/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/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:56,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:56,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:56,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:56,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:56,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:56,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:56,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:56,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:56,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:56,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:56,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:56,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:56,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:56,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:56,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:56,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:56,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:56,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:56,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:56,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:56,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:56,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:56,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:56,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:20:56,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:20:56,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:20:56,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:20:56,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:20:56,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:20:56,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:56,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:56,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:56,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:56,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:56,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:56,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:56,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:56,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:56,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:56,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:56,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:20:56,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:56,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:56,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:56,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:56,939 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:56,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:56,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:56,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:56,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:56,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:56,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:56,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:56,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:56,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:56,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:56,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:56,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:56,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:56,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:56,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:56,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:56,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:56,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:56,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:56,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:56,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:57,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:57,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:57,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:57,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:57,352 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:57,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_10x0-2.c [2021-01-06 19:20:57,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ef8a5d85/e4d182f595eb4a6db35554c6221718c1/FLAG1c7f447e8 [2021-01-06 19:20:58,050 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:58,051 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-2.c [2021-01-06 19:20:58,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ef8a5d85/e4d182f595eb4a6db35554c6221718c1/FLAG1c7f447e8 [2021-01-06 19:20:58,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ef8a5d85/e4d182f595eb4a6db35554c6221718c1 [2021-01-06 19:20:58,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:58,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:58,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:58,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:58,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:58,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf27a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58, skipping insertion in model container [2021-01-06 19:20:58,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:58,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:58,680 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/recursive-simple/sum_10x0-2.c[481,494] [2021-01-06 19:20:58,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:58,695 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:58,711 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/recursive-simple/sum_10x0-2.c[481,494] [2021-01-06 19:20:58,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:58,727 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:58,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58 WrapperNode [2021-01-06 19:20:58,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:58,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:58,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:58,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:58,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:58,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:58,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:58,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:58,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (1/1) ... [2021-01-06 19:20:58,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:58,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:58,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:58,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:58,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (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 [2021-01-06 19:20:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:58,896 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-01-06 19:20:58,897 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-01-06 19:20:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:59,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:59,200 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:59,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:59 BoogieIcfgContainer [2021-01-06 19:20:59,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:59,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:59,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:59,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:59,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:58" (1/3) ... [2021-01-06 19:20:59,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b28140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:59, skipping insertion in model container [2021-01-06 19:20:59,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:58" (2/3) ... [2021-01-06 19:20:59,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b28140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:59, skipping insertion in model container [2021-01-06 19:20:59,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:59" (3/3) ... [2021-01-06 19:20:59,219 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2021-01-06 19:20:59,228 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:59,233 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:59,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:59,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:59,299 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:59,299 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:59,299 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:59,299 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:59,299 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:59,300 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:59,300 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:20:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:59,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:59,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:59,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:20:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:59,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461439601] [2021-01-06 19:20:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:20:59,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461439601] [2021-01-06 19:20:59,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:59,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:59,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390723052] [2021-01-06 19:20:59,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:59,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:59,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:59,638 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:20:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:59,713 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 19:20:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:59,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:59,736 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:59,736 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:20:59,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:20:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:20:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:20:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:20:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:20:59,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:20:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:59,844 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:20:59,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:20:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:20:59,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:59,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:59,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:59,854 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:20:59,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:59,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029948788] [2021-01-06 19:20:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:21:00,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029948788] [2021-01-06 19:21:00,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133181225] [2021-01-06 19:21:00,027 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 [2021-01-06 19:21:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:21:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:21:00,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:00,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 19:21:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83772596] [2021-01-06 19:21:00,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:21:00,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:21:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:21:00,229 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2021-01-06 19:21:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:00,310 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:21:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:21:00,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 19:21:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:00,313 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:21:00,314 