/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_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:27:20,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:27:20,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:27:20,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:27:20,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:27:20,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:27:20,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:27:20,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:27:20,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:27:20,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:27:20,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:27:20,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:27:20,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:27:20,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:27:20,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:27:20,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:27:20,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:27:20,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:27:20,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:27:20,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:27:20,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:27:20,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:27:20,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:27:20,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:27:20,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:27:20,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:27:20,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:27:20,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:27:20,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:27:20,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:27:20,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:27:20,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:27:20,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:27:20,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:27:20,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:27:20,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:27:20,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:27:20,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:27:20,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:27:20,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:27:20,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:27:20,667 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:27:20,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:27:20,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:27:20,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:27:20,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:27:20,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:27:20,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:27:20,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:27:20,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:27:20,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:27:20,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:27:20,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:27:20,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:27:20,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:20,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:27:20,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:27:20,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:27:20,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:27:20,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:27:20,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:27:20,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:27:20,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:27:21,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:27:21,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:27:21,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:27:21,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:27:21,081 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:27:21,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-12-23 09:27:21,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66d63a806/8bd6d1b739b440b68d7e5ef924e5ed48/FLAGf1817e3c3 [2020-12-23 09:27:21,804 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:27:21,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-12-23 09:27:21,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66d63a806/8bd6d1b739b440b68d7e5ef924e5ed48/FLAGf1817e3c3 [2020-12-23 09:27:22,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66d63a806/8bd6d1b739b440b68d7e5ef924e5ed48 [2020-12-23 09:27:22,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:27:22,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:27:22,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:22,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:27:22,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:27:22,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b25190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22, skipping insertion in model container [2020-12-23 09:27:22,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:27:22,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:27:22,489 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_15x0-1.c[481,494] [2020-12-23 09:27:22,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:22,516 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:27:22,539 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_15x0-1.c[481,494] [2020-12-23 09:27:22,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:22,559 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:27:22,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22 WrapperNode [2020-12-23 09:27:22,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:22,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:22,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:27:22,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:27:22,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:22,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:27:22,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:27:22,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:27:22,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... [2020-12-23 09:27:22,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:27:22,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:27:22,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:27:22,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:27:22,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:22,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:27:22,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:27:22,766 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-23 09:27:22,766 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-23 09:27:22,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:27:22,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:27:23,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:27:23,013 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:27:23,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:23 BoogieIcfgContainer [2020-12-23 09:27:23,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:27:23,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:27:23,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:27:23,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:27:23,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:27:22" (1/3) ... [2020-12-23 09:27:23,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c92dd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:23, skipping insertion in model container [2020-12-23 09:27:23,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:22" (2/3) ... [2020-12-23 09:27:23,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c92dd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:23, skipping insertion in model container [2020-12-23 09:27:23,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:23" (3/3) ... [2020-12-23 09:27:23,026 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-12-23 09:27:23,034 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:27:23,040 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:27:23,099 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:27:23,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:27:23,131 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:27:23,131 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:27:23,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:27:23,131 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:27:23,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:27:23,132 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:27:23,132 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:27:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:27:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:27:23,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:23,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:23,160 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:27:23,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:23,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752920659] [2020-12-23 09:27:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:27:23,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752920659] [2020-12-23 09:27:23,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:27:23,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:27:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120616597] [2020-12-23 09:27:23,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:27:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:27:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:27:23,561 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:27:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:23,757 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:27:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:27:23,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:27:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:23,772 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:23,772 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:27:23,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:27:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:27:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:27:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:27:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:27:23,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:27:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:23,829 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:27:23,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:27:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:27:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:27:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:23,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:23,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:27:23,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:27:23,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:23,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376568685] [2020-12-23 09:27:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376568685] [2020-12-23 09:27:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182202544] [2020-12-23 09:27:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:27:24,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:24,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:24,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 09:27:24,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000345731] [2020-12-23 09:27:24,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:27:24,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:27:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:27:24,201 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-23 09:27:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:24,252 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:27:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:27:24,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 09:27:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:24,254 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:27:24,254 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:27:24,256 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 [2020-12-23 09:27:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:27:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:27:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:27:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:27:24,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:27:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:24,263 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:27:24,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:27:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:27:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:27:24,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:24,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:24,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:27:24,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:24,482 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:27:24,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:24,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125358157] [2020-12-23 09:27:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:24,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:24,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:27:24,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125358157] [2020-12-23 09:27:24,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452802625] [2020-12-23 09:27:24,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:24,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:27:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:27:24,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:24,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 09:27:24,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159975895] [2020-12-23 09:27:24,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:27:24,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:24,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:27:24,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:27:24,819 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-23 09:27:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:24,904 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:27:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:27:24,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 09:27:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:24,908 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:24,908 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:27:24,910 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 [2020-12-23 09:27:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:27:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:27:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:27:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:27:24,924 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:27:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:24,924 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:27:24,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:27:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:27:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:27:24,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:24,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:25,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:25,142 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:25,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:27:25,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:25,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873742423] [2020-12-23 