/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:51:19,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:51:19,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:51:19,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:51:19,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:51:19,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:51:19,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:51:19,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:51:19,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:51:19,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:51:19,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:51:19,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:51:19,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:51:19,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:51:19,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:51:19,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:51:19,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:51:19,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:51:19,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:51:19,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:51:19,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:51:19,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:51:19,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:51:19,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:51:19,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:51:19,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:51:19,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:51:19,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:51:19,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:51:19,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:51:19,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:51:19,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:51:19,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:51:19,977 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:51:19,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:51:19,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:51:19,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:51:19,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:51:19,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:51:19,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:51:19,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:51:19,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:51:19,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:51:19,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:51:19,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:51:19,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:51:19,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:51:19,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:51:19,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:51:19,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:51:19,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:51:19,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:51:19,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:51:19,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:51:19,985 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:51:20,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:51:20,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:51:20,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:51:20,475 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:51:20,476 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:51:20,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-2.c [2020-12-23 06:51:20,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ebb7826ea/af080f68b885408b87543e98cab460d1/FLAGe027e1f30 [2020-12-23 06:51:21,229 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:51:21,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2020-12-23 06:51:21,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ebb7826ea/af080f68b885408b87543e98cab460d1/FLAGe027e1f30 [2020-12-23 06:51:21,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ebb7826ea/af080f68b885408b87543e98cab460d1 [2020-12-23 06:51:21,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:51:21,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:51:21,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:21,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:51:21,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:51:21,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4847a6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21, skipping insertion in model container [2020-12-23 06:51:21,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:51:21,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:51:21,782 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 06:51:21,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:21,812 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:51:21,828 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 06:51:21,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:21,849 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:51:21,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21 WrapperNode [2020-12-23 06:51:21,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:21,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:21,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:51:21,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:51:21,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:21,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:51:21,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:51:21,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:51:21,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... [2020-12-23 06:51:21,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:51:21,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:51:21,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:51:21,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:51:21,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:51:22,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:51:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:51:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:51:22,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:51:22,377 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:51:22,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:22 BoogieIcfgContainer [2020-12-23 06:51:22,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:51:22,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:51:22,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:51:22,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:51:22,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:51:21" (1/3) ... [2020-12-23 06:51:22,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68267f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:22, skipping insertion in model container [2020-12-23 06:51:22,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:21" (2/3) ... [2020-12-23 06:51:22,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68267f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:22, skipping insertion in model container [2020-12-23 06:51:22,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:22" (3/3) ... [2020-12-23 06:51:22,398 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-12-23 06:51:22,407 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:51:22,414 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:51:22,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:51:22,518 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:51:22,518 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:51:22,518 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:51:22,518 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:51:22,518 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:51:22,518 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:51:22,519 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:51:22,519 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:51:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:51:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:51:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:22,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:51:22,567 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2020-12-23 06:51:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:22,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029963023] [2020-12-23 06:51:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:22,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029963023] [2020-12-23 06:51:22,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:22,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487024187] [2020-12-23 06:51:22,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:22,936 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 06:51:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:22,988 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2020-12-23 06:51:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:22,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:51:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:23,001 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:51:23,002 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:51:23,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:51:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-23 06:51:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:51:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:51:23,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 06:51:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:23,045 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:51:23,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:51:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:51:23,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:23,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:23,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:51:23,047 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2020-12-23 06:51:23,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:23,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449898582] [2020-12-23 06:51:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:23,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449898582] [2020-12-23 06:51:23,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:23,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:23,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929549374] [2020-12-23 06:51:23,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:23,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:23,109 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-23 06:51:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:23,139 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-23 06:51:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:23,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 06:51:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:23,142 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:23,142 