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:21:00,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:21:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:21:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:21:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:21:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:21:00,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:21:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:00,335 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:21:00,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:21:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:21:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:21:00,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:00,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:00,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:21:00,554 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:21:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:00,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054774286] [2021-01-06 19:21:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:21:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054774286] [2021-01-06 19:21:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571612385] [2021-01-06 19:21:00,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:00,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:00,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 19:21:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:21:00,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:00,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 19:21:00,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001411630] [2021-01-06 19:21:00,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:21:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:00,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:21:00,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:21:00,958 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2021-01-06 19:21:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:01,031 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:21:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:21:01,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 19:21:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:01,033 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:21:01,033 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:21:01,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:21:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:21:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:21:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:21:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:21:01,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:21:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:01,048 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:21:01,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:21:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:21:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:21:01,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:01,052 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:01,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:01,267 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:21:01,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:01,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446041764] [2021-01-06 19:21:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:21:01,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446041764] [2021-01-06 19:21:01,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975586091] [2021-01-06 19:21:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:01,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:21:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 19:21:01,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:21:01,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:01,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 19:21:01,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105448245] [2021-01-06 19:21:01,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:21:01,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:21:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:21:01,744 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2021-01-06 19:21:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:01,824 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:21:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:21:01,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-01-06 19:21:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:01,826 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:21:01,826 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:21:01,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:21:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:21:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:21:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:21:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:21:01,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:21:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:01,833 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:21:01,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:21:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:21:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:21:01,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:01,835 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:02,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:02,051 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:02,052 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:21:02,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:02,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180427385] [2021-01-06 19:21:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:21:02,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180427385] [2021-01-06 19:21:02,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867354992] [2021-01-06 19:21:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:02,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:21:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:21:02,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:02,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 19:21:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533118748] [2021-01-06 19:21:02,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:21:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:21:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:21:02,469 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2021-01-06 19:21:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:02,550 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:21:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:21:02,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2021-01-06 19:21:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:02,552 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:21:02,552 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:21:02,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:21:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:21:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:21:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:21:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:21:02,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:21:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:02,559 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:21:02,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:21:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:21:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:21:02,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:02,561 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:02,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:02,776 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:21:02,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:02,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958310282] [2021-01-06 19:21:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:21:03,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958310282] [2021-01-06 19:21:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951021785] [2021-01-06 19:21:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:03,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:21:03,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:03,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 19:21:03,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:21:03,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:03,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 19:21:03,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112834417] [2021-01-06 19:21:03,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:21:03,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:21:03,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:21:03,181 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2021-01-06 19:21:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:03,276 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:21:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:21:03,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2021-01-06 19:21:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:03,278 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:21:03,278 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:21:03,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:21:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:21:03,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:21:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:21:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:21:03,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:21:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:03,286 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:21:03,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:21:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:21:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:21:03,288 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:03,288 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:03,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:21:03,502 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:21:03,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:03,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812825927] [2021-01-06 19:21:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:21:03,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812825927] [2021-01-06 19:21:03,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709234824] [2021-01-06 19:21:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:03,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:21:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:21:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:21:03,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:03,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 19:21:03,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991918545] [2021-01-06 19:21:03,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:21:03,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:21:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:21:03,944 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2021-01-06 19:21:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:04,056 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-01-06 19:21:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:21:04,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2021-01-06 19:21:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:04,058 INFO L225 Difference]: With dead ends: 37 [2021-01-06 19:21:04,058 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 19:21:04,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-01-06 19:21:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 19:21:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 19:21:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 19:21:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 19:21:04,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-01-06 