/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/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:19:56,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:19:56,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:19:56,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:19:56,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:19:56,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:19:56,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:19:56,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:19:56,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:19:56,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:19:56,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:19:56,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 04:19:57,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:19:57,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:19:57,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:19:57,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:19:57,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:19:57,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:19:57,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:19:57,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:19:57,043 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:19:57,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:19:57,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:19:57,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:19:57,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:19:57,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:19:57,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:19:57,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:19:57,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:19:57,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:19:57,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:19:57,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:19:57,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:19:57,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:19:57,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:19:57,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:19:57,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:19:57,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:19:57,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:19:57,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:19:57,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:19:57,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:19:57,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:19:57,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:19:57,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:19:57,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:19:57,562 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:19:57,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_search.c [2020-12-22 04:19:57,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d41d07d/fcd0cb538d7c44998bafd98cbfa532c2/FLAGdf183976c [2020-12-22 04:19:58,373 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:19:58,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_search.c [2020-12-22 04:19:58,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d41d07d/fcd0cb538d7c44998bafd98cbfa532c2/FLAGdf183976c [2020-12-22 04:19:58,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d41d07d/fcd0cb538d7c44998bafd98cbfa532c2 [2020-12-22 04:19:58,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:19:58,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:19:58,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:19:58,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:19:58,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:19:58,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:19:58" (1/1) ... [2020-12-22 04:19:58,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4bce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:58, skipping insertion in model container [2020-12-22 04:19:58,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:19:58" (1/1) ... [2020-12-22 04:19:58,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:19:58,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:19:58,948 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/linear_search.c[358,371] [2020-12-22 04:19:58,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:19:58,981 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:19:59,000 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/linear_search.c[358,371] [2020-12-22 04:19:59,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:19:59,028 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:19:59,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59 WrapperNode [2020-12-22 04:19:59,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:19:59,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:19:59,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:19:59,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:19:59,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:19:59,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:19:59,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:19:59,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:19:59,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (1/1) ... [2020-12-22 04:19:59,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:19:59,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:19:59,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:19:59,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:19:59,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (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 04:19:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:19:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:19:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:19:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 04:19:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:19:59,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:19:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:19:59,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:19:59,572 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 04:19:59,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:19:59 BoogieIcfgContainer [2020-12-22 04:19:59,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:19:59,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:19:59,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:19:59,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:19:59,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:19:58" (1/3) ... [2020-12-22 04:19:59,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c30bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:19:59, skipping insertion in model container [2020-12-22 04:19:59,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:59" (2/3) ... [2020-12-22 04:19:59,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c30bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:19:59, skipping insertion in model container [2020-12-22 04:19:59,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:19:59" (3/3) ... [2020-12-22 04:19:59,586 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.c [2020-12-22 04:19:59,598 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:19:59,640 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:19:59,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:19:59,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:19:59,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:19:59,740 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:19:59,740 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:19:59,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:19:59,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:19:59,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:19:59,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:19:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 04:19:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:19:59,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:59,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:59,768 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash 138500705, now seen corresponding path program 1 times [2020-12-22 04:19:59,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:59,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473497917] [2020-12-22 04:19:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:00,014 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 04:20:00,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473497917] [2020-12-22 04:20:00,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:00,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:20:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388097524] [2020-12-22 04:20:00,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:20:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:00,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:20:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:20:00,047 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-22 04:20:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:00,083 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2020-12-22 04:20:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:20:00,086 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 04:20:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:00,117 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:20:00,118 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:20:00,123 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 04:20:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:20:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:20:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:20:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2020-12-22 04:20:00,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2020-12-22 04:20:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:00,170 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-12-22 04:20:00,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:20:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2020-12-22 04:20:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:20:00,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:00,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:00,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:20:00,176 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:00,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash -316927884, now seen corresponding path program 1 times [2020-12-22 04:20:00,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:00,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789577048] [2020-12-22 04:20:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:00,409 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 04:20:00,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789577048] [2020-12-22 04:20:00,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:00,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:20:00,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886746638] [2020-12-22 04:20:00,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:20:00,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:20:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:00,415 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 4 states. [2020-12-22 04:20:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:00,467 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-22 04:20:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:20:00,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 04:20:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:00,469 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:20:00,469 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:20:00,470 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 04:20:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:20:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:20:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:20:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-22 04:20:00,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2020-12-22 04:20:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:00,473 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-22 04:20:00,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:20:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-22 