/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:46:18,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:46:18,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:46:18,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:46:18,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:46:18,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:46:18,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:46:18,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:46:18,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:46:18,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:46:18,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:46:18,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:46:18,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:46:18,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:46:18,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:46:18,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:46:18,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:46:18,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:46:18,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:46:18,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:46:18,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:46:18,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:46:18,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:46:18,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:46:18,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:46:18,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:46:18,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:46:18,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:46:18,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:46:18,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:46:18,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:46:18,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:46:18,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:46:18,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:46:18,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:46:18,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:46:18,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:46:18,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:46:18,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:46:18,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:46:18,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:46:18,367 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:46:18,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:46:18,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:46:18,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:46:18,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:46:18,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:46:18,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:46:18,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:46:18,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:46:18,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:46:18,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:46:18,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:46:18,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:46:18,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:18,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:46:18,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:46:18,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:46:18,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:46:18,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:46:18,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:46:18,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:46:18,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:46:18,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:46:18,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:46:18,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:46:18,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:46:18,798 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:46:18,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum03-1.i [2020-12-23 06:46:18,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/adc57eeb3/558f7544b84a476487428d12e81e8c9a/FLAGfd5ae4e77 [2020-12-23 06:46:19,512 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:46:19,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum03-1.i [2020-12-23 06:46:19,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/adc57eeb3/558f7544b84a476487428d12e81e8c9a/FLAGfd5ae4e77 [2020-12-23 06:46:19,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/adc57eeb3/558f7544b84a476487428d12e81e8c9a [2020-12-23 06:46:19,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:46:19,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:46:19,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:19,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:46:19,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:46:19,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:19" (1/1) ... [2020-12-23 06:46:19,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0e68e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:19, skipping insertion in model container [2020-12-23 06:46:19,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:19" (1/1) ... [2020-12-23 06:46:19,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:46:19,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:46:20,147 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum03-1.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2020-12-23 06:46:20,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:20,173 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:46:20,186 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum03-1.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2020-12-23 06:46:20,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:20,207 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:46:20,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20 WrapperNode [2020-12-23 06:46:20,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:20,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:20,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:46:20,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:46:20,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:20,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:46:20,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:46:20,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:46:20,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... [2020-12-23 06:46:20,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:46:20,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:46:20,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:46:20,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:46:20,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:20,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:46:20,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:46:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:46:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:46:20,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:46:20,625 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:46:20,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:20 BoogieIcfgContainer [2020-12-23 06:46:20,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:46:20,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:46:20,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:46:20,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:46:20,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:46:19" (1/3) ... [2020-12-23 06:46:20,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5a1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:20, skipping insertion in model container [2020-12-23 06:46:20,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:20" (2/3) ... [2020-12-23 06:46:20,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5a1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:20, skipping insertion in model container [2020-12-23 06:46:20,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:20" (3/3) ... [2020-12-23 06:46:20,648 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2020-12-23 06:46:20,656 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:46:20,661 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:46:20,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:46:20,754 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:46:20,755 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:46:20,755 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:46:20,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:46:20,755 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:46:20,755 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:46:20,756 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:46:20,756 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:46:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-23 06:46:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:46:20,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:20,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:20,782 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1810721996, now seen corresponding path program 1 times [2020-12-23 06:46:20,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:20,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853578039] [2020-12-23 06:46:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853578039] [2020-12-23 06:46:21,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:21,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:46:21,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447411270] [2020-12-23 06:46:21,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:46:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:46:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:46:21,056 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-23 06:46:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:21,133 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2020-12-23 06:46:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:21,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 06:46:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:21,148 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:46:21,148 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:46:21,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:46:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2020-12-23 06:46:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:46:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 06:46:21,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-12-23 06:46:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:21,197 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 06:46:21,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:46:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 06:46:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:46:21,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:21,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:21,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:46:21,199 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1810662414, now seen corresponding path program 1 times [2020-12-23 06:46:21,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:21,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790798572] [2020-12-23 06:46:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:21,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790798572] [2020-12-23 06:46:21,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:21,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:46:21,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317035776] [2020-12-23 06:46:21,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:21,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:21,451 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2020-12-23 06:46:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:21,496 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2020-12-23 06:46:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:21,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:46:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:21,498 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:46:21,498 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:46:21,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:46:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:46:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:46:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:46:21,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-12-23 06:46:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:21,503 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:46:21,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:46:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:46:21,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:21,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:21,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:46:21,505 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:21,506 INFO L82 PathProgramCache]: Analyzing trace with hash -491357631, now seen corresponding path program 1 times [2020-12-23 06:46:21,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:21,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793407278] [2020-12-23 06:46:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793407278] [2020-12-23 06:46:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612360119] [2020-12-23 