19:21:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:04,066 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 19:21:04,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:21:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 19:21:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:21:04,068 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:04,068 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:04,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:04,283 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-01-06 19:21:04,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:04,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85262410] [2021-01-06 19:21:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:21:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85262410] [2021-01-06 19:21:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123400579] [2021-01-06 19:21:04,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 19:21:04,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:21:04,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:04,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 19:21:04,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532073454] [2021-01-06 19:21:04,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 19:21:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 19:21:04,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:21:04,743 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2021-01-06 19:21:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:04,862 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 19:21:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:21:04,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2021-01-06 19:21:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:04,863 INFO L225 Difference]: With dead ends: 40 [2021-01-06 19:21:04,864 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 19:21:04,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:21:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 19:21:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 19:21:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 19:21:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 19:21:04,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-01-06 19:21:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:04,871 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 19:21:04,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 19:21:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 19:21:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 19:21:04,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:04,872 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:05,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:05,087 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-01-06 19:21:05,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:05,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942438490] [2021-01-06 19:21:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:21:05,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942438490] [2021-01-06 19:21:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573157175] [2021-01-06 19:21:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:05,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:21:05,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:21:05,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:05,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 19:21:05,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660975742] [2021-01-06 19:21:05,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:21:05,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:21:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:21:05,625 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2021-01-06 19:21:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:05,791 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-06 19:21:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:21:05,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2021-01-06 19:21:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:05,793 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:21:05,793 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:21:05,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:21:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:21:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:21:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:21:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 19:21:05,802 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-01-06 19:21:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:05,802 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 19:21:05,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:21:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 19:21:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:21:05,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:05,804 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:06,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:21:06,019 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-01-06 19:21:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:06,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895075858] [2021-01-06 19:21:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:21:06,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895075858] [2021-01-06 19:21:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942051143] [2021-01-06 19:21:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:06,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 19:21:06,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 19:21:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:21:06,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:06,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 19:21:06,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260835428] [2021-01-06 19:21:06,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:21:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:21:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:21:06,631 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2021-01-06 19:21:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:06,795 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 19:21:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:21:06,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2021-01-06 19:21:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:06,802 INFO L225 Difference]: With dead ends: 46 [2021-01-06 19:21:06,802 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 19:21:06,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-01-06 19:21:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 19:21:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 19:21:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 19:21:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 19:21:06,821 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-01-06 19:21:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:06,822 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 19:21:06,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:21:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 19:21:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:21:06,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:06,825 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:07,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:07,042 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:07,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-01-06 19:21:07,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:07,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763064934] [2021-01-06 19:21:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:21:07,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:21:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:21:07,092 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:21:07,119 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 19:21:07,119 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 19:21:07,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:21:07,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:21:07 BoogieIcfgContainer [2021-01-06 19:21:07,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:21:07,185 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:21:07,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:21:07,185 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:21:07,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:59" (3/4) ... [2021-01-06 19:21:07,188 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 19:21:07,286 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_10x0-2.c-witness.graphml [2021-01-06 19:21:07,286 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:21:07,288 INFO L168 Benchmark]: Toolchain (without parser) took 8855.39 ms. Allocated memory was 164.6 MB in the beginning and 238.0 MB in the end (delta: 73.4 MB). Free memory was 140.7 MB in the beginning and 152.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 62.6 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,289 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 164.6 MB. Free memory was 140.1 MB in the beginning and 140.0 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:07,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.15 ms. Allocated memory is still 164.6 MB. Free memory was 140.4 MB in the beginning and 131.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.12 ms. Allocated memory is still 164.6 MB. Free memory was 131.2 MB in the beginning and 129.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,294 INFO L168 Benchmark]: Boogie Preprocessor took 22.44 ms. Allocated memory is still 164.6 MB. Free memory was 129.9 MB in the beginning and 129.0 MB in the end (delta: 909.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,295 INFO L168 Benchmark]: RCFGBuilder took 418.92 ms. Allocated memory is still 164.6 MB. Free memory was 129.0 MB in the beginning and 117.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,295 INFO L168 Benchmark]: TraceAbstraction took 7974.68 ms. Allocated memory was 164.6 MB in the beginning and 238.0 MB in the end (delta: 73.4 MB). Free memory was 117.3 MB in the beginning and 156.8 MB in the end (delta: -39.4 MB). Peak memory consumption was 35.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,296 INFO L168 Benchmark]: Witness Printer took 101.13 ms. Allocated memory is still 238.0 MB. Free memory was 156.3 MB in the beginning and 152.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:07,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 164.6 MB. Free memory was 140.1 MB in the beginning and 140.0 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.15 ms. Allocated memory is still 164.6 MB. Free memory was 140.4 MB in the beginning and 131.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.12 ms. Allocated memory is still 164.6 MB. Free memory was 131.2 MB in the beginning and 129.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.44 ms. Allocated memory is still 164.6 MB. Free memory was 129.9 MB in the beginning and 129.0 MB in the end (delta: 909.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 418.92 ms. Allocated memory is still 164.6 MB. Free memory was 129.0 MB in the beginning and 117.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7974.68 ms. Allocated memory was 164.6 MB in the beginning and 238.0 MB in the end (delta: 73.4 MB). Free memory was 117.3 MB in the beginning and 156.8 MB in the end (delta: -39.4 MB). Peak memory consumption was 35.3 MB. Max. memory is 8.0 GB. * Witness Printer took 101.13 ms. Allocated memory is still 238.0 MB. Free memory was 156.3 MB in the beginning and 152.6 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: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 10; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 254 SDslu, 300 SDs, 0 SdLazy, 326 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 800 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 711 ConstructedInterpolants, 0 QuantifiedInterpolants, 79767 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1283 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 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...