04:20:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:20:00,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:00,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:00,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:20:00,475 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash -316868302, now seen corresponding path program 1 times [2020-12-22 04:20:00,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:00,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089026884] [2020-12-22 04:20:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:00,631 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 04:20:00,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089026884] [2020-12-22 04:20:00,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:00,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:20:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157944429] [2020-12-22 04:20:00,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:20:00,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:20:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:00,634 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-12-22 04:20:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:00,680 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-22 04:20:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:20:00,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 04:20:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:00,681 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:20:00,681 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:20:00,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:20:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 04:20:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:20:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-22 04:20:00,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2020-12-22 04:20:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:00,687 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-22 04:20:00,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:20:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-22 04:20:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:20:00,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:00,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:00,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:20:00,689 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1526315956, now seen corresponding path program 1 times [2020-12-22 04:20:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:00,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723611815] [2020-12-22 04:20:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:00,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723611815] [2020-12-22 04:20:00,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:00,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:20:00,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235832199] [2020-12-22 04:20:00,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:20:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:20:00,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:00,783 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2020-12-22 04:20:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:00,824 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-22 04:20:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:20:00,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 04:20:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:00,826 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:20:00,826 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:20:00,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:20:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2020-12-22 04:20:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:20:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-22 04:20:00,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 14 [2020-12-22 04:20:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:00,832 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-22 04:20:00,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:20:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-22 04:20:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:20:00,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:00,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:00,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:20:00,834 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:00,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1959304714, now seen corresponding path program 1 times [2020-12-22 04:20:00,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:00,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595418304] [2020-12-22 04:20:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:00,996 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 04:20:00,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595418304] [2020-12-22 04:20:00,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868224177] [2020-12-22 04:20:00,997 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 04:20:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:20:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:01,238 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 04:20:01,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:01,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2020-12-22 04:20:01,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715626156] [2020-12-22 04:20:01,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:20:01,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:01,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:20:01,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:20:01,241 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 7 states. [2020-12-22 04:20:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:01,302 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-22 04:20:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:20:01,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:20:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:01,304 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:20:01,304 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:20:01,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:20:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:20:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:20:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:20:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-22 04:20:01,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2020-12-22 04:20:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:01,310 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-22 04:20:01,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:20:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-22 04:20:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:20:01,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:01,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:01,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:01,526 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:01,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1914944804, now seen corresponding path program 1 times [2020-12-22 04:20:01,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:01,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095178152] [2020-12-22 04:20:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:01,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095178152] [2020-12-22 04:20:01,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865567627] [2020-12-22 04:20:01,636 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 04:20:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:20:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:01,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:01,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:20:01,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692167216] [2020-12-22 04:20:01,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:20:01,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:20:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:20:01,775 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-22 04:20:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:01,834 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-12-22 04:20:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:20:01,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-22 04:20:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:01,836 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:20:01,836 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:20:01,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:20:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:20:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2020-12-22 04:20:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:20:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 04:20:01,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 18 [2020-12-22 04:20:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:01,841 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 04:20:01,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:20:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 04:20:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:20:01,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:01,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:02,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:02,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1105598178, now seen corresponding path program 2 times [2020-12-22 04:20:02,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:02,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832474162] [2020-12-22 04:20:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:20:02,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832474162] [2020-12-22 04:20:02,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455404925] [2020-12-22 04:20:02,299 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 04:20:02,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 04:20:02,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:20:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:20:02,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:02,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 04:20:02,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514213136] [2020-12-22 04:20:02,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:20:02,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:02,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:20:02,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:20:02,515 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 10 states. [2020-12-22 04:20:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:02,698 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-12-22 04:20:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:20:02,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:20:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:02,699 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:20:02,699 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:20:02,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:20:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:20:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:20:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:20:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-22 04:20:02,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-12-22 04:20:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:02,706 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-22 04:20:02,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:20:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-22 04:20:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:20:02,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:02,707 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:02,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:02,922 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1162856480, now seen corresponding path program 1 times [2020-12-22 04:20:02,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:02,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132412403] [2020-12-22 04:20:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:03,431 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-12-22 04:20:03,611 