/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/count_up_down-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:42:25,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:42:25,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:42:25,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 06:42:25,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:42:25,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:42:25,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:42:25,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:42:25,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:42:25,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:42:25,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:42:25,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:42:25,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:42:25,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:42:25,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:42:25,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:42:25,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:42:25,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:42:25,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:42:25,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:42:25,421 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 06:42:25,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:42:25,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:42:25,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:42:25,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:42:25,475 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:42:25,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:42:25,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:42:25,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:42:25,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:42:25,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:42:25,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:42:25,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:42:25,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:42:25,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:42:25,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:42:25,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:42:25,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:42:25,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:42:25,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:42:25,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:42:25,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:42:25,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:42:25,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:42:25,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:42:25,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:42:25,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:42:25,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:42:25,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:42:25,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:42:25,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:42:25,993 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:42:25,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/count_up_down-1.c [2020-12-23 06:42:26,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62c1f4205/e00650b13ae944a1996ee8d502131782/FLAGc1d0c31f1 [2020-12-23 06:42:26,656 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:42:26,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-1.c [2020-12-23 06:42:26,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62c1f4205/e00650b13ae944a1996ee8d502131782/FLAGc1d0c31f1 [2020-12-23 06:42:27,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62c1f4205/e00650b13ae944a1996ee8d502131782 [2020-12-23 06:42:27,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:42:27,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:42:27,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:42:27,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:42:27,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:42:27,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e04b0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27, skipping insertion in model container [2020-12-23 06:42:27,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:42:27,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:42:27,227 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/loops/count_up_down-1.c[327,340] [2020-12-23 06:42:27,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:42:27,259 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:42:27,274 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/loops/count_up_down-1.c[327,340] [2020-12-23 06:42:27,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:42:27,296 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:42:27,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27 WrapperNode [2020-12-23 06:42:27,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:42:27,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:42:27,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:42:27,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:42:27,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:42:27,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:42:27,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:42:27,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:42:27,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (1/1) ... [2020-12-23 06:42:27,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:42:27,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:42:27,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:42:27,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:42:27,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (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 06:42:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:42:27,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:42:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:42:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:42:27,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:42:27,747 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:42:27,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:27 BoogieIcfgContainer [2020-12-23 06:42:27,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:42:27,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:42:27,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:42:27,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:42:27,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:42:27" (1/3) ... [2020-12-23 06:42:27,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fa2ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:42:27, skipping insertion in model container [2020-12-23 06:42:27,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:42:27" (2/3) ... [2020-12-23 06:42:27,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fa2ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:42:27, skipping insertion in model container [2020-12-23 06:42:27,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:42:27" (3/3) ... [2020-12-23 06:42:27,761 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2020-12-23 06:42:27,770 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:42:27,776 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:42:27,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:42:27,859 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:42:27,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:42:27,862 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:42:27,862 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:42:27,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:42:27,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:42:27,863 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:42:27,863 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:42:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 06:42:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:42:27,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:27,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:42:27,916 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 06:42:27,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:27,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692111494] [2020-12-23 06:42:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:28,444 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 06:42:28,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692111494] [2020-12-23 06:42:28,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:42:28,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:42:28,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018712135] [2020-12-23 06:42:28,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:42:28,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:28,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:42:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:42:28,485 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 5 states. [2020-12-23 06:42:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:28,671 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-23 06:42:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:42:28,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-23 06:42:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:28,685 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:42:28,685 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:42:28,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:42:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:42:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:42:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:42:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:42:28,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:42:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:28,734 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:42:28,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:42:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:42:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:42:28,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:28,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:28,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:42:28,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 06:42:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:28,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263328047] [2020-12-23 06:42:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:29,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263328047] [2020-12-23 06:42:29,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603628695] [2020-12-23 06:42:29,104 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 06:42:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:29,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:42:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:29,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:29,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:29,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 06:42:29,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831424302] [2020-12-23 06:42:29,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:42:29,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:42:29,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:42:29,319 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 9 states. [2020-12-23 06:42:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:29,446 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-23 06:42:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:42:29,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2020-12-23 06:42:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:29,447 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:42:29,447 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:42:29,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:42:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:42:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:42:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:42:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:42:29,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-23 06:42:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:29,453 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:42:29,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:42:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:42:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:42:29,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:29,454 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:29,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:42:29,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:29,671 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2020-12-23 06:42:29,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:29,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61468971] [2020-12-23 06:42:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:30,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61468971] [2020-12-23 06:42:30,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438906790] [2020-12-23 06:42:30,271 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 06:42:30,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:42:30,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:42:30,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:42:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:30,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:30,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:30,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-23 06:42:30,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023824485] [2020-12-23 06:42:30,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:42:30,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:42:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:42:30,498 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 13 states. [2020-12-23 06:42:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:42:30,889 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-23 06:42:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:42:30,890 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2020-12-23 06:42:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:42:30,891 