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:51:23,144 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 [2020-12-23 06:51:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:51:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 06:51:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:51:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-23 06:51:23,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-23 06:51:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:23,153 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-23 06:51:23,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-23 06:51:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:51:23,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:23,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:23,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:51:23,154 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2020-12-23 06:51:23,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:23,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137591047] [2020-12-23 06:51:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:23,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137591047] [2020-12-23 06:51:23,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118275377] [2020-12-23 06:51:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:51:23,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:23,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:23,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 06:51:23,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261881598] [2020-12-23 06:51:23,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:23,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:23,422 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-12-23 06:51:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:23,602 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-12-23 06:51:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:23,605 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-23 06:51:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:23,606 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:51:23,606 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:51:23,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:51:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-23 06:51:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:51:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 06:51:23,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 06:51:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:23,626 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 06:51:23,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 06:51:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:51:23,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:23,628 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:23,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:51:23,829 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:23,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:23,830 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 2 times [2020-12-23 06:51:23,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:23,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516709678] [2020-12-23 06:51:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:51:24,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516709678] [2020-12-23 06:51:24,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78511288] [2020-12-23 06:51:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:24,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:24,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:51:24,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:51:24,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:24,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 06:51:24,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945200408] [2020-12-23 06:51:24,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:51:24,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:51:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:51:24,195 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-23 06:51:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:24,580 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-12-23 06:51:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:51:24,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 06:51:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:24,584 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:51:24,585 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:51:24,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:51:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-12-23 06:51:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:51:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 06:51:24,611 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-23 06:51:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:24,611 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 06:51:24,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:51:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 06:51:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:51:24,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:24,613 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:24,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:24,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1517479077, now seen corresponding path program 3 times [2020-12-23 06:51:24,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:24,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634174595] [2020-12-23 06:51:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 06:51:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634174595] [2020-12-23 06:51:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188721346] [2020-12-23 06:51:25,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:25,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:51:25,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:25,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:51:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 06:51:25,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:25,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:51:25,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462527677] [2020-12-23 06:51:25,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:25,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:25,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:25,177 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-12-23 06:51:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:25,209 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-23 06:51:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:51:25,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 06:51:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:25,211 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:51:25,211 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:51:25,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:51:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 06:51:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:51:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 06:51:25,219 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-12-23 06:51:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:25,220 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 06:51:25,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 06:51:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:51:25,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:25,221 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:25,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:25,435 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:25,437 INFO L82 PathProgramCache]: Analyzing trace with hash 640077219, now seen corresponding path program 4 times [2020-12-23 06:51:25,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:25,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664705470] [2020-12-23 06:51:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 06:51:25,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664705470] [2020-12-23 06:51:25,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450845761] [2020-12-23 06:51:25,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:25,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:51:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 06:51:25,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:25,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:51:25,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388805376] [2020-12-23 06:51:25,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:51:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:51:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:51:25,678 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-12-23 06:51:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:25,726 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-23 06:51:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:51:25,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-23 06:51:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:25,728 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:51:25,728 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:51:25,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:51:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:51:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:51:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:51:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-23 06:51:25,736 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2020-12-23 06:51:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:25,736 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-23 06:51:25,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:51:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-23 06:51:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:51:25,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:25,738 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:25,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:25,952 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1692920805, now seen corresponding path program 5 times [2020-12-23 06:51:25,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:25,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752245055] [2020-12-23 06:51:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-23 06:51:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752245055] [2020-12-23 06:51:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594639823] [2020-12-23 06:51:26,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:26,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:51:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:26,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:51:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 06:51:26,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:26,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:51:26,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591893990] [2020-12-23 