/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-dev-4f750a8 [2020-12-22 04:26:11,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:26:11,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:26:11,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:26:11,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:26:11,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:26:11,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:26:11,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:26:11,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:26:11,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:26:11,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:26:11,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:26:11,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:26:11,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:26:11,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:26:11,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:26:11,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:26:11,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:26:11,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:26:11,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:26:11,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:26:11,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:26:11,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:26:11,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:26:11,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:26:11,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:26:11,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:26:11,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:26:11,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:26:11,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:26:11,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:26:11,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:26:11,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:26:11,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:26:11,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:26:11,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:26:11,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:26:11,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:26:11,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:26:11,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:26:11,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:26:11,309 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:26:11,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:26:11,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:26:11,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:26:11,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:26:11,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:26:11,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:26:11,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:26:11,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:26:11,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:26:11,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:26:11,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:26:11,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:26:11,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:11,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:26:11,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:26:11,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:26:11,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:26:11,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:26:11,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:26:11,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:26:11,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:26:11,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:26:11,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:26:11,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:26:11,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:26:11,734 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:26:11,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2020-12-22 04:26:11,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b322255bc/bda1c50a485f47af9c0b945e548bf6ee/FLAG63460e665 [2020-12-22 04:26:12,355 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:26:12,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2020-12-22 04:26:12,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b322255bc/bda1c50a485f47af9c0b945e548bf6ee/FLAG63460e665 [2020-12-22 04:26:12,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b322255bc/bda1c50a485f47af9c0b945e548bf6ee [2020-12-22 04:26:12,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:26:12,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:26:12,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:12,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:26:12,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:26:12,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:12" (1/1) ... [2020-12-22 04:26:12,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73671039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:12, skipping insertion in model container [2020-12-22 04:26:12,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:12" (1/1) ... [2020-12-22 04:26:12,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:26:12,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:26:12,968 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2020-12-22 04:26:12,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:12,990 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:26:13,005 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2020-12-22 04:26:13,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:13,024 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:26:13,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13 WrapperNode [2020-12-22 04:26:13,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:13,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:13,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:26:13,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:26:13,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:13,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:26:13,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:26:13,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:26:13,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... [2020-12-22 04:26:13,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:26:13,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:26:13,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:26:13,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:26:13,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:13,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:26:13,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:26:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:26:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:26:13,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:26:13,654 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:26:13,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:13 BoogieIcfgContainer [2020-12-22 04:26:13,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:26:13,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:26:13,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:26:13,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:26:13,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:26:12" (1/3) ... [2020-12-22 04:26:13,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473e430c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:13, skipping insertion in model container [2020-12-22 04:26:13,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:13" (2/3) ... [2020-12-22 04:26:13,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473e430c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:13, skipping insertion in model container [2020-12-22 04:26:13,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:13" (3/3) ... [2020-12-22 04:26:13,668 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-12-22 04:26:13,676 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:26:13,681 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:26:13,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:26:13,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:26:13,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:26:13,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:26:13,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:26:13,748 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:26:13,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:26:13,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:26:13,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:26:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:26:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:13,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:13,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:13,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2020-12-22 04:26:13,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:13,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124311989] [2020-12-22 04:26:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:14,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124311989] [2020-12-22 04:26:14,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:14,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:14,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076107833] [2020-12-22 04:26:14,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:14,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:14,040 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 04:26:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:14,082 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2020-12-22 04:26:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:14,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:26:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:14,113 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:26:14,114 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:26:14,121 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 [2020-12-22 04:26:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:26:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-22 04:26:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:26:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:26:14,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:26:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:14,172 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:26:14,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:26:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:26:14,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:14,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:14,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:26:14,174 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:14,175 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2020-12-22 04:26:14,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:14,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848059747] [2020-12-22 04:26:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:14,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848059747] [2020-12-22 04:26:14,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:14,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337609146] [2020-12-22 04:26:14,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:14,224 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-22 04:26:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:14,236 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:26:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:14,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 04:26:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:14,238 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:14,238 