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 04:20:03,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132412403] [2020-12-22 04:20:03,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516356778] [2020-12-22 04:20:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:20:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:20:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:03,770 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-22 04:20:03,772 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:03,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:03,787 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:03,788 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-22 04:20:03,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:04,000 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:04,001 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 32 [2020-12-22 04:20:04,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:04,006 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:04,020 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:04,021 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 31 [2020-12-22 04:20:04,028 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:04,126 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2020-12-22 04:20:04,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:04,129 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:107, output treesize:61 [2020-12-22 04:20:04,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:04,671 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 04:20:04,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:04,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-12-22 04:20:04,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165085305] [2020-12-22 04:20:04,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:20:04,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:20:04,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:20:04,674 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 13 states. [2020-12-22 04:20:05,056 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-12-22 04:20:05,271 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-12-22 04:20:05,464 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-12-22 04:20:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:05,740 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-12-22 04:20:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:20:05,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-12-22 04:20:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:05,744 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:20:05,744 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:20:05,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:20:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:20:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-22 04:20:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:20:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-22 04:20:05,751 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-12-22 04:20:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:05,752 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-22 04:20:05,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:20:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-22 04:20:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:20:05,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:05,753 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:05,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:05,967 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 319994682, now seen corresponding path program 1 times [2020-12-22 04:20:05,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:05,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526187497] [2020-12-22 04:20:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:06,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526187497] [2020-12-22 04:20:06,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754631122] [2020-12-22 04:20:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:20:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:20:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:06,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:06,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:20:06,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292238781] [2020-12-22 04:20:06,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:20:06,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:20:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:20:06,178 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2020-12-22 04:20:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:06,272 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-22 04:20:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:20:06,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-22 04:20:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:06,274 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:20:06,274 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:20:06,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:20:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:20:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-12-22 04:20:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:20:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-12-22 04:20:06,280 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-12-22 04:20:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:06,281 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-12-22 04:20:06,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:20:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-12-22 04:20:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:20:06,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:06,282 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:06,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:06,496 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1500469194, now seen corresponding path program 2 times [2020-12-22 04:20:06,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:06,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320783048] [2020-12-22 04:20:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:20:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320783048] [2020-12-22 04:20:06,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:06,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:20:06,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768796785] [2020-12-22 04:20:06,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:20:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:20:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:20:06,562 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-12-22 04:20:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:06,584 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-12-22 04:20:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:20:06,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-22 04:20:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:06,589 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:20:06,589 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:20:06,590 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 04:20:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:20:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:20:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:20:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 04:20:06,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2020-12-22 04:20:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:06,605 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 04:20:06,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:20:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 04:20:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:20:06,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:06,607 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:06,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 04:20:06,611 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:06,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1594500078, now seen corresponding path program 2 times [2020-12-22 04:20:06,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:06,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827235703] [2020-12-22 04:20:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:06,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827235703] [2020-12-22 04:20:06,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425176714] [2020-12-22 04:20:06,760 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:06,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:20:06,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:20:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:06,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:06,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:20:06,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302259421] [2020-12-22 04:20:06,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:20:06,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:06,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:20:06,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:20:06,912 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-12-22 04:20:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:07,026 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-22 04:20:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:20:07,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 04:20:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:07,028 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:20:07,028 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:20:07,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:20:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:20:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-12-22 04:20:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:20:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-22 04:20:07,034 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-12-22 04:20:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:07,035 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-22 04:20:07,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:20:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-22 04:20:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:20:07,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:07,036 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:07,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:07,250 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1891120592, now seen corresponding path program 3 times [2020-12-22 04:20:07,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:07,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713768566] [2020-12-22 04:20:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:07,820 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-12-22 04:20:08,001 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 52 [2020-12-22 04:20:08,298 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 63 [2020-12-22 04:20:08,673 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2020-12-22 04:20:09,133 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 65 [2020-12-22 04:20:09,589 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 58 [2020-12-22 04:20:09,909 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-12-22 04:20:10,269 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-12-22 04:20:10,504 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 27 [2020-12-22 04:20:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:10,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713768566] [2020-12-22 04:20:10,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714999433] [2020-12-22 04:20:10,863 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:11,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:20:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:20:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:11,231 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-22 04:20:11,232 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:11,267 INFO L625 ElimStorePlain]: treesize reduction 4, result has 91.3 percent of original size [2020-12-22 04:20:11,268 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:11,269 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2020-12-22 