06:51:26,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:51:26,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:51:26,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:26,237 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2020-12-23 06:51:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:26,297 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-23 06:51:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:51:26,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-23 06:51:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:26,299 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:51:26,299 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:51:26,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:51:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 06:51:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:51:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-23 06:51:26,308 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-12-23 06:51:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:26,309 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-23 06:51:26,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:51:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-23 06:51:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:51:26,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:26,310 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:26,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:51:26,519 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:26,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash 628096867, now seen corresponding path program 6 times [2020-12-23 06:51:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:26,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696539789] [2020-12-23 06:51:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-23 06:51:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696539789] [2020-12-23 06:51:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612232371] [2020-12-23 06:51:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:26,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 06:51:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:51:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 153 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 06:51:26,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:26,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:51:26,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965549978] [2020-12-23 06:51:26,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:51:26,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:51:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:26,914 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-12-23 06:51:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:26,986 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-23 06:51:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:51:26,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-23 06:51:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:26,990 INFO L225 Difference]: With dead ends: 61 [2020-12-23 06:51:26,990 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:51:26,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:51:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 06:51:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:51:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 06:51:27,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2020-12-23 06:51:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:27,004 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 06:51:27,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:51:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 06:51:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:51:27,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:27,013 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:27,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:27,226 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1950432475, now seen corresponding path program 7 times [2020-12-23 06:51:27,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:27,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093859133] [2020-12-23 06:51:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 06:51:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093859133] [2020-12-23 06:51:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477584935] [2020-12-23 06:51:27,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:51:27,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 06:51:27,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:27,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:51:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415316707] [2020-12-23 06:51:27,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:27,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:27,583 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 11 states. [2020-12-23 06:51:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:27,674 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-12-23 06:51:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:27,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 06:51:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:27,678 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:51:27,678 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:51:27,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:51:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 06:51:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:51:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-23 06:51:27,701 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2020-12-23 06:51:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:27,701 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-23 06:51:27,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-23 06:51:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:51:27,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:27,703 INFO L422 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:27,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:27,918 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1424432861, now seen corresponding path program 8 times [2020-12-23 06:51:27,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:27,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119542169] [2020-12-23 06:51:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-12-23 06:51:28,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119542169] [2020-12-23 06:51:28,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518777726] [2020-12-23 06:51:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:28,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:51:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-23 06:51:28,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:28,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 06:51:28,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184719134] [2020-12-23 06:51:28,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:51:28,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:28,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:51:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:51:28,282 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 15 states. [2020-12-23 06:51:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:29,262 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-12-23 06:51:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:51:29,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-23 06:51:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:29,270 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:51:29,270 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:51:29,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:51:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:51:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-12-23 06:51:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:51:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-12-23 06:51:29,281 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 39 [2020-12-23 06:51:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:29,281 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-12-23 06:51:29,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:51:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-12-23 06:51:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:51:29,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:29,282 INFO L422 BasicCegarLoop]: trace histogram [36, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:29,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:51:29,496 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash 230023508, now seen corresponding path program 9 times [2020-12-23 06:51:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:29,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650278566] [2020-12-23 06:51:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 304 proven. 45 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2020-12-23 06:51:29,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650278566] [2020-12-23 06:51:29,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149602864] [2020-12-23 06:51:29,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:30,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:51:30,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:51:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 307 proven. 