21:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:21:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-22 04:21:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:21:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-22 04:21:23,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2020-12-22 04:21:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:23,008 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-22 04:21:23,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:21:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-22 04:21:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:21:23,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:23,009 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:23,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:21:23,214 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1709087114, now seen corresponding path program 1 times [2020-12-22 04:21:23,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:23,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574182148] [2020-12-22 04:21:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:21:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574182148] [2020-12-22 04:21:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398867847] [2020-12-22 04:21:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:23,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:21:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:21:23,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:23,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-22 04:21:23,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293813662] [2020-12-22 04:21:23,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:21:23,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:21:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:21:23,573 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-12-22 04:21:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:23,741 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-12-22 04:21:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:21:23,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-22 04:21:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:23,743 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:21:23,743 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:21:23,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:21:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:21:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-22 04:21:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:21:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-22 04:21:23,751 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-12-22 04:21:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:23,751 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-22 04:21:23,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:21:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-22 04:21:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:21:23,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:23,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:23,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:23,967 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:23,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1108233645, now seen corresponding path program 2 times [2020-12-22 04:21:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:23,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513494761] [2020-12-22 04:21:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:25,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513494761] [2020-12-22 04:21:25,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173246347] [2020-12-22 04:21:25,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:25,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:25,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:21:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:25,128 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2020-12-22 04:21:25,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,146 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,146 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2020-12-22 04:21:25,209 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 04:21:25,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,221 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,222 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-22 04:21:25,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-22 04:21:25,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,277 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:16 [2020-12-22 04:21:25,292 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 04:21:25,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,302 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-22 04:21:25,329 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2020-12-22 04:21:25,332 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,346 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-22 04:21:25,452 INFO L348 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2020-12-22 04:21:25,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 56 [2020-12-22 04:21:25,463 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,477 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,478 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,479 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-22 04:21:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:25,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:25,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-22 04:21:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682141899] [2020-12-22 04:21:25,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:21:25,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:21:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:21:25,793 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 22 states. [2020-12-22 04:21:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:27,781 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-22 04:21:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:21:27,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-12-22 04:21:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:27,782 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:21:27,783 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:21:27,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:21:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:21:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-12-22 04:21:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:21:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-22 04:21:27,792 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2020-12-22 04:21:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:27,793 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-22 04:21:27,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:21:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-22 04:21:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:21:27,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:27,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:28,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:28,009 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -626687997, now seen corresponding path program 3 times [2020-12-22 04:21:28,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:28,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267095905] [2020-12-22 04:21:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:21:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267095905] [2020-12-22 04:21:28,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916566933] [2020-12-22 04:21:28,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:28,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:21:28,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:28,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:21:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:21:28,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:28,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-22 04:21:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414048236] [2020-12-22 04:21:28,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:21:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:21:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:21:28,514 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 11 states. [2020-12-22 04:21:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:28,789 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2020-12-22 04:21:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:21:28,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-22 04:21:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:28,791 INFO L225 Difference]: With dead ends: 103 [2020-12-22 04:21:28,791 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:21:28,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:21:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:21:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-12-22 04:21:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:21:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-22 04:21:28,801 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-12-22 04:21:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:28,802 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-22 04:21:28,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:21:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-22 04:21:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:21:28,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:28,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:29,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:29,011 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:29,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:29,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1732581416, now seen corresponding path program 4 times [2020-12-22 04:21:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:29,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991524785] [2020-12-22 04:21:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:29,925 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 04:21:31,266 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-22 04:21:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991524785] [2020-12-22 04:21:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886354039] [2020-12-22 04:21:31,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:31,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:21:31,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:31,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:21:31,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:31,954 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2020-12-22 04:21:31,956 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:31,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:31,966 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:31,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2020-12-22 04:21:32,354 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-22 04:21:32,355 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:32,371 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:32,373 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:32,374 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:23 [2020-12-22 04:21:32,504 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:21:32,509 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:32,509 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 50 [2020-12-22 04:21:32,514 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:32,547 INFO L625 ElimStorePlain]: treesize reduction 30, result has 63.9 percent of original size [2020-12-22 04:21:32,548 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:32,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-22 04:21:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:21:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:21:32,744 INFO L348 Elim1Store]: treesize reduction 54, result has 37.2 percent of original size [2020-12-22 04:21:32,744 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 108 [2020-12-22 04:21:32,748 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:32,817 INFO L625 ElimStorePlain]: treesize reduction 64, result has 59.5 percent of original size [2020-12-22 04:21:32,818 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:32,818 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:94 [2020-12-22 04:21:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:21:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:21:33,076 INFO L348 Elim1Store]: treesize reduction 60, result has 40.6 percent of original size [2020-12-22 04:21:33,076 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 68 treesize of output 112 [2020-12-22 04:21:33,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:33,129 INFO L625 ElimStorePlain]: treesize reduction 58, result has 57.4 percent of original size [2020-12-22 04:21:33,130 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:33,130 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2020-12-22 04:21:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:33,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:33,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-22 04:21:33,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487008549] [2020-12-22 04:21:33,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:21:33,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:21:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:21:33,765 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 40 states. [2020-12-22 04:21:35,066 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 04:21:35,276 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-12-22 04:21:35,752 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-12-22 04:21:36,033 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-12-22 04:21:36,399 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-12-22 04:21:36,680 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-12-22 04:21:37,221 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-12-22 04:21:37,746 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-12-22 04:21:38,143 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 69 [2020-12-22 04:21:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:38,482 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-12-22 04:21:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:21:38,483 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-22 04:21:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:38,485 INFO L225 Difference]: With dead ends: 128 [2020-12-22 04:21:38,485 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:21:38,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=586, Invalid=4384, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:21:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:21:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-12-22 04:21:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:21:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-22 04:21:38,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2020-12-22 04:21:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:38,498 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-22 04:21:38,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:21:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-22 04:21:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:21:38,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:38,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:38,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:21:38,714 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1525407304, now seen corresponding path program 5 times [2020-12-22 04:21:38,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:38,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979510484] [2020-12-22 04:21:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 04:21:39,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979510484] [2020-12-22 04:21:39,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189953399] [2020-12-22 04:21:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true