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:26:14,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:26:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:26:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:26:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-22 04:26:14,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-22 04:26:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:14,243 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-22 04:26:14,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-22 04:26:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:26:14,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:14,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:14,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:26:14,245 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2020-12-22 04:26:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:14,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404740597] [2020-12-22 04:26:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:14,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404740597] [2020-12-22 04:26:14,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607329115] [2020-12-22 04:26:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:14,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:26:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:14,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:14,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 04:26:14,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162328758] [2020-12-22 04:26:14,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:26:14,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:26:14,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:14,475 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-12-22 04:26:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:14,596 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-12-22 04:26:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:14,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-22 04:26:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:14,600 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:26:14,600 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:26:14,603 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 [2020-12-22 04:26:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:26:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-22 04:26:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:26:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 04:26:14,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-22 04:26:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:14,614 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 04:26:14,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:26:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 04:26:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:26:14,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:14,615 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:14,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:26:14,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 2 times [2020-12-22 04:26:14,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26643115] [2020-12-22 04:26:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:26:14,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26643115] [2020-12-22 04:26:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433663160] [2020-12-22 04:26:14,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:15,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:26:15,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:26:15,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:15,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 04:26:15,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556210986] [2020-12-22 04:26:15,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:26:15,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:26:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:26:15,060 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-22 04:26:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:15,267 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-12-22 04:26:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:26:15,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 04:26:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:15,269 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:26:15,269 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:26:15,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:26:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-12-22 04:26:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:26:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-22 04:26:15,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-22 04:26:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:15,279 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-22 04:26:15,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:26:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-22 04:26:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:26:15,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:15,280 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:15,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:15,494 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:15,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1517479077, now seen corresponding path program 3 times [2020-12-22 04:26:15,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:15,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586226070] [2020-12-22 04:26:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 04:26:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586226070] [2020-12-22 04:26:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564766774] [2020-12-22 04:26:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:15,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:26:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:26:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:26:15,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:15,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:26:15,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617172415] [2020-12-22 04:26:15,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:26:15,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:26:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:15,841 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-12-22 04:26:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:15,877 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-22 04:26:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:26:15,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-22 04:26:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:15,882 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:26:15,882 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:26:15,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:26:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:26:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:26:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 04:26:15,897 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-12-22 04:26:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:15,898 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 04:26:15,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:26:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 04:26:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:26:15,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:15,900 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:16,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:16,106 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash 640077219, now seen corresponding path program 4 times [2020-12-22 04:26:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:16,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971428212] [2020-12-22 04:26:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 04:26:16,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971428212] [2020-12-22 04:26:16,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740498194] [2020-12-22 04:26:16,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:16,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:16,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:26:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 04:26:16,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:16,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 04:26:16,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473992040] [2020-12-22 04:26:16,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:26:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:26:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:16,376 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 12 states. [2020-12-22 04:26:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:16,857 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-12-22 04:26:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:26:16,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-22 04:26:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:16,859 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:26:16,859 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:26:16,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:26:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:26:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-12-22 04:26:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:26:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-22 04:26:16,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2020-12-22 04:26:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:16,869 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-22 04:26:16,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:26:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-22 04:26:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:26:16,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:16,870 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:17,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:17,084 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1035828652, now seen corresponding path program 5 times [2020-12-22 04:26:17,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:17,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652180148] [2020-12-22 04:26:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-12-22 04:26:17,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652180148] [2020-12-22 04:26:17,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870425087] [2020-12-22 04:26:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:17,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:26:17,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:26:17,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-12-22 04:26:17,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:17,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:26:17,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134444088] [2020-12-22 04:26:17,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:26:17,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:17,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:26:17,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:17,394 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2020-12-22 04:26:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:17,436 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-12-22 04:26:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:26:17,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-12-22 04:26:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:17,438 INFO L225 Difference]: With dead ends: 73 [2020-12-22 04:26:17,438 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:26:17,438 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 [2020-12-22 