45 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-23 06:51:30,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:30,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:51:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597729692] [2020-12-23 06:51:30,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:51:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:51:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:30,229 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2020-12-23 06:51:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:30,324 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-12-23 06:51:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:51:30,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-23 06:51:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:30,325 INFO L225 Difference]: With dead ends: 101 [2020-12-23 06:51:30,325 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 06:51:30,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 06:51:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 06:51:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:51:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-23 06:51:30,336 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 54 [2020-12-23 06:51:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:30,336 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-23 06:51:30,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:51:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-23 06:51:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:51:30,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:30,338 INFO L422 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:30,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:30,549 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1228631464, now seen corresponding path program 10 times [2020-12-23 06:51:30,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:30,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057910496] [2020-12-23 06:51:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-23 06:51:30,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057910496] [2020-12-23 06:51:30,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630834077] [2020-12-23 06:51:30,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:30,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:30,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:30,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:51:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:30,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:51:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-23 06:51:30,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:30,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-23 06:51:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756949384] [2020-12-23 06:51:30,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:51:30,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:51:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:30,868 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 9 states. [2020-12-23 06:51:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:30,932 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-12-23 06:51:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:51:30,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 06:51:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:30,934 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:51:30,934 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:51:30,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:51:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-12-23 06:51:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:51:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-12-23 06:51:30,947 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 58 [2020-12-23 06:51:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:30,948 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-12-23 06:51:30,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:51:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-12-23 06:51:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 06:51:30,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:30,949 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:31,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:31,163 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 11 times [2020-12-23 06:51:31,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:31,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701494148] [2020-12-23 06:51:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-23 06:51:31,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701494148] [2020-12-23 06:51:31,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967533922] [2020-12-23 06:51:31,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:32,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-23 06:51:32,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:51:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 89 proven. 1281 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 06:51:33,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:33,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25] total 26 [2020-12-23 06:51:33,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525013329] [2020-12-23 06:51:33,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:51:33,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:51:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:51:33,804 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 26 states. [2020-12-23 06:51:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:34,271 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-12-23 06:51:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:51:34,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-12-23 06:51:34,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:34,273 INFO L225 Difference]: With dead ends: 101 [2020-12-23 06:51:34,273 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 06:51:34,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:51:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 06:51:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2020-12-23 06:51:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:51:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-12-23 06:51:34,286 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 71 [2020-12-23 06:51:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:34,287 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-12-23 06:51:34,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:51:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-12-23 06:51:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:51:34,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:34,288 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:34,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:51:34,493 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2025848776, now seen corresponding path program 12 times [2020-12-23 06:51:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:34,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368190034] [2020-12-23 06:51:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 06:51:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368190034] [2020-12-23 06:51:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401652893] [2020-12-23 06:51:34,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:35,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-23 06:51:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:51:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:35,742 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:51:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 06:51:35,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:35,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2020-12-23 06:51:35,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959671220] [2020-12-23 06:51:35,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:35,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:35,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:35,785 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 11 states. [2020-12-23 06:51:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:35,913 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-12-23 06:51:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:51:35,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-23 06:51:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:35,916 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:51:35,916 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:51:35,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:51:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-12-23 06:51:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 06:51:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-12-23 06:51:35,936 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 84 [2020-12-23 06:51:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:35,938 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-12-23 06:51:35,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-12-23 06:51:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:51:35,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:35,946 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:36,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:51:36,152 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:36,152 INFO L82 PathProgramCache]: Analyzing trace with hash -771025117, now seen corresponding path program 13 times [2020-12-23 06:51:36,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225140722] [2020-12-23 06:51:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-23 06:51:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225140722] [2020-12-23 06:51:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51794984] [2020-12-23 06:51:36,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:51:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-23 06:51:36,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:36,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:51:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390763090] [2020-12-23 06:51:36,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:36,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:36,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:36,717 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 11 states. [2020-12-23 06:51:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:36,844 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-12-23 06:51:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:36,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-12-23 06:51:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:36,846 INFO L225 Difference]: With dead ends: 127 [2020-12-23 06:51:36,846 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 06:51:36,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 06:51:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2020-12-23 06:51:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 06:51:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2020-12-23 06:51:36,860 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 97 [2020-12-23 06:51:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:36,861 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2020-12-23 06:51:36,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2020-12-23 06:51:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 06:51:36,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:36,862 INFO L422 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:37,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:51:37,078 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:37,079 INFO L82 PathProgramCache]: Analyzing trace with hash 252433944, now seen corresponding path program 14 times [2020-12-23 06:51:37,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:37,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016931376] [2020-12-23 06:51:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-23 06:51:37,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016931376] [2020-12-23 06:51:37,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461012243] [2020-12-23 06:51:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:37,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:37,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:51:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-23 06:51:37,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:37,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:51:37,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545792294] [2020-12-23 