04:20:12,074 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,144 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,145 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 62 [2020-12-22 04:20:12,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:12,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:12,156 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,232 INFO L348 Elim1Store]: treesize reduction 22, result has 69.9 percent of original size [2020-12-22 04:20:12,233 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 61 [2020-12-22 04:20:12,239 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:12,244 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,457 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 04:20:12,458 INFO L625 ElimStorePlain]: treesize reduction 19, result has 85.6 percent of original size [2020-12-22 04:20:12,461 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:12,461 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:173, output treesize:113 [2020-12-22 04:20:12,778 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 04:20:13,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:13,415 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:20:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:13,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:13,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 04:20:13,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410417697] [2020-12-22 04:20:13,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:20:13,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:13,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:20:13,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:20:13,544 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 25 states. [2020-12-22 04:20:14,467 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 42 [2020-12-22 04:20:14,726 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2020-12-22 04:20:15,021 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 49 [2020-12-22 04:20:15,319 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-12-22 04:20:15,811 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 59 [2020-12-22 04:20:16,154 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-12-22 04:20:16,507 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-12-22 04:20:16,857 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-12-22 04:20:17,123 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2020-12-22 04:20:17,958 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-12-22 04:20:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:18,084 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-12-22 04:20:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:20:18,085 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2020-12-22 04:20:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:18,086 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:20:18,086 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:20:18,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:20:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:20:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-12-22 04:20:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:20:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 04:20:18,093 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 26 [2020-12-22 04:20:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:18,094 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 04:20:18,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:20:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 04:20:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:20:18,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:18,095 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:18,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:18,300 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:18,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1412223210, now seen corresponding path program 3 times [2020-12-22 04:20:18,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:18,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053049587] [2020-12-22 04:20:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:18,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053049587] [2020-12-22 04:20:18,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505926497] [2020-12-22 04:20:18,429 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:18,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:20:18,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:20:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:18,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:18,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:20:18,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2932418] [2020-12-22 04:20:18,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:20:18,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:20:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:20:18,728 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states. [2020-12-22 04:20:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:18,884 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-22 04:20:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:20:18,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-22 04:20:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:18,885 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:20:18,885 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:20:18,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:20:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:20:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:20:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:20:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-22 04:20:18,892 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2020-12-22 04:20:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:18,892 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-22 04:20:18,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:20:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-22 04:20:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:20:18,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:18,894 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:19,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:20:19,101 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash -156395070, now seen corresponding path program 4 times [2020-12-22 04:20:19,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:19,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688186499] [2020-12-22 04:20:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:19,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688186499] [2020-12-22 04:20:19,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821019739] [2020-12-22 04:20:19,219 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:19,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:20:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:20:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:19,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:19,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:20:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507551642] [2020-12-22 04:20:19,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:20:19,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:20:19,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:20:19,367 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-12-22 04:20:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:19,616 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-12-22 04:20:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:20:19,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 04:20:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:19,619 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:20:19,619 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:20:19,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:20:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:20:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-12-22 04:20:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:20:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-22 04:20:19,626 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-12-22 04:20:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:19,626 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-22 04:20:19,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:20:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-22 04:20:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:20:19,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:19,627 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:19,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:19,842 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash -965741696, now seen corresponding path program 4 times [2020-12-22 04:20:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:19,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157343237] [2020-12-22 04:20:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:20,470 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-12-22 04:20:20,929 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 63 [2020-12-22 04:20:21,240 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 63 [2020-12-22 04:20:21,620 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 73 [2020-12-22 04:20:22,139 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 65 [2020-12-22 04:20:22,484 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2020-12-22 04:20:22,933 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2020-12-22 04:20:23,408 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 50 [2020-12-22 04:20:23,792 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 43 [2020-12-22 04:20:24,048 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-12-22 04:20:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:24,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157343237] [2020-12-22 04:20:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423908267] [2020-12-22 04:20:24,232 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:24,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:20:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:20:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:24,413 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-22 04:20:24,417 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:24,429 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:24,430 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:24,431 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-22 04:20:25,801 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:20:25,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:25,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:25,920 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:25,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 109 [2020-12-22 04:20:25,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:25,927 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:25,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:25,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:26,180 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-22 04:20:26,181 INFO L348 Elim1Store]: treesize reduction 34, result has 82.4 percent of original size [2020-12-22 04:20:26,181 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 178 [2020-12-22 04:20:26,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:20:26,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,209 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,211 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,213 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,215 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,219 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,224 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:20:26,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:26,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,239 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:26,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:26,255 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:26,487 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-12-22 04:20:26,488 INFO L625 ElimStorePlain]: treesize reduction 424, result has 22.2 percent of original size [2020-12-22 04:20:26,489 