04:26:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:26:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 04:26:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:26:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 04:26:17,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 38 [2020-12-22 04:26:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:17,447 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 04:26:17,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:26:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 04:26:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:26:17,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:17,448 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:17,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:26:17,663 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash -294987944, now seen corresponding path program 6 times [2020-12-22 04:26:17,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:17,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399764882] [2020-12-22 04:26:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 04:26:17,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399764882] [2020-12-22 04:26:17,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185134010] [2020-12-22 04:26:17,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:18,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 04:26:18,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:18,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:26:18,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-22 04:26:18,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:18,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:26:18,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524164143] [2020-12-22 04:26:18,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:18,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:18,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:18,267 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2020-12-22 04:26:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:18,324 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-12-22 04:26:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:26:18,325 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-12-22 04:26:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:18,326 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:26:18,326 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:26:18,326 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 [2020-12-22 04:26:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:26:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 04:26:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:26:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-22 04:26:18,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2020-12-22 04:26:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:18,335 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-22 04:26:18,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-22 04:26:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:26:18,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:18,337 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:18,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:18,541 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1517248044, now seen corresponding path program 7 times [2020-12-22 04:26:18,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:18,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576453710] [2020-12-22 04:26:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-22 04:26:18,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576453710] [2020-12-22 04:26:18,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466750788] [2020-12-22 04:26:18,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:26:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-22 04:26:18,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:18,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:26:18,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552803319] [2020-12-22 04:26:18,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:26:18,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:26:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:18,832 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-12-22 04:26:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:18,902 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-12-22 04:26:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:18,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-22 04:26:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:18,904 INFO L225 Difference]: With dead ends: 87 [2020-12-22 04:26:18,904 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:26:18,904 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 [2020-12-22 04:26:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:26:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 04:26:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:26:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-22 04:26:18,913 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2020-12-22 04:26:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:18,913 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-22 04:26:18,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:26:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-22 04:26:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:26:18,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:18,914 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:19,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash -750680872, now seen corresponding path program 8 times [2020-12-22 04:26:19,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:19,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744767413] [2020-12-22 04:26:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 247 proven. 36 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 04:26:19,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744767413] [2020-12-22 04:26:19,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621451962] [2020-12-22 04:26:19,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:19,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 04:26:19,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:19,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-12-22 04:26:19,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002608902] [2020-12-22 04:26:19,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:26:19,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:19,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:26:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:19,584 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 16 states. [2020-12-22 04:26:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:20,669 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-22 04:26:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:26:20,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-12-22 04:26:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:20,672 INFO L225 Difference]: With dead ends: 117 [2020-12-22 04:26:20,673 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:26:20,676 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 [2020-12-22 04:26:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:26:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-12-22 04:26:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:26:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-12-22 04:26:20,697 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 50 [2020-12-22 04:26:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:20,697 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-12-22 04:26:20,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:26:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-12-22 04:26:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:26:20,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:20,700 INFO L422 BasicCegarLoop]: trace histogram [45, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:20,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:26:20,914 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:20,915 INFO L82 PathProgramCache]: Analyzing trace with hash -75863613, now seen corresponding path program 9 times [2020-12-22 04:26:20,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:20,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182165938] [2020-12-22 04:26:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 405 proven. 45 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-12-22 04:26:21,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182165938] [2020-12-22 04:26:21,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179140473] [2020-12-22 04:26:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:21,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:26:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:21,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:26:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 409 proven. 45 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2020-12-22 04:26:21,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:21,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:26:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508084667] [2020-12-22 04:26:21,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:26:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:26:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:21,522 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 13 states. [2020-12-22 04:26:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:21,610 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-12-22 04:26:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:26:21,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-12-22 04:26:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:21,611 INFO L225 Difference]: With dead ends: 126 [2020-12-22 04:26:21,611 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:26:21,612 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 [2020-12-22 04:26:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:26:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:26:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:26:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-12-22 04:26:21,622 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 66 [2020-12-22 04:26:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:21,623 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-12-22 04:26:21,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:26:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-12-22 04:26:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:26:21,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:21,624 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:21,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:21,831 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 10 times [2020-12-22 04:26:21,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:21,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676619187] [2020-12-22 04:26:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-22 04:26:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676619187] [2020-12-22 04:26:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944851889] [2020-12-22 04:26:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:22,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:22,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:22,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:26:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-22 04:26:22,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:22,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2020-12-22 04:26:22,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683850079] [2020-12-22 04:26:22,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:22,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:22,259 