06:51:37,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:51:37,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:37,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:51:37,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:51:37,648 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand 12 states. [2020-12-23 06:51:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:37,800 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-12-23 06:51:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:51:37,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-12-23 06:51:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:37,803 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:51:37,803 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 06:51:37,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:51:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 06:51:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2020-12-23 06:51:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 06:51:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-12-23 06:51:37,822 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-12-23 06:51:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:37,822 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-12-23 06:51:37,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:51:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-12-23 06:51:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 06:51:37,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:37,824 INFO L422 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:38,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:38,038 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1225667261, now seen corresponding path program 15 times [2020-12-23 06:51:38,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:38,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742772715] [2020-12-23 06:51:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 06:51:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742772715] [2020-12-23 06:51:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841306406] [2020-12-23 06:51:38,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:40,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:51:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:51:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 06:51:40,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:40,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:51:40,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438225341] [2020-12-23 06:51:40,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:51:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:51:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:40,336 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 13 states. [2020-12-23 06:51:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:40,506 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2020-12-23 06:51:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:51:40,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-12-23 06:51:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:40,508 INFO L225 Difference]: With dead ends: 153 [2020-12-23 06:51:40,508 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 06:51:40,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 06:51:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2020-12-23 06:51:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:51:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2020-12-23 06:51:40,525 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 123 [2020-12-23 06:51:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:40,526 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2020-12-23 06:51:40,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:51:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2020-12-23 06:51:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:51:40,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:40,527 INFO L422 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:40,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:51:40,736 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1191832584, now seen corresponding path program 16 times [2020-12-23 06:51:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:40,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87786227] [2020-12-23 06:51:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-12-23 06:51:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87786227] [2020-12-23 06:51:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473106741] [2020-12-23 06:51:41,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:41,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:41,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:41,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:51:41,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:41,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:51:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-12-23 06:51:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 15 [2020-12-23 06:51:41,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989051981] [2020-12-23 06:51:41,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:51:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:51:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:51:41,375 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand 15 states. [2020-12-23 06:51:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:41,614 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-12-23 06:51:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:51:41,615 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 136 [2020-12-23 06:51:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:41,617 INFO L225 Difference]: With dead ends: 166 [2020-12-23 06:51:41,617 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 06:51:41,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:51:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 06:51:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2020-12-23 06:51:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 06:51:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2020-12-23 06:51:41,638 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 136 [2020-12-23 06:51:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:41,638 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2020-12-23 06:51:41,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:51:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2020-12-23 06:51:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 06:51:41,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:41,641 INFO L422 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:41,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:51:41,854 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1952652131, now seen corresponding path program 17 times [2020-12-23 06:51:41,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:41,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274139067] [2020-12-23 06:51:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-23 06:51:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274139067] [2020-12-23 06:51:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971712319] [2020-12-23 06:51:42,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:48,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-23 06:51:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:48,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 183 conjunts are in the unsatisfiable core [2020-12-23 06:51:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 10 proven. 7050 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-12-23 06:51:51,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:51,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 67] total 68 [2020-12-23 06:51:51,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070045892] [2020-12-23 06:51:51,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:51:51,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:51,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:51:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=4305, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:51:51,214 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand 68 states. [2020-12-23 06:51:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:53,873 INFO L93 Difference]: Finished difference Result 260 states and 281 transitions. [2020-12-23 06:51:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:51:53,874 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 149 [2020-12-23 06:51:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:53,875 INFO L225 Difference]: With dead ends: 260 [2020-12-23 06:51:53,876 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 06:51:53,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=251, Invalid=4305, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:51:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 06:51:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2020-12-23 06:51:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 06:51:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2020-12-23 06:51:53,897 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 149 [2020-12-23 06:51:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:53,898 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2020-12-23 06:51:53,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:51:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2020-12-23 06:51:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 06:51:53,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:53,900 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:54,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:54,111 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash -364070440, now seen corresponding path program 18 times [2020-12-23 06:51:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:54,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113332116] [2020-12-23 06:51:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-12-23 06:51:54,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113332116] [2020-12-23 06:51:54,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121038749] [2020-12-23 06:51:54,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:01,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:52:01,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-23 06:52:01,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 59 proven. 