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:26,489 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:155, output treesize:121 [2020-12-22 04:20:27,378 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:20:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:27,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:27,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-12-22 04:20:27,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064256398] [2020-12-22 04:20:27,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:20:27,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:20:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:20:27,673 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 25 states. [2020-12-22 04:20:28,088 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-12-22 04:20:28,337 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-12-22 04:20:28,759 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-12-22 04:20:29,204 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-12-22 04:20:29,657 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-12-22 04:20:30,148 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-12-22 04:20:30,646 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-12-22 04:20:31,352 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2020-12-22 04:20:31,824 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-12-22 04:20:32,223 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-12-22 04:20:32,935 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 79 [2020-12-22 04:20:33,416 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2020-12-22 04:20:34,006 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2020-12-22 04:20:34,859 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-12-22 04:20:35,738 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-12-22 04:20:36,641 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-12-22 04:20:37,320 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2020-12-22 04:20:37,962 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2020-12-22 04:20:38,578 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-12-22 04:20:39,299 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-22 04:20:39,815 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 04:20:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:40,695 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-22 04:20:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:20:40,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-12-22 04:20:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:40,697 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:20:40,697 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:20:40,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:20:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:20:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-12-22 04:20:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:20:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-22 04:20:40,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 34 [2020-12-22 04:20:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:40,709 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-22 04:20:40,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:20:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-22 04:20:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:20:40,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:40,711 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:40,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:20:40,915 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1735276186, now seen corresponding path program 5 times [2020-12-22 04:20:40,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:40,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696330133] [2020-12-22 04:20:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:41,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696330133] [2020-12-22 04:20:41,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900509698] [2020-12-22 04:20:41,071 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:41,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 04:20:41,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:20:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:41,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:41,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:41,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-12-22 04:20:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4055062] [2020-12-22 04:20:41,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:20:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:20:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:20:41,774 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 15 states. [2020-12-22 04:20:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:42,159 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-12-22 04:20:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:20:42,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-12-22 04:20:42,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:42,161 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:20:42,161 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:20:42,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:20:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:20:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:20:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:20:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-22 04:20:42,171 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 38 [2020-12-22 04:20:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:42,171 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-22 04:20:42,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:20:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-22 04:20:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:20:42,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:42,172 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:42,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:20:42,380 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash 442804082, now seen corresponding path program 6 times [2020-12-22 04:20:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:42,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814123843] [2020-12-22 04:20:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:42,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814123843] [2020-12-22 04:20:42,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708008920] [2020-12-22 04:20:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:43,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 04:20:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:20:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:43,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:43,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:20:43,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243108670] [2020-12-22 04:20:43,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:20:43,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:20:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:20:43,347 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 12 states. [2020-12-22 04:20:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:43,716 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-22 04:20:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:20:43,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-12-22 04:20:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:43,717 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:20:43,718 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:20:43,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:20:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:20:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:20:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:20:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-22 04:20:43,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2020-12-22 04:20:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:43,726 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-22 04:20:43,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:20:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-22 04:20:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:20:43,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:43,727 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:43,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:20:43,939 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1735988150, now seen corresponding path program 7 times [2020-12-22 04:20:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:43,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715996906] [2020-12-22 04:20:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:44,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715996906] [2020-12-22 04:20:44,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975168935] [2020-12-22 04:20:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:20:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:44,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:44,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:20:44,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819825261] [2020-12-22 04:20:44,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:20:44,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:20:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:20:44,321 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2020-12-22 04:20:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:44,746 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-12-22 04:20:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:20:44,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-22 04:20:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:44,747 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:20:44,748 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:20:44,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:20:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:20:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-22 04:20:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:20:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-22 04:20:44,757 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-12-22 04:20:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:44,757 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-22 04:20:44,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:20:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-22 04:20:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:20:44,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:44,758 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:44,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:20:44,960 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1749632520, now seen corresponding path program 5 times [2020-12-22 04:20:44,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:44,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982067314] [2020-12-22 04:20:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:45,764 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-12-22 04:20:46,224 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-12-22 04:20:46,558 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-12-22 04:20:46,995 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-12-22 04:20:47,460 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 73 [2020-12-22 04:20:48,104 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 65 [2020-12-22 04:20:48,528 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 47 [2020-12-22 04:20:48,907 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2020-12-22 04:20:49,249 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 47 [2020-12-22 04:20:49,887 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 52 [2020-12-22 04:20:50,466 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 53 [2020-12-22 04:20:50,989 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 46 [2020-12-22 04:20:51,531 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 58 [2020-12-22 04:20:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:51,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982067314] [2020-12-22 04:20:51,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817820160] [2020-12-22 04:20:51,846 