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 10 states. [2020-12-22 04:26:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:22,350 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-12-22 04:26:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:26:22,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-12-22 04:26:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:22,351 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:26:22,351 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:26:22,352 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 [2020-12-22 04:26:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:26:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2020-12-22 04:26:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:26:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-12-22 04:26:22,362 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 71 [2020-12-22 04:26:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:22,363 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-12-22 04:26:22,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-12-22 04:26:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:26:22,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:22,364 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:22,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:22,579 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2025848776, now seen corresponding path program 11 times [2020-12-22 04:26:22,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:22,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736102991] [2020-12-22 04:26:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 04:26:22,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736102991] [2020-12-22 04:26:22,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252475130] [2020-12-22 04:26:22,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:24,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-12-22 04:26:24,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:24,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-22 04:26:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 30 proven. 2022 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-22 04:26:25,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:25,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 41] total 42 [2020-12-22 04:26:25,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418260106] [2020-12-22 04:26:25,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:26:25,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:26:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:26:25,745 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 42 states. [2020-12-22 04:26:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:26,320 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2020-12-22 04:26:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:26:26,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 84 [2020-12-22 04:26:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:26,322 INFO L225 Difference]: With dead ends: 156 [2020-12-22 04:26:26,322 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:26:26,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:26:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:26:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-12-22 04:26:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:26:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-12-22 04:26:26,336 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 84 [2020-12-22 04:26:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:26,336 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-12-22 04:26:26,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:26:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-12-22 04:26:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 04:26:26,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:26,338 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:26,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:26:26,548 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:26,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:26,549 INFO L82 PathProgramCache]: Analyzing trace with hash -771025117, now seen corresponding path program 12 times [2020-12-22 04:26:26,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:26,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108064102] [2020-12-22 04:26:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-22 04:26:26,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108064102] [2020-12-22 04:26:26,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400823833] [2020-12-22 04:26:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:29,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:26:29,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:26:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:29,394 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:26:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2020-12-22 04:26:29,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:26:29,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2020-12-22 04:26:29,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258252765] [2020-12-22 04:26:29,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:26:29,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:26:29,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:26:29,545 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 6 states. [2020-12-22 04:26:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:29,692 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-12-22 04:26:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:26:29,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-12-22 04:26:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:29,693 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:26:29,693 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:26:29,694 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 [2020-12-22 04:26:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:26:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:26:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:26:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:26:29,695 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2020-12-22 04:26:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:29,695 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:26:29,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:26:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:26:29,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:26:29,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:26:29,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:26:30,112 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 43 [2020-12-22 04:26:30,231 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:26:30,232 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)))) [2020-12-22 04:26:30,232 INFO L189 CegarLoopUtils]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2020-12-22 04:26:30,232 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-22 04:26:30,232 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:26:30,232 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:26:30,232 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:26:30,233 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-22 04:26:30,233 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)) [2020-12-22 04:26:30,233 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 24) no Hoare annotation was computed. [2020-12-22 04:26:30,233 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-22 04:26:30,233 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 27) the Hoare annotation is: true [2020-12-22 04:26:30,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:26:30 BoogieIcfgContainer [2020-12-22 04:26:30,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:26:30,261 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:26:30,261 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:26:30,261 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:26:30,262 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:13" (3/4) ... [2020-12-22 04:26:30,266 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:26:30,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-22 04:26:30,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:26:30,278 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:26:30,279 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:26:30,327 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/nested_1-1.c-witness.graphml [2020-12-22 04:26:30,327 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:26:30,329 INFO L168 Benchmark]: Toolchain (without parser) took 17566.83 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 109.5 MB in the beginning and 169.2 MB in the end (delta: -59.7 MB). Peak memory consumption was 56.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,330 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 153.1 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 105.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:26:30,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.28 ms. Allocated memory is still 153.1 MB. Free memory was 109.3 MB in the beginning and 99.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,334 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.81 ms. Allocated memory is still 153.1 MB. Free memory was 99.9 MB in the beginning and 136.0 MB in the end (delta: -36.1 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,337 INFO L168 Benchmark]: Boogie Preprocessor took 65.88 ms. Allocated memory is still 153.1 MB. Free memory was 136.0 MB in the beginning and 137.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,338 INFO L168 Benchmark]: RCFGBuilder took 508.53 ms. Allocated memory is still 153.1 MB. Free memory was 137.6 MB in the beginning and 126.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,338 INFO L168 Benchmark]: TraceAbstraction took 16601.74 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 125.8 MB in the beginning and 171.3 MB in the end (delta: -45.5 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,339 INFO L168 Benchmark]: Witness Printer took 66.84 ms. Allocated memory is still 267.4 MB. Free memory was 171.3 MB in the beginning and 169.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:26:30,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 153.1 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 105.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.28 ms. Allocated memory is still 153.1 MB. Free memory was 109.3 MB in the beginning and 99.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.81 ms. Allocated memory is still 153.1 MB. Free memory was 99.9 MB in the beginning and 136.0 MB in the end (delta: -36.1 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.88 ms. Allocated memory is still 153.1 MB. Free memory was 136.0 MB in the beginning and 137.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 508.53 ms. Allocated memory is still 153.1 MB. Free memory was 137.6 MB in the beginning and 126.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16601.74 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 125.8 MB in the beginning and 171.3 MB in the end (delta: -45.5 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. * Witness Printer took 66.84 ms. Allocated memory is still 267.4 MB. Free memory was 171.3 MB in the beginning and 169.2 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: 16.1s, OverallIterations: 14, TraceHistogramMax: 70, AutomataDifference: 3.1s, 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, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 750 GetRequests, 517 SyntacticMatches, 17 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 3.4s 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: 0.1s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 4.2s 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...