8274 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-12-23 06:52:03,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:03,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 47] total 48 [2020-12-23 06:52:03,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691040020] [2020-12-23 06:52:03,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:52:03,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:52:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2075, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:52:03,165 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 48 states. [2020-12-23 06:52:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:04,662 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-12-23 06:52:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:52:04,666 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 162 [2020-12-23 06:52:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:04,668 INFO L225 Difference]: With dead ends: 192 [2020-12-23 06:52:04,668 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 06:52:04,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=181, Invalid=2075, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:52:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 06:52:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2020-12-23 06:52:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 06:52:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 186 transitions. [2020-12-23 06:52:04,689 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 186 transitions. Word has length 162 [2020-12-23 06:52:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:04,689 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 186 transitions. [2020-12-23 06:52:04,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:52:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 186 transitions. [2020-12-23 06:52:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-23 06:52:04,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:04,692 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:04,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:04,893 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:04,893 INFO L82 PathProgramCache]: Analyzing trace with hash 869335427, now seen corresponding path program 19 times [2020-12-23 06:52:04,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:04,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545505222] [2020-12-23 06:52:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 06:52:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545505222] [2020-12-23 06:52:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413089982] [2020-12-23 06:52:05,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:05,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:52:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 06:52:05,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:05,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:52:05,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101104841] [2020-12-23 06:52:05,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:52:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:52:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:52:05,925 INFO L87 Difference]: Start difference. First operand 176 states and 186 transitions. Second operand 17 states. [2020-12-23 06:52:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:06,237 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2020-12-23 06:52:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:52:06,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 175 [2020-12-23 06:52:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:06,239 INFO L225 Difference]: With dead ends: 205 [2020-12-23 06:52:06,240 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 06:52:06,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:52:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 06:52:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2020-12-23 06:52:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 06:52:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 200 transitions. [2020-12-23 06:52:06,265 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 200 transitions. Word has length 175 [2020-12-23 06:52:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:06,265 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 200 transitions. [2020-12-23 06:52:06,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:52:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 200 transitions. [2020-12-23 06:52:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 06:52:06,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:06,267 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:06,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:06,482 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash -488781896, now seen corresponding path program 20 times [2020-12-23 06:52:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:06,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284437856] [2020-12-23 06:52:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-23 06:52:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284437856] [2020-12-23 06:52:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662414808] [2020-12-23 06:52:06,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:07,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:07,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:52:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-23 06:52:07,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:07,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:52:07,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775129365] [2020-12-23 06:52:07,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:52:07,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:52:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:52:07,429 INFO L87 Difference]: Start difference. First operand 189 states and 200 transitions. Second operand 18 states. [2020-12-23 06:52:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:07,791 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2020-12-23 06:52:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:52:07,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 188 [2020-12-23 06:52:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:07,797 INFO L225 Difference]: With dead ends: 218 [2020-12-23 06:52:07,797 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 06:52:07,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:52:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 06:52:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2020-12-23 06:52:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 06:52:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 214 transitions. [2020-12-23 06:52:07,827 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 214 transitions. Word has length 188 [2020-12-23 06:52:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:07,827 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 214 transitions. [2020-12-23 06:52:07,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:52:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 214 transitions. [2020-12-23 06:52:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 06:52:07,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:07,829 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:08,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:52:08,044 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1412267939, now seen corresponding path program 21 times [2020-12-23 06:52:08,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:08,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124556671] [2020-12-23 06:52:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-12-23 06:52:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124556671] [2020-12-23 06:52:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462008062] [2020-12-23 06:52:08,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:15,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2020-12-23 06:52:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:15,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 259 conjunts are in the unsatisfiable core [2020-12-23 06:52:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 154 proven. 13228 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2020-12-23 06:52:21,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:21,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 90] total 91 [2020-12-23 06:52:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545633547] [2020-12-23 06:52:21,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-23 06:52:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-23 06:52:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=7795, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 06:52:21,519 INFO L87 Difference]: Start difference. First operand 202 states and 214 transitions. Second operand 91 states. [2020-12-23 06:52:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:26,180 INFO L93 Difference]: Finished difference Result 416 states and 443 transitions. [2020-12-23 06:52:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 06:52:26,180 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 201 [2020-12-23 06:52:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:26,182 INFO L225 Difference]: With dead ends: 416 [2020-12-23 06:52:26,182 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 06:52:26,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=405, Invalid=7967, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:52:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 06:52:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 215. [2020-12-23 06:52:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-23 06:52:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 225 transitions. [2020-12-23 06:52:26,217 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 225 transitions. Word has length 201 [2020-12-23 06:52:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:26,217 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 225 transitions. [2020-12-23 06:52:26,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-23 06:52:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 225 transitions. [2020-12-23 06:52:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-23 06:52:26,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:26,219 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:26,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:52:26,424 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1661518440, now seen corresponding path program 22 times [2020-12-23 06:52:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:26,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035983358] [2020-12-23 06:52:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-12-23 06:52:27,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035983358] [2020-12-23 06:52:27,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873397819] [2020-12-23 06:52:27,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:27,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:27,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:52:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:27,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-12-23 06:52:27,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:27,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 21 [2020-12-23 06:52:27,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29242797] [2020-12-23 06:52:27,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:52:27,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:52:27,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:52:27,468 