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:42:30,891 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:42:30,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:42:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:42:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:42:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:42:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 06:42:30,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-12-23 06:42:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:42:30,897 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 06:42:30,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:42:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 06:42:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:42:30,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:42:30,898 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:42:31,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:42:31,112 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:42:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:42:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2020-12-23 06:42:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:42:31,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972301075] [2020-12-23 06:42:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:42:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:42:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972301075] [2020-12-23 06:42:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370895606] [2020-12-23 06:42:31,715 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 06:42:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:42:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:42:31,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:42:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:42:32,761 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 755 [2020-12-23 06:42:47,669 WARN L197 SmtUtils]: Spent 11.36 s on a formula simplification. DAG size of input: 755 DAG size of output: 32 [2020-12-23 06:42:47,810 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:47,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:42:48,069 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts [2020-12-23 06:42:48,563 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:49,354 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:50,332 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:50,893 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:51,351 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:51,923 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:52,610 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:53,055 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:53,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts [2020-12-23 06:42:53,908 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:54,470 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:55,226 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:55,729 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:56,079 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:56,546 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:57,307 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:57,646 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:42:58,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 20 disjuncts [2020-12-23 06:42:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:42:58,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:42:58,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-12-23 06:42:58,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655163835] [2020-12-23 06:42:58,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:42:58,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:42:58,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:42:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:42:58,337 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 13 states. [2020-12-23 06:43:05,974 WARN L197 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-23 06:43:11,405 WARN L197 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-23 06:43:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:13,467 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-23 06:43:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:43:13,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-12-23 06:43:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:13,469 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:43:13,469 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:43:13,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=54, Invalid=185, Unknown=1, NotChecked=0, Total=240 [2020-12-23 06:43:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:43:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:43:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:43:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 06:43:13,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-12-23 06:43:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:13,474 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 06:43:13,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:43:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 06:43:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:43:13,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:13,475 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:13,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:13,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 4 times [2020-12-23 06:43:13,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:13,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878598629] [2020-12-23 06:43:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:14,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878598629] [2020-12-23 06:43:14,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087513869] [2020-12-23 06:43:14,730 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 06:43:14,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:43:14,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:14,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:43:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:15,637 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 23 [2020-12-23 06:43:15,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:15,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:15,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:15,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:16,035 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:16,479 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:17,037 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:17,777 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:18,906 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:20,458 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:21,697 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:22,206 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:22,793 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:23,574 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:24,443 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:25,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:25,787 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:43:25,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:43:25,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:43:26,009 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:26,279 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:26,645 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:27,248 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:28,152 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:29,314 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:30,411 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:30,947 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:31,526 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:32,224 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:33,444 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:43:34,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:43:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:34,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:43:34,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-12-23 06:43:34,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120177147] [2020-12-23 06:43:34,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:43:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:43:34,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:43:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:43:34,788 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 20 states. [2020-12-23 06:43:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:43:52,390 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 06:43:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:43:52,397 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 13 [2020-12-23 06:43:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:43:52,398 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:43:52,399 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:43:52,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=81, Invalid=470, Unknown=1, NotChecked=0, Total=552 [2020-12-23 06:43:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:43:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 06:43:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:43:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 06:43:52,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-12-23 06:43:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:43:52,408 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 06:43:52,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:43:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 06:43:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:43:52,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:43:52,409 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:43:52,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:43:52,613 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:43:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:43:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 5 times [2020-12-23 06:43:52,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:43:52,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315938441] [2020-12-23 06:43:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:43:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:43:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:43:53,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315938441] [2020-12-23 06:43:53,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663334889] [2020-12-23 06:43:53,832 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 06:43:54,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:43:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:43:54,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:43:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:43:55,077 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1042 DAG size of output: 855 [2020-12-23 06:44:25,871 WARN L197 SmtUtils]: Spent 24.20 s on a formula simplification. DAG size of input: 855 DAG size of output: 28 [2020-12-23 06:44:25,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:44:25,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:44:26,124 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:44:26,484 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:44:26,721 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 06:44:26,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:44:26,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 06:44:26,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039465600] [2020-12-23 06:44:26,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:44:26,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:44:26,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:44:26,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:44:26,723 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2020-12-23 06:44:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:44:29,651 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-23 06:44:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:44:29,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-12-23 06:44:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:44:29,654 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:44:29,654 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:44:29,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:44:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:44:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:44:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:44:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:44:29,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-23 06:44:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:44:29,660 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:44:29,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:44:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:44:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:44:29,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:44:29,661 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:44:29,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:44:29,862 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:44:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:44:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 6 times [2020-12-23 06:44:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:44:29,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977061397] [2020-12-23 06:44:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:44:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:44:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:44:34,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977061397] [2020-12-23 06:44:34,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607500619] [2020-12-23 06:44:34,389 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 06:44:34,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 06:44:34,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:44:34,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:44:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates...