/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_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:51:15,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:51:15,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:51:15,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:51:15,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:51:15,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:51:15,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:51:15,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:51:15,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:51:15,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:51:15,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:51:15,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:51:15,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:51:15,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:51:15,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:51:15,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:51:15,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:51:15,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:51:15,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:51:15,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:51:15,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:51:15,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:51:15,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:51:15,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:51:15,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:51:15,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:51:15,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:51:15,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:51:15,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:51:15,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:51:15,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:51:15,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:51:15,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:51:15,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:51:15,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:51:15,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:51:15,106 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 06:51:15,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:51:15,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:51:15,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:51:15,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:51:15,149 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:51:15,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:51:15,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:51:15,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:51:15,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:51:15,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:51:15,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:51:15,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:51:15,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:51:15,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:51:15,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:51:15,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:51:15,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:51:15,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:51:15,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:51:15,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:51:15,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:51:15,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:51:15,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:51:15,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:51:15,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:51:15,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:51:15,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:51:15,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:51:15,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:51:15,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:51:15,602 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:51:15,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2020-12-23 06:51:15,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/516dff909/aa3ab148ec73441eb2b941a50c63a685/FLAGf097f8dc1 [2020-12-23 06:51:16,315 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:51:16,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2020-12-23 06:51:16,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/516dff909/aa3ab148ec73441eb2b941a50c63a685/FLAGf097f8dc1 [2020-12-23 06:51:16,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/516dff909/aa3ab148ec73441eb2b941a50c63a685 [2020-12-23 06:51:16,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:51:16,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:51:16,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:16,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:51:16,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:51:16,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:16" (1/1) ... [2020-12-23 06:51:16,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e28e301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:16, skipping insertion in model container [2020-12-23 06:51:16,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:16" (1/1) ... [2020-12-23 06:51:16,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:51:16,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:51:16,999 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_1-1.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 06:51:17,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:17,036 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:51:17,054 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_1-1.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 06:51:17,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:17,087 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:51:17,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17 WrapperNode [2020-12-23 06:51:17,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:17,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:17,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:51:17,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:51:17,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:17,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:51:17,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:51:17,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:51:17,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (1/1) ... [2020-12-23 06:51:17,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:51:17,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:51:17,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:51:17,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:51:17,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (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 06:51:17,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:51:17,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:51:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:51:17,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:51:17,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:51:17,562 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:51:17,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:17 BoogieIcfgContainer [2020-12-23 06:51:17,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:51:17,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:51:17,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:51:17,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:51:17,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:51:16" (1/3) ... [2020-12-23 06:51:17,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2ee651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:17, skipping insertion in model container [2020-12-23 06:51:17,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:17" (2/3) ... [2020-12-23 06:51:17,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2ee651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:17, skipping insertion in model container [2020-12-23 06:51:17,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:17" (3/3) ... [2020-12-23 06:51:17,574 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-12-23 06:51:17,582 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:51:17,588 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:51:17,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:51:17,646 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:51:17,646 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:51:17,646 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:51:17,647 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:51:17,647 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:51:17,647 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:51:17,647 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:51:17,647 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:51:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:51:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:51:17,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:17,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:51:17,671 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2020-12-23 06:51:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:17,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443968159] [2020-12-23 06:51:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:17,966 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 06:51:17,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443968159] [2020-12-23 06:51:17,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:17,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186889819] [2020-12-23 06:51:17,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:17,995 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 06:51:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:18,038 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2020-12-23 06:51:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:18,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:51:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:18,053 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:51:18,054 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:51:18,057 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 06:51:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:51:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-23 06:51:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:51:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:51:18,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 06:51:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:18,097 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:51:18,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:51:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:51:18,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:18,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:18,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:51:18,099 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:18,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:18,100 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2020-12-23 06:51:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:18,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617404581] [2020-12-23 06:51:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:18,155 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 06:51:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617404581] [2020-12-23 06:51:18,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:18,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:18,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139118999] [2020-12-23 06:51:18,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:18,160 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-23 06:51:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:18,186 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-23 06:51:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:18,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 06:51:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:18,188 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:18,188 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:51:18,190 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 06:51:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:51:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 06:51:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:51:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-23 06:51:18,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-23 06:51:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:18,194 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-23 06:51:18,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-23 06:51:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:51:18,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:18,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:18,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:51:18,196 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2020-12-23 06:51:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:18,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885112966] [2020-12-23 06:51:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:18,332 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 06:51:18,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885112966] [2020-12-23 06:51:18,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853366310] [2020-12-23 06:51:18,334 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 06:51:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:51:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:18,505 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 06:51:18,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:18,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 06:51:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382600394] [2020-12-23 06:51:18,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:18,509 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-12-23 06:51:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:18,635 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-12-23 06:51:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:18,636 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-23 06:51:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:18,637 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:51:18,637 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:51:18,638 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 06:51:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:51:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-23 06:51:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:51:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 06:51:18,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 06:51:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:18,645 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 06:51:18,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 06:51:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:51:18,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:18,646 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:18,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:51:18,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 2 times [2020-12-23 06:51:18,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:18,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284312949] [2020-12-23 06:51:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:18,982 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 06:51:18,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284312949] [2020-12-23 06:51:18,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049028517] [2020-12-23 06:51:18,983 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 06:51:19,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:19,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:51:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:19,137 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 06:51:19,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:19,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 06:51:19,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509434541] [2020-12-23 06:51:19,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:51:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:51:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:51:19,141 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-23 06:51:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:19,518 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-12-23 06:51:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:51:19,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 06:51:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:19,523 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:51:19,523 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:51:19,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:51:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-12-23 06:51:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:51:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 06:51:19,541 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-23 06:51:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:19,542 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 06:51:19,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:51:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 06:51:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:51:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:19,546 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:19,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:19,760 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:19,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1517479077, now seen corresponding path program 3 times [2020-12-23 06:51:19,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:19,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110135027] [2020-12-23 06:51:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:19,910 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 06:51:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110135027] [2020-12-23 06:51:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775543048] [2020-12-23 06:51:19,911 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 06:51:20,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:51:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:51:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:20,168 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 06:51:20,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:20,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:51:20,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982170163] [2020-12-23 06:51:20,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:20,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:20,171 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-12-23 06:51:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:20,222 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-23 06:51:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:51:20,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 06:51:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:20,224 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:51:20,224 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:51:20,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:51:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 06:51:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:51:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 06:51:20,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-12-23 06:51:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:20,234 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 06:51:20,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 06:51:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:51:20,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:20,235 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:20,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:20,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash 640077219, now seen corresponding path program 4 times [2020-12-23 06:51:20,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:20,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057457125] [2020-12-23 06:51:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:20,603 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 06:51:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057457125] [2020-12-23 06:51:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188822615] [2020-12-23 06:51:20,604 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 06:51:20,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:20,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:20,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:51:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 06:51:20,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:20,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 06:51:20,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763359556] [2020-12-23 06:51:20,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:51:20,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:51:20,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:51:20,748 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 12 states. [2020-12-23 06:51:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:21,315 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-12-23 06:51:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:51:21,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-23 06:51:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:21,320 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:51:21,320 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:51:21,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:51:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:51:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-12-23 06:51:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:51:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-23 06:51:21,331 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2020-12-23 06:51:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:21,331 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-23 06:51:21,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:51:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-23 06:51:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:51:21,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:21,333 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:21,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:21,547 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1035828652, now seen corresponding path program 5 times [2020-12-23 06:51:21,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:21,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496235093] [2020-12-23 06:51:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-12-23 06:51:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496235093] [2020-12-23 06:51:21,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202646379] [2020-12-23 06:51:21,764 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 06:51:21,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:51:21,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:51:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-12-23 06:51:21,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:21,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:51:21,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024749636] [2020-12-23 06:51:21,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:51:21,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:21,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:51:21,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:21,911 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2020-12-23 06:51:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:21,958 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-12-23 06:51:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:51:21,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-12-23 06:51:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:21,960 INFO L225 Difference]: With dead ends: 73 [2020-12-23 06:51:21,960 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:51:21,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:51:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 06:51:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:51:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 06:51:21,970 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 38 [2020-12-23 06:51:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:21,970 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 06:51:21,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:51:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 06:51:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:51:21,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:21,971 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:22,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:51:22,186 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:22,187 INFO L82 PathProgramCache]: Analyzing trace with hash -294987944, now seen corresponding path program 6 times [2020-12-23 06:51:22,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:22,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764661018] [2020-12-23 06:51:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 06:51:22,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764661018] [2020-12-23 06:51:22,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272123466] [2020-12-23 06:51:22,351 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 06:51:22,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 06:51:22,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:51:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-23 06:51:22,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:22,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:51:22,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243149025] [2020-12-23 06:51:22,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:51:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:51:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:22,730 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2020-12-23 06:51:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:22,787 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-12-23 06:51:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:51:22,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-12-23 06:51:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:22,792 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:51:22,792 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 06:51:22,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 06:51:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 06:51:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:51:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 06:51:22,805 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2020-12-23 06:51:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:22,806 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 06:51:22,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:51:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 06:51:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:51:22,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:22,807 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:23,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:23,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1517248044, now seen corresponding path program 7 times [2020-12-23 06:51:23,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:23,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849434123] [2020-12-23 06:51:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-23 06:51:23,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849434123] [2020-12-23 06:51:23,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021012353] [2020-12-23 06:51:23,241 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 06:51:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:51:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-23 06:51:23,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:23,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:51:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462240110] [2020-12-23 06:51:23,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:23,420 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-12-23 06:51:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:23,500 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-12-23 06:51:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:23,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-23 06:51:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:23,502 INFO L225 Difference]: With dead ends: 87 [2020-12-23 06:51:23,502 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 06:51:23,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 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 06:51:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 06:51:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 06:51:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:51:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 06:51:23,511 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2020-12-23 06:51:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:23,512 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 06:51:23,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 06:51:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:51:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:23,513 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:23,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:23,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:23,720 INFO L82 PathProgramCache]: Analyzing trace with hash -750680872, now seen corresponding path program 8 times [2020-12-23 06:51:23,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:23,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125655673] [2020-12-23 06:51:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 247 proven. 36 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-23 06:51:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125655673] [2020-12-23 06:51:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090663427] [2020-12-23 06:51:23,933 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 06:51:24,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:51:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 06:51:24,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:24,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-12-23 06:51:24,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040872139] [2020-12-23 06:51:24,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:51:24,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:51:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:51:24,188 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 16 states. [2020-12-23 06:51:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:25,426 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-23 06:51:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:51:25,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-12-23 06:51:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:25,428 INFO L225 Difference]: With dead ends: 117 [2020-12-23 06:51:25,429 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:51:25,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=3363, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:51:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:51:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-12-23 06:51:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:51:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-12-23 06:51:25,455 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 50 [2020-12-23 06:51:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:25,457 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-12-23 06:51:25,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:51:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-12-23 06:51:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:51:25,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:25,459 INFO L422 BasicCegarLoop]: trace histogram [45, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:25,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:51:25,673 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash -75863613, now seen corresponding path program 9 times [2020-12-23 06:51:25,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:25,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388732209] [2020-12-23 06:51:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 405 proven. 45 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-12-23 06:51:25,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388732209] [2020-12-23 06:51:25,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702125716] [2020-12-23 06:51:25,871 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 06:51:26,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:51:26,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:26,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:51:26,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 409 proven. 45 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2020-12-23 06:51:26,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:26,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:51:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357298329] [2020-12-23 06:51:26,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:51:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:51:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:26,342 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 13 states. [2020-12-23 06:51:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:26,438 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-12-23 06:51:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:51:26,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-12-23 06:51:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:26,440 INFO L225 Difference]: With dead ends: 126 [2020-12-23 06:51:26,440 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:51:26,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 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 06:51:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:51:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 06:51:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:51:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-12-23 06:51:26,452 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 66 [2020-12-23 06:51:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:26,452 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-12-23 06:51:26,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:51:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-12-23 06:51:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 06:51:26,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:26,454 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:26,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:26,657 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 10 times [2020-12-23 06:51:26,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:26,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683329367] [2020-12-23 06:51:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:26,838 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 06:51:26,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683329367] [2020-12-23 06:51:26,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981129633] [2020-12-23 06:51:26,840 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 06:51:26,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:26,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:51:26,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:27,108 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 06:51:27,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:27,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2020-12-23 06:51:27,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828262061] [2020-12-23 06:51:27,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:51:27,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:51:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:27,111 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 10 states. [2020-12-23 06:51:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:27,203 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-12-23 06:51:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:51:27,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-12-23 06:51:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:27,206 INFO L225 Difference]: With dead ends: 101 [2020-12-23 06:51:27,206 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 06:51:27,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 06:51:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2020-12-23 06:51:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:51:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-12-23 06:51:27,224 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 71 [2020-12-23 06:51:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:27,226 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-12-23 06:51:27,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:51:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-12-23 06:51:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:51:27,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:27,227 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:27,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:27,442 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2025848776, now seen corresponding path program 11 times [2020-12-23 06:51:27,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:27,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103323893] [2020-12-23 06:51:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:27,697 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 06:51:27,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103323893] [2020-12-23 06:51:27,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938062424] [2020-12-23 06:51:27,698 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 06:51:29,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-12-23 06:51:29,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-23 06:51:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 30 proven. 