INFO L87 Difference]: Start difference. First operand 215 states and 225 transitions. Second operand 21 states. [2020-12-23 06:52:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:27,997 INFO L93 Difference]: Finished difference Result 244 states and 256 transitions. [2020-12-23 06:52:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:52:27,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 214 [2020-12-23 06:52:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:27,999 INFO L225 Difference]: With dead ends: 244 [2020-12-23 06:52:27,999 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 06:52:28,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:52:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 06:52:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 228. [2020-12-23 06:52:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-23 06:52:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 239 transitions. [2020-12-23 06:52:28,029 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 239 transitions. Word has length 214 [2020-12-23 06:52:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:28,029 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 239 transitions. [2020-12-23 06:52:28,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:52:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 239 transitions. [2020-12-23 06:52:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-23 06:52:28,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:28,031 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:28,245 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1981114941, now seen corresponding path program 23 times [2020-12-23 06:52:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:28,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456943176] [2020-12-23 06:52:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-12-23 06:52:28,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456943176] [2020-12-23 06:52:28,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057718771] [2020-12-23 06:52:28,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:52,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 06:52:52,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 180 conjunts are in the unsatisfiable core [2020-12-23 06:52:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 133 proven. 16870 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-12-23 06:52:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 62] total 63 [2020-12-23 06:52:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735288563] [2020-12-23 06:52:57,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:52:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:52:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:52:57,117 INFO L87 Difference]: Start difference. First operand 228 states and 239 transitions. Second operand 63 states. [2020-12-23 06:52:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:59,453 INFO L93 Difference]: Finished difference Result 257 states and 270 transitions. [2020-12-23 06:52:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:52:59,454 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 227 [2020-12-23 06:52:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:59,455 INFO L225 Difference]: With dead ends: 257 [2020-12-23 06:52:59,455 INFO L226 Difference]: Without dead ends: 253 [2020-12-23 06:52:59,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 176 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:52:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-23 06:52:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 241. [2020-12-23 06:52:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 06:52:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 253 transitions. [2020-12-23 06:52:59,487 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 253 transitions. Word has length 227 [2020-12-23 06:52:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:59,488 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 253 transitions. [2020-12-23 06:52:59,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:52:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 253 transitions. [2020-12-23 06:52:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-23 06:52:59,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:59,489 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:59,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:52:59,690 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1385751688, now seen corresponding path program 24 times [2020-12-23 06:52:59,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:59,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705711434] [2020-12-23 06:52:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-12-23 06:53:00,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705711434] [2020-12-23 06:53:00,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337386591] [2020-12-23 06:53:00,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:20,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2020-12-23 06:53:20,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 06:53:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 133 proven. 18851 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-12-23 06:53:23,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:23,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 42] total 43 [2020-12-23 06:53:23,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6638191] [2020-12-23 06:53:23,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:53:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:53:23,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:53:23,282 INFO L87 Difference]: Start difference. First operand 241 states and 253 transitions. Second operand 43 states. [2020-12-23 06:53:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:24,555 INFO L93 Difference]: Finished difference Result 270 states and 284 transitions. [2020-12-23 06:53:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:53:24,556 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 240 [2020-12-23 06:53:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:24,558 INFO L225 Difference]: With dead ends: 270 [2020-12-23 06:53:24,558 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 06:53:24,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:53:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 06:53:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 254. [2020-12-23 06:53:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-23 06:53:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 267 transitions. [2020-12-23 06:53:24,600 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 267 transitions. Word has length 240 [2020-12-23 06:53:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:24,601 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 267 transitions. [2020-12-23 06:53:24,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:53:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 267 transitions. [2020-12-23 06:53:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-23 06:53:24,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:24,602 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:24,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:24,810 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash -17153053, now seen corresponding path program 25 times [2020-12-23 06:53:24,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:24,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592756432] [2020-12-23 06:53:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-12-23 06:53:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592756432] [2020-12-23 06:53:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750237988] [2020-12-23 06:53:25,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:53:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-12-23 06:53:26,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:26,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:53:26,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779796697] [2020-12-23 06:53:26,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:53:26,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:53:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:53:26,368 INFO L87 Difference]: Start difference. First operand 254 states and 267 transitions. Second operand 23 states. [2020-12-23 06:53:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:26,974 INFO L93 Difference]: Finished difference Result 283 states and 298 transitions. [2020-12-23 06:53:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:53:26,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 253 [2020-12-23 06:53:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:26,977 INFO L225 Difference]: With dead ends: 283 [2020-12-23 06:53:26,977 INFO L226 Difference]: Without dead ends: 279 [2020-12-23 06:53:26,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:53:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-23 06:53:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 267. [2020-12-23 06:53:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 06:53:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2020-12-23 06:53:27,022 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 253 [2020-12-23 06:53:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:27,022 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2020-12-23 06:53:27,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:53:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2020-12-23 06:53:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-23 06:53:27,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:27,024 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:27,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:53:27,237 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash 595288408, now seen corresponding path program 26 times [2020-12-23 06:53:27,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:27,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198433406] [2020-12-23 06:53:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-12-23 06:53:28,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198433406] [2020-12-23 06:53:28,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828971723] [2020-12-23 06:53:28,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:28,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:53:28,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:53:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-12-23 06:53:28,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:28,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:53:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778471313] [2020-12-23 06:53:28,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:53:28,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:53:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:53:28,832 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand 24 states. [2020-12-23 06:53:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:29,618 INFO