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:52,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:20:52,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:20:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:52,671 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-22 04:20:52,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,687 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:52,688 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-22 04:20:53,885 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 04:20:55,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:20:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:55,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:55,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:55,138 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:55,138 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 104 [2020-12-22 04:20:55,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,156 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:55,381 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 04:20:55,382 INFO L348 Elim1Store]: treesize reduction 36, result has 78.7 percent of original size [2020-12-22 04:20:55,383 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 151 [2020-12-22 04:20:55,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:55,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:55,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:55,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:55,394 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:55,618 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-22 04:20:55,619 INFO L625 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2020-12-22 04:20:55,620 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:55,620 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:177, output treesize:133 [2020-12-22 04:20:55,908 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-22 04:20:57,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:57,405 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:20:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:57,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:57,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 35 [2020-12-22 04:20:57,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803576020] [2020-12-22 04:20:57,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:20:57,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:20:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1115, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:20:57,725 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 35 states. [2020-12-22 04:20:58,075 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-22 04:20:58,351 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-22 04:20:58,707 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-22 04:20:59,103 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-12-22 04:20:59,470 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 04:20:59,880 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-12-22 04:21:00,302 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-12-22 04:21:00,748 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-12-22 04:21:01,174 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-12-22 04:21:01,703 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 04:21:02,230 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-12-22 04:21:02,777 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2020-12-22 04:21:03,319 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-12-22 04:21:04,139 WARN L197 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-12-22 04:21:04,796 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2020-12-22 04:21:05,514 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-12-22 04:21:06,049 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-12-22 04:21:06,471 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-12-22 04:21:06,963 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-12-22 04:21:07,423 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-12-22 04:21:07,923 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 44 [2020-12-22 04:21:08,361 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-12-22 04:21:08,892 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-12-22 04:21:09,366 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-12-22 04:21:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:09,844 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-22 04:21:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:21:09,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-12-22 04:21:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:09,847 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:21:09,847 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:21:09,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:21:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:21:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:21:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:21:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 04:21:09,858 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2020-12-22 04:21:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:09,858 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 04:21:09,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:21:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 04:21:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:21:09,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:09,859 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:10,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:10,063 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:10,064 INFO L82 PathProgramCache]: Analyzing trace with hash -3472094, now seen corresponding path program 8 times [2020-12-22 04:21:10,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:10,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730551655] [2020-12-22 04:21:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:10,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730551655] [2020-12-22 04:21:10,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443855927] [2020-12-22 04:21:10,335 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:10,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:10,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:10,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:21:10,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:10,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:10,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:21:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469800505] [2020-12-22 04:21:10,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:21:10,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:21:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:21:10,555 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2020-12-22 04:21:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:11,233 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-12-22 04:21:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:21:11,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-12-22 04:21:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:11,236 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:21:11,236 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:21:11,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:21:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:21:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2020-12-22 04:21:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:21:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-22 04:21:11,246 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-12-22 04:21:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:11,247 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-22 04:21:11,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:21:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-22 04:21:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:21:11,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:11,248 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:11,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:11,462 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:11,463 INFO L82 PathProgramCache]: Analyzing trace with hash -812818720, now seen corresponding path program 6 times [2020-12-22 04:21:11,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:11,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806549605] [2020-12-22 04:21:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:12,274 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 51 [2020-12-22 04:21:12,726 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 62 [2020-12-22 04:21:13,085 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 62 [2020-12-22 04:21:13,536 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 69 [2020-12-22 04:21:13,937 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-12-22 04:21:14,634 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 73 [2020-12-22 04:21:15,738 WARN L197 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 88 [2020-12-22 04:21:16,544 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 74 [2020-12-22 04:21:17,163 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 56 [2020-12-22 04:21:17,853 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 55 [2020-12-22 04:21:18,640 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 56 [2020-12-22 04:21:19,207 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-12-22 04:21:19,975 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 55 [2020-12-22 04:21:20,455 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 38 [2020-12-22 04:21:20,803 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 21 [2020-12-22 04:21:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:21,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806549605] [2020-12-22 04:21:21,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609924041] [2020-12-22 04:21:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:22,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 04:21:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:21:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:22,957 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-22 04:21:22,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:22,985 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:22,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:22,987 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-22 04:21:23,963 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 04:21:25,030 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 04:21:26,877 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 04:21:26,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:27,196 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 04:21:27,197 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:27,197 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 122 [2020-12-22 04:21:27,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:27,614 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-12-22 04:21:27,615 INFO L348 Elim1Store]: treesize reduction 138, result has 42.7 percent of original size [2020-12-22 04:21:27,616 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 121 [2020-12-22 04:21:27,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:27,625 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:28,260 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-12-22 04:21:28,261 INFO L625 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2020-12-22 04:21:28,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:21:28,263 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:207, output treesize:173 [2020-12-22 04:21:29,236 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 04:21:31,557 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-12-22 04:21:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:31,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:31,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2020-12-22 04:21:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799876270] [2020-12-22 04:21:31,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:21:31,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:31,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:21:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:21:31,593 