06:46:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:46:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:21,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:21,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:46:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377206433] [2020-12-23 06:46:21,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:21,753 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-12-23 06:46:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:21,786 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-23 06:46:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:21,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 06:46:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:21,788 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:46:21,788 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:46:21,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:46:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 06:46:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:46:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:46:21,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-23 06:46:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:21,795 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:46:21,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:46:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:46:21,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:21,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 06:46:22,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:46:22,010 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash -491417213, now seen corresponding path program 1 times [2020-12-23 06:46:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:22,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097011688] [2020-12-23 06:46:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:22,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097011688] [2020-12-23 06:46:22,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205766537] [2020-12-23 06:46:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:46:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:22,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:46:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:22,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:22,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2020-12-23 06:46:22,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278660434] [2020-12-23 06:46:22,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:46:22,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:46:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:46:22,548 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 11 states. [2020-12-23 06:46:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:22,824 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-23 06:46:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:46:22,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 06:46:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:22,826 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:46:22,826 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:46:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:46:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:46:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-23 06:46:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:46:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 06:46:22,841 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-12-23 06:46:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:22,841 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 06:46:22,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:46:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 06:46:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:46:22,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:22,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 06:46:23,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:23,058 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1969109706, now seen corresponding path program 2 times [2020-12-23 06:46:23,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:23,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420204234] [2020-12-23 06:46:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420204234] [2020-12-23 06:46:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600796223] [2020-12-23 06:46:23,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:23,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:23,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:46:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:23,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:23,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:46:23,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88610603] [2020-12-23 06:46:23,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:46:23,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:46:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:46:23,414 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-12-23 06:46:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:23,477 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-23 06:46:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:23,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 06:46:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:23,478 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:46:23,479 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:46:23,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:46:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:46:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 06:46:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:46:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 06:46:23,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-12-23 06:46:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:23,491 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 06:46:23,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:46:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 06:46:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:46:23,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:23,492 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 06:46:23,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:23,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:23,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1700040107, now seen corresponding path program 3 times [2020-12-23 06:46:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:23,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875092515] [2020-12-23 06:46:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:23,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875092515] [2020-12-23 06:46:23,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730970434] [2020-12-23 06:46:23,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:24,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:46:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:46:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:24,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:24,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:46:24,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469791600] [2020-12-23 06:46:24,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:46:24,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:46:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:46:24,159 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-12-23 06:46:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:24,256 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-12-23 06:46:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:46:24,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 06:46:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:24,260 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:46:24,260 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:46:24,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:46:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:46:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-23 06:46:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:46:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 06:46:24,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-12-23 06:46:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:24,269 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 06:46:24,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:46:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 06:46:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:46:24,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:24,271 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1] [2020-12-23 06:46:24,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:24,480 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1613491296, now seen corresponding path program 4 times [2020-12-23 06:46:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:24,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840272841] [2020-12-23 06:46:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:24,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840272841] [2020-12-23 06:46:24,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100629989] [2020-12-23 06:46:24,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:24,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:46:24,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:46:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:24,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:24,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:46:24,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975342993] [2020-12-23 06:46:24,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:46:24,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:24,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:46:24,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:24,935 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-12-23 06:46:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:25,033 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-23 06:46:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:46:25,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-23 06:46:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:25,037 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:46:25,037 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:46:25,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:46:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 06:46:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:46:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 06:46:25,056 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-12-23 06:46:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:25,056 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 06:46:25,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:46:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 06:46:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:46:25,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:25,059 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2020-12-23 06:46:25,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:46:25,273 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash -494561515, now seen corresponding path program 5 times [2020-12-23 06:46:25,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:25,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556213704] [2020-12-23 06:46:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556213704] [2020-12-23 06:46:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024902263] [2020-12-23 06:46:25,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:25,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:46:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:46:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:25,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:25,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:46:25,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271675359] [2020-12-23 06:46:25,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:46:25,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:46:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:25,852 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-12-23 06:46:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:25,945 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-12-23 06:46:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:46:25,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-23 06:46:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:25,947 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:46:25,947 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 06:46:25,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 06:46:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 06:46:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:46:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-23 06:46:25,953 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-12-23 06:46:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:25,953 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-23 06:46:25,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:46:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-23 06:46:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:46:25,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:25,955 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1] [2020-12-23 06:46:26,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:26,159 