L93 Difference]: Finished difference Result 296 states and 312 transitions. [2020-12-23 06:53:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:53:29,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 266 [2020-12-23 06:53:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:29,622 INFO L225 Difference]: With dead ends: 296 [2020-12-23 06:53:29,622 INFO L226 Difference]: Without dead ends: 292 [2020-12-23 06:53:29,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:53:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-23 06:53:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 280. [2020-12-23 06:53:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-23 06:53:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 295 transitions. [2020-12-23 06:53:29,673 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 295 transitions. Word has length 266 [2020-12-23 06:53:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:29,674 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 295 transitions. [2020-12-23 06:53:29,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:53:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 295 transitions. [2020-12-23 06:53:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-23 06:53:29,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:29,676 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:29,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:53:29,892 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1926138371, now seen corresponding path program 27 times [2020-12-23 06:53:29,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:29,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300140419] [2020-12-23 06:53:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-12-23 06:53:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300140419] [2020-12-23 06:53:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566763599] [2020-12-23 06:53:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:43,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 92 check-sat command(s) [2020-12-23 06:53:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:43,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:53:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-12-23 06:53:44,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:44,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:53:44,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992455642] [2020-12-23 06:53:44,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:53:44,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:53:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:53:44,086 INFO L87 Difference]: Start difference. First operand 280 states and 295 transitions. Second operand 25 states. [2020-12-23 06:53:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:44,870 INFO L93 Difference]: Finished difference Result 309 states and 326 transitions. [2020-12-23 06:53:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:53:44,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 279 [2020-12-23 06:53:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:44,873 INFO L225 Difference]: With dead ends: 309 [2020-12-23 06:53:44,873 INFO L226 Difference]: Without dead ends: 305 [2020-12-23 06:53:44,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 267 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:53:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-23 06:53:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 293. [2020-12-23 06:53:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-23 06:53:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 309 transitions. [2020-12-23 06:53:44,928 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 309 transitions. Word has length 279 [2020-12-23 06:53:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:44,928 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 309 transitions. [2020-12-23 06:53:44,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:53:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 309 transitions. [2020-12-23 06:53:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-12-23 06:53:44,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:44,930 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:45,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:53:45,138 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1761742648, now seen corresponding path program 28 times [2020-12-23 06:53:45,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:45,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855956169] [2020-12-23 06:53:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-12-23 06:53:46,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855956169] [2020-12-23 06:53:46,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363930192] [2020-12-23 06:53:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:46,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:53:46,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:46,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:53:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:46,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:53:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-12-23 06:53:46,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:46,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 27 [2020-12-23 06:53:46,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077962609] [2020-12-23 06:53:46,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:53:46,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:53:46,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:53:46,775 INFO L87 Difference]: Start difference. First operand 293 states and 309 transitions. Second operand 27 states. [2020-12-23 06:53:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:47,736 INFO L93 Difference]: Finished difference Result 322 states and 340 transitions. [2020-12-23 06:53:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:53:47,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 292 [2020-12-23 06:53:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:47,738 INFO L225 Difference]: With dead ends: 322 [2020-12-23 06:53:47,738 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 06:53:47,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:53:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 06:53:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 306. [2020-12-23 06:53:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-12-23 06:53:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 323 transitions. [2020-12-23 06:53:47,801 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 323 transitions. Word has length 292 [2020-12-23 06:53:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:47,801 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 323 transitions. [2020-12-23 06:53:47,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:53:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 323 transitions. [2020-12-23 06:53:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-12-23 06:53:47,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:47,803 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:48,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:48,017 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1515808803, now seen corresponding path program 29 times [2020-12-23 06:53:48,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:48,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215375364] [2020-12-23 06:53:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-12-23 06:53:49,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215375364] [2020-12-23 06:53:49,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603656697] [2020-12-23 06:53:49,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:51,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 104 check-sat command(s) [2020-12-23 06:54:51,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 417 conjunts are in the unsatisfiable core [2020-12-23 06:54:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 126 proven. 31651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-12-23 06:55:07,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:07,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 141] total 142 [2020-12-23 06:55:07,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040190683] [2020-12-23 06:55:07,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 142 states [2020-12-23 06:55:07,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:07,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2020-12-23 06:55:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=19418, Unknown=0, NotChecked=0, Total=20022 [2020-12-23 06:55:07,592 INFO L87 Difference]: Start difference. First operand 306 states and 323 transitions. Second operand 142 states. [2020-12-23 06:55:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:15,456 INFO L93 Difference]: Finished difference Result 520 states and 555 transitions. [2020-12-23 06:55:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-12-23 06:55:15,457 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 305 [2020-12-23 06:55:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:15,458 INFO L225 Difference]: With dead ends: 520 [2020-12-23 06:55:15,458 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 06:55:15,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 183 SyntacticMatches, 8 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7120 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=604, Invalid=19418, Unknown=0, NotChecked=0, Total=20022 [2020-12-23 06:55:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 06:55:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 319. [2020-12-23 06:55:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-23 06:55:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 331 transitions. [2020-12-23 06:55:15,518 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 331 transitions. Word has length 305 [2020-12-23 06:55:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:15,518 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 331 transitions. [2020-12-23 06:55:15,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 142 states. [2020-12-23 06:55:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 331 transitions. [2020-12-23 06:55:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-12-23 06:55:15,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:15,520 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:15,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 06:55:15,739 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash 575218968, now seen corresponding path program 30 times [2020-12-23 06:55:15,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:15,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125031553] [2020-12-23 06:55:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-12-23 06:55:16,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125031553] [2020-12-23 06:55:16,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085512075] [2020-12-23 06:55:16,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true