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 39 states. [2020-12-22 04:21:31,999 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 31 [2020-12-22 04:21:32,293 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-12-22 04:21:32,703 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-12-22 04:21:33,076 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2020-12-22 04:21:33,564 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-12-22 04:21:34,229 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-12-22 04:21:34,789 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-12-22 04:21:35,236 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-12-22 04:21:35,896 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-12-22 04:21:36,573 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-12-22 04:21:37,277 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-12-22 04:21:37,868 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-12-22 04:21:38,563 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2020-12-22 04:21:39,816 WARN L197 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 78 [2020-12-22 04:21:41,344 WARN L197 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 85 [2020-12-22 04:21:43,554 WARN L197 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 148 DAG size of output: 92 [2020-12-22 04:21:44,431 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-22 04:21:45,244 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-22 04:21:46,225 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-22 04:21:47,047 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-22 04:21:48,019 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-22 04:21:48,830 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-22 04:21:49,712 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-12-22 04:21:50,488 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-12-22 04:21:51,114 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-12-22 04:21:51,669 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2020-12-22 04:21:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:52,392 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-22 04:21:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:21:52,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-12-22 04:21:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:52,394 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:21:52,394 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:21:52,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=366, Invalid=4056, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:21:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:21:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:21:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:21:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-22 04:21:52,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 50 [2020-12-22 04:21:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:52,405 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-22 04:21:52,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:21:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-22 04:21:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:21:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:52,406 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:52,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:52,611 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2094599686, now seen corresponding path program 9 times [2020-12-22 04:21:52,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:52,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567020054] [2020-12-22 04:21:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567020054] [2020-12-22 04:21:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658756916] [2020-12-22 04:21:52,988 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:53,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:21:53,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:53,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:21:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:53,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:53,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:21:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361486714] [2020-12-22 04:21:53,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:21:53,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:21:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:21:53,885 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 15 states. [2020-12-22 04:21:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:54,822 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-12-22 04:21:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:21:54,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-12-22 04:21:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:54,827 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:21:54,827 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:21:54,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:21:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:21:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:21:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:21:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-22 04:21:54,847 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2020-12-22 04:21:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:54,847 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-22 04:21:54,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:21:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-22 04:21:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:21:54,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:54,848 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:55,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:21:55,052 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash -359615790, now seen corresponding path program 10 times [2020-12-22 04:21:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:55,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842051664] [2020-12-22 04:21:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:55,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842051664] [2020-12-22 04:21:55,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735955314] [2020-12-22 04:21:55,477 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:55,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:21:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:21:55,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:55,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:55,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:21:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504424218] [2020-12-22 04:21:55,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:21:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:21:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:21:55,744 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2020-12-22 04:21:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:56,839 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-12-22 04:21:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:21:56,841 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-12-22 04:21:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:56,842 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:21:56,843 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:21:56,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:21:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:21:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-12-22 04:21:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:21:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-12-22 04:21:56,850 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-12-22 04:21:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:56,850 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-12-22 04:21:56,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:21:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-12-22 04:21:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:21:56,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:56,851 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:57,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:21:57,066 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1168962416, now seen corresponding path program 7 times [2020-12-22 04:21:57,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:57,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977193390] [2020-12-22 04:21:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:57,685 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 50 [2020-12-22 04:21:58,022 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 57 [2020-12-22 04:21:58,275 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 54 [2020-12-22 04:21:58,567 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 64 [2020-12-22 04:21:58,853 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 64 [2020-12-22 04:21:59,184 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 67 [2020-12-22 04:21:59,519 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 66 [2020-12-22 04:21:59,900 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 67 [2020-12-22 04:22:00,438 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2020-12-22 04:22:01,288 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 74 [2020-12-22 04:22:01,836 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 67 [2020-12-22 04:22:02,226 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-12-22 04:22:02,610 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2020-12-22 04:22:03,021 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-12-22 04:22:03,459 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-12-22 04:22:04,072 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2020-12-22 04:22:04,743 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-12-22 04:22:05,110 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2020-12-22 04:22:05,505 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 21 [2020-12-22 04:22:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 12 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977193390] [2020-12-22 04:22:05,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29444485] [2020-12-22 04:22:05,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 04:22:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:06,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-22 04:22:06,456 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:22:06,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:22:06,484 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:22:06,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-22 04:22:08,498 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 04:22:08,845 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 04:22:09,655 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 04:22:10,719 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-22 04:22:11,300 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-22 04:22:12,475 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 04:22:12,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:22:12,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:12,636 INFO L244 Elim1Store]: Index analysis took 129 ms [2020-12-22 04:22:14,510 WARN L197 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 04:22:14,511 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:22:14,512 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 176 [2020-12-22 04:22:14,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:14,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:14,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:14,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:14,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:14,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:14,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:22:17,241 WARN L197 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-12-22 04:22:17,242 INFO L348 Elim1Store]: treesize reduction 232, result has 50.5 percent of original size [2020-12-22 04:22:17,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 105 treesize of output 263 [2020-12-22 04:22:17,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,251 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:22:17,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:22:17,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:17,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:17,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,265 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:22:17,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:17,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:17,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:17,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:17,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:17,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:17,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:17,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:17,294 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:22:18,755 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 04:22:18,757 INFO L625 ElimStorePlain]: treesize reduction 266, result has 46.3 percent of original size [2020-12-22 04:22:18,759 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:22:18,759 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:273, output treesize:229 [2020-12-22 04:22:20,190 WARN L197 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 04:22:21,289 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 04:22:21,840 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 04:22:22,687 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 04:22:23,169 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 04:22:25,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:26,348 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-12-22 04:22:26,403 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:22:26,600 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:22:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:27,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:27,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 50 [2020-12-22 04:22:27,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031661178] [2020-12-22 04:22:27,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:22:27,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:22:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2334, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:22:27,057 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 50 states. [2020-12-22 04:22:27,722 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-12-22 04:22:28,159 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-12-22 04:22:28,803 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 39 [2020-12-22 04:22:29,420 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2020-12-22 04:22:29,998 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-12-22 04:22:30,587 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 43 [2020-12-22 04:22:31,213 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-22 04:22:31,883 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2020-12-22 04:22:32,521 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-12-22 04:22:33,183 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2020-12-22 04:22:33,917 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2020-12-22 04:22:34,757 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2020-12-22 04:22:35,604 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2020-12-22 04:22:36,494 WARN L197 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2020-12-22 04:22:37,386 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 69 [2020-12-22 04:22:38,778 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 70 [2020-12-22 04:22:40,191 WARN L197 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 80 [2020-12-22 04:22:41,829 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 76 [2020-12-22 04:22:43,318 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 77 [2020-12-22 04:22:45,188 WARN L197 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2020-12-22 04:22:46,003 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-12-22 04:22:46,834 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 46 [2020-12-22 04:22:47,740 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-12-22 04:22:48,617 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-12-22 04:22:49,686 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-12-22 04:22:50,727 WARN L197 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2020-12-22 04:22:51,583 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-12-22 04:22:52,403 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-12-22 04:22:53,266 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 46 [2020-12-22 04:22:54,055 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-12-22 04:22:54,885 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 38 [2020-12-22 04:22:55,574 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-12-22 04:22:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:56,697 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-12-22 04:22:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:22:56,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-12-22 04:22:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:56,700 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:22:56,700 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:22:56,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 23 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=428, Invalid=6544, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:22:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:22:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:22:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:22:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-22 04:22:56,715 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-12-22 04:22:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:56,715 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-22 04:22:56,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:22:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-22 04:22:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:22:56,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:56,716 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:56,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:22:56,922 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:56,923 INFO L82 PathProgramCache]: Analyzing trace with hash 318654378, now seen corresponding path program 11 times [2020-12-22 04:22:56,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:56,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207504576] [2020-12-22 04:22:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 39 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:57,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207504576] [2020-12-22 04:22:57,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136131369] [2020-12-22 04:22:57,459 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:00,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-22 04:23:00,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:00,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:23:00,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 39 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:01,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:01,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:23:01,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288634881] [2020-12-22 04:23:01,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:23:01,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:23:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:23:01,043 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 17 states. [2020-12-22 04:23:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:02,771 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-12-22 04:23:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:23:02,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-12-22 04:23:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:02,775 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:23:02,775 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:23:02,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:23:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:23:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:23:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:23:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-12-22 04:23:02,791 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2020-12-22 04:23:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:02,791 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-12-22 04:23:02,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:23:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-12-22 04:23:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:23:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:02,792 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:02,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:23:02,993 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1852158082, now seen corresponding path program 12 times [2020-12-22 04:23:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:02,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409816093] [2020-12-22 04:23:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 42 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409816093] [2020-12-22 04:23:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745478687] [2020-12-22 04:23:03,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:06,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 04:23:06,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:23:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 42 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:06,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:06,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:23:06,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35521493] [2020-12-22 04:23:06,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:23:06,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:23:06,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:23:06,686 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2020-12-22 04:23:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:08,704 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-12-22 04:23:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:23:08,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-12-22 04:23:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:08,709 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:23:08,709 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:23:08,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:23:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:23:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-12-22 04:23:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:23:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-22 04:23:08,718 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-12-22 04:23:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:08,718 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-22 04:23:08,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:23:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-22 04:23:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:23:08,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:08,719 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:23:08,924 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1042811456, now seen corresponding path program 8 times [2020-12-22 04:23:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:08,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45720462] [2020-12-22 04:23:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:00,409 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 52 [2020-12-22 04:24:00,903 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 70 [2020-12-22 04:24:01,715 WARN L197 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 63 [2020-12-22 04:24:02,601 WARN L197 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 72 [2020-12-22 04:24:03,711 WARN L197 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 76 [2020-12-22 04:24:04,803 WARN L197 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 75 [2020-12-22 04:24:05,613 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 66 [2020-12-22 04:24:06,508 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 67 [2020-12-22 04:24:08,261 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 207 DAG size of output: 73