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1590798326, now seen corresponding path program 6 times [2020-12-23 06:46:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:26,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617122845] [2020-12-23 06:46:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:26,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617122845] [2020-12-23 06:46:26,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933156117] [2020-12-23 06:46:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:27,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 06:46:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:46:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:27,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:27,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2020-12-23 06:46:27,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328112685] [2020-12-23 06:46:27,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:46:27,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:46:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:46:27,850 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2020-12-23 06:46:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:28,443 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-12-23 06:46:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:46:28,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-12-23 06:46:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:28,445 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:46:28,445 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:46:28,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:46:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:46:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-23 06:46:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:46:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 06:46:28,452 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-12-23 06:46:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:28,453 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 06:46:28,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:46:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 06:46:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:46:28,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:28,454 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1] [2020-12-23 06:46:28,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:28,667 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:28,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1794348671, now seen corresponding path program 7 times [2020-12-23 06:46:28,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:28,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776968227] [2020-12-23 06:46:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:28,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776968227] [2020-12-23 06:46:28,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115463218] [2020-12-23 06:46:28,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:46:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:29,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:29,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:46:29,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453815222] [2020-12-23 06:46:29,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:46:29,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:46:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:46:29,027 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2020-12-23 06:46:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:29,168 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-23 06:46:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:46:29,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-23 06:46:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:29,170 INFO L225 Difference]: With dead ends: 49 [2020-12-23 06:46:29,170 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:46:29,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:46:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:46:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-23 06:46:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:46:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-23 06:46:29,177 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2020-12-23 06:46:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:29,177 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-23 06:46:29,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:46:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-23 06:46:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:46:29,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:29,179 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1] [2020-12-23 06:46:29,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:46:29,388 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 979014260, now seen corresponding path program 8 times [2020-12-23 06:46:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:29,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724095355] [2020-12-23 06:46:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:29,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724095355] [2020-12-23 06:46:29,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721540179] [2020-12-23 06:46:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:29,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:46:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:29,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:29,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:46:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546194198] [2020-12-23 06:46:29,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:46:29,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:46:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:46:29,732 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-12-23 06:46:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:29,908 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-12-23 06:46:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:46:29,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-23 06:46:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:29,910 INFO L225 Difference]: With dead ends: 53 [2020-12-23 06:46:29,910 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 06:46:29,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:46:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 06:46:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-23 06:46:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:46:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 06:46:29,916 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-12-23 06:46:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:29,916 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 06:46:29,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:46:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 06:46:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:46:29,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:29,918 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1] [2020-12-23 06:46:30,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:30,122 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash -985101335, now seen corresponding path program 9 times [2020-12-23 06:46:30,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:30,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595579245] [2020-12-23 06:46:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:30,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595579245] [2020-12-23 06:46:30,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496120604] [2020-12-23 06:46:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:30,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:46:30,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:46:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:30,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:30,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:46:30,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142169699] [2020-12-23 06:46:30,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:46:30,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:46:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:46:30,991 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2020-12-23 06:46:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:31,194 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-23 06:46:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:46:31,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-12-23 06:46:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:31,196 INFO L225 Difference]: With dead ends: 57 [2020-12-23 06:46:31,196 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 06:46:31,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:46:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 06:46:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-23 06:46:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:46:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-23 06:46:31,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2020-12-23 06:46:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:31,205 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-23 06:46:31,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:46:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-23 06:46:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:46:31,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:31,206 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1] [2020-12-23 06:46:31,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:31,412 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash -855457058, now seen corresponding path program 10 times [2020-12-23 06:46:31,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:31,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054491160] [2020-12-23 06:46:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:46:31,561 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:46:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:46:31,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:46:31,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:46:31,718 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:46:31,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 06:46:31,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:46:31 BoogieIcfgContainer [2020-12-23 06:46:31,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:46:31,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:46:31,812 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:46:31,812 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:46:31,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:20" (3/4) ... [2020-12-23 06:46:31,815 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:46:31,931 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum03-1.i-witness.graphml [2020-12-23 06:46:31,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:46:31,936 INFO L168 Benchmark]: Toolchain (without parser) took 12040.65 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.3 MB in the beginning and 144.2 MB in the end (delta: -18.0 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,937 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:46:31,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,938 INFO L168 Benchmark]: Boogie Preprocessor took 24.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 114.2 MB in the end (delta: 911.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,939 INFO L168 Benchmark]: RCFGBuilder took 351.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 103.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,940 INFO L168 Benchmark]: TraceAbstraction took 11181.98 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 103.0 MB in the beginning and 147.9 MB in the end (delta: -44.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,940 INFO L168 Benchmark]: Witness Printer took 120.01 ms. Allocated memory is still 218.1 MB. Free memory was 147.9 MB in the beginning and 144.2 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:31,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 311.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 114.2 MB in the end (delta: 911.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 103.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11181.98 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 103.0 MB in the beginning and 147.9 MB in the end (delta: -44.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Witness Printer took 120.01 ms. Allocated memory is still 218.1 MB. Free memory was 147.9 MB in the beginning and 144.2 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND FALSE !(x<10) [L28] x++ [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.9s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 165 SDtfs, 86 SDslu, 925 SDs, 0 SdLazy, 1115 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 353 GetRequests, 235 SyntacticMatches, 19 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=12, 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, 12 MinimizatonAttempts, 15 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 569 NumberOfCodeBlocks, 565 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 500 ConstructedInterpolants, 0 QuantifiedInterpolants, 91856 SizeOfPredicates, 19 NumberOfNonLiveVariables, 937 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 180/1328 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 incorrect! Received shutdown request...