2022 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 06:51:30,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:30,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 41] total 42 [2020-12-23 06:51:30,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365851710] [2020-12-23 06:51:30,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:51:30,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:51:30,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:51:30,792 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 42 states. [2020-12-23 06:51:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:31,402 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2020-12-23 06:51:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:51:31,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 84 [2020-12-23 06:51:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:31,404 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:51:31,404 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:51:31,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:51:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:51:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-12-23 06:51:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 06:51:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-12-23 06:51:31,420 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 84 [2020-12-23 06:51:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:31,420 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-12-23 06:51:31,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:51:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-12-23 06:51:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:51:31,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:31,422 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:31,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:51:31,630 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:31,632 INFO L82 PathProgramCache]: Analyzing trace with hash -771025117, now seen corresponding path program 12 times [2020-12-23 06:51:31,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:31,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724953648] [2020-12-23 06:51:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:31,910 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 06:51:31,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724953648] [2020-12-23 06:51:31,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089358059] [2020-12-23 06:51:31,911 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 06:51:34,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:51:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:51:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:34,560 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:51:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2020-12-23 06:51:34,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:51:34,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2020-12-23 06:51:34,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155444069] [2020-12-23 06:51:34,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:51:34,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:51:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:51:34,735 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 6 states. [2020-12-23 06:51:34,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:34,888 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-12-23 06:51:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:51:34,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-12-23 06:51:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:34,889 INFO L225 Difference]: With dead ends: 98 [2020-12-23 06:51:34,889 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:51:34,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:51:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:51:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:51:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:51:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:51:34,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2020-12-23 06:51:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:34,894 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:51:34,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:51:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:51:34,894 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:51:35,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:51:35,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:51:35,318 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 43 [2020-12-23 06:51:35,441 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:51:35,441 INFO L185 CegarLoopUtils]: At program point L19-2(lines 19 21) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~x~0 0))) (or (and .cse0 (= ULTIMATE.start_main_~y~0 1)) (and .cse0 (< (mod (+ ULTIMATE.start_main_~y~0 4294967294) 4294967296) 10) (< (mod (+ ULTIMATE.start_main_~y~0 4294967295) 4294967296) 10)) (and .cse0 (= ULTIMATE.start_main_~y~0 0)) (and (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455) (< (mod ULTIMATE.start_main_~x~0 4294967296) 268435455)))) [2020-12-23 06:51:35,441 INFO L189 CegarLoopUtils]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2020-12-23 06:51:35,441 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-23 06:51:35,442 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:51:35,442 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:51:35,442 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:51:35,442 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-23 06:51:35,442 INFO L185 CegarLoopUtils]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455)) [2020-12-23 06:51:35,442 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 24) no Hoare annotation was computed. [2020-12-23 06:51:35,443 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-23 06:51:35,443 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 27) the Hoare annotation is: true [2020-12-23 06:51:35,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:51:35 BoogieIcfgContainer [2020-12-23 06:51:35,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:51:35,463 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:51:35,463 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:51:35,463 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:51:35,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:17" (3/4) ... [2020-12-23 06:51:35,467 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:51:35,478 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:51:35,478 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:51:35,478 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:51:35,478 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:51:35,517 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/nested_1-1.c-witness.graphml [2020-12-23 06:51:35,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:51:35,518 INFO L168 Benchmark]: Toolchain (without parser) took 18796.95 ms. Allocated memory was 153.1 MB in the beginning and 276.8 MB in the end (delta: 123.7 MB). Free memory was 127.7 MB in the beginning and 176.5 MB in the end (delta: -48.9 MB). Peak memory consumption was 75.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,519 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 153.1 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:51:35,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.54 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 118.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,520 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.82 ms. Allocated memory is still 153.1 MB. Free memory was 118.2 MB in the beginning and 116.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,521 INFO L168 Benchmark]: Boogie Preprocessor took 53.85 ms. Allocated memory is still 153.1 MB. Free memory was 116.8 MB in the beginning and 115.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,521 INFO L168 Benchmark]: RCFGBuilder took 362.49 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 104.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,522 INFO L168 Benchmark]: TraceAbstraction took 17895.83 ms. Allocated memory was 153.1 MB in the beginning and 276.8 MB in the end (delta: 123.7 MB). Free memory was 104.0 MB in the beginning and 178.6 MB in the end (delta: -74.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,522 INFO L168 Benchmark]: Witness Printer took 54.25 ms. Allocated memory is still 276.8 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:51:35,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 153.1 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 368.54 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 118.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.82 ms. Allocated memory is still 153.1 MB. Free memory was 118.2 MB in the beginning and 116.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.85 ms. Allocated memory is still 153.1 MB. Free memory was 116.8 MB in the beginning and 115.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 362.49 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 104.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17895.83 ms. Allocated memory was 153.1 MB in the beginning and 276.8 MB in the end (delta: 123.7 MB). Free memory was 104.0 MB in the beginning and 178.6 MB in the end (delta: -74.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. * Witness Printer took 54.25 ms. Allocated memory is still 276.8 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((x == 0 && y == 1) || ((x == 0 && (y + 4294967294) % 4294967296 < 10) && (y + 4294967295) % 4294967296 < 10)) || (x == 0 && y == 0)) || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || (x + 4294967295) % 4294967296 < 268435455 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.4s, OverallIterations: 14, TraceHistogramMax: 70, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 67 SDslu, 555 SDs, 0 SdLazy, 2252 SolverSat, 194 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 750 GetRequests, 517 SyntacticMatches, 17 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 53 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 89 NumberOfFragments, 62 HoareAnnotationTreeSize, 3 FomulaSimplifications, 9318 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 76 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1157 NumberOfCodeBlocks, 966 NumberOfCodeBlocksAsserted, 109 NumberOfCheckSat, 1131 ConstructedInterpolants, 0 QuantifiedInterpolants, 286423 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1274 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 10127/19941 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...