09:27:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:27:25,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873742423] [2020-12-23 09:27:25,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094029216] [2020-12-23 09:27:25,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:25,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:27:25,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:27:25,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:27:25,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:25,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 09:27:25,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234165540] [2020-12-23 09:27:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:27:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:27:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:27:25,519 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-23 09:27:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:25,603 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 09:27:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:27:25,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 09:27:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:25,605 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:27:25,605 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:27:25,606 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 [2020-12-23 09:27:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:27:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:27:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:27:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 09:27:25,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-23 09:27:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:25,614 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 09:27:25,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:27:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 09:27:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 09:27:25,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:25,615 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:25,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:25,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-23 09:27:25,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:25,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832491579] [2020-12-23 09:27:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:27:26,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832491579] [2020-12-23 09:27:26,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695460667] [2020-12-23 09:27:26,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:26,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:26,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:27:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:27:26,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:26,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 09:27:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124963115] [2020-12-23 09:27:26,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:27:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:27:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:27:26,239 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-23 09:27:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:26,323 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 09:27:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:27:26,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-23 09:27:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:26,326 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:27:26,326 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:27:26,327 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 [2020-12-23 09:27:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:27:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:27:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:27:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 09:27:26,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-23 09:27:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:26,334 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 09:27:26,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:27:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 09:27:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:27:26,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:26,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:26,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:26,551 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-23 09:27:26,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:26,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359574014] [2020-12-23 09:27:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:27:26,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359574014] [2020-12-23 09:27:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281016111] [2020-12-23 09:27:26,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:26,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:27:26,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:27:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:27:27,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:27,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 09:27:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621046708] [2020-12-23 09:27:27,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:27:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:27:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:27:27,069 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-23 09:27:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:27,183 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 09:27:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:27:27,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-23 09:27:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:27,185 INFO L225 Difference]: With dead ends: 34 [2020-12-23 09:27:27,185 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 09:27:27,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:27:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 09:27:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 09:27:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:27:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 09:27:27,193 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-23 09:27:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:27,193 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 09:27:27,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:27:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 09:27:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:27:27,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:27,195 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:27,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:27:27,409 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-23 09:27:27,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:27,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490120093] [2020-12-23 09:27:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:27:27,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490120093] [2020-12-23 09:27:27,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950946451] [2020-12-23 09:27:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:27,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:27:27,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:27,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:27:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:27:27,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:27,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 09:27:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441055586] [2020-12-23 09:27:27,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:27:27,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:27:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:27:27,973 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-23 09:27:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:28,086 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 09:27:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:27:28,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-23 09:27:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:28,088 INFO L225 Difference]: With dead ends: 37 [2020-12-23 09:27:28,088 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 09:27:28,089 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 [2020-12-23 09:27:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 09:27:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 09:27:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:27:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 09:27:28,096 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-23 09:27:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:28,096 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 09:27:28,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:27:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 09:27:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:27:28,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:28,098 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:28,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:28,312 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-23 09:27:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:28,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179063339] [2020-12-23 09:27:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:27:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179063339] [2020-12-23 09:27:28,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367555614] [2020-12-23 09:27:28,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:28,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:27:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:27:28,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:28,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 09:27:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244248842] [2020-12-23 09:27:28,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:27:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:27:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:27:28,835 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-23 09:27:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:28,989 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 09:27:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:27:28,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-23 09:27:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:28,990 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:27:28,991 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 09:27:28,991 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 [2020-12-23 09:27:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 09:27:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 09:27:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:27:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 09:27:28,998 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-23 09:27:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:28,998 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 09:27:28,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:27:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 09:27:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:27:29,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:29,000 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:29,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:29,216 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-23 09:27:29,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:29,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739745098] [2020-12-23 09:27:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:27:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739745098] [2020-12-23 09:27:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922920430] [2020-12-23 09:27:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:29,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:29,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:27:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:27:29,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:29,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 09:27:29,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391788861] [2020-12-23 09:27:29,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:27:29,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:29,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:27:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:27:29,716 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-23 09:27:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:29,859 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 09:27:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:27:29,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-23 09:27:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:29,861 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:27:29,861 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 09:27:29,862 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 [2020-12-23 09:27:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 09:27:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 09:27:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:27:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 09:27:29,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-23 09:27:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:29,870 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 09:27:29,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:27:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 09:27:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:27:29,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:29,871 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:30,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:27:30,085 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:30,086 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-23 09:27:30,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:30,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69905387] [2020-12-23 09:27:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:27:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69905387] [2020-12-23 09:27:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526362584] [2020-12-23 09:27:30,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:30,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:27:30,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:27:30,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:27:30,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:30,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 09:27:30,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942400850] [2020-12-23 09:27:30,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:27:30,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:27:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:27:30,647 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-23 09:27:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:30,797 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 09:27:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:27:30,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-23 09:27:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:30,799 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:27:30,799 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 09:27:30,800 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 [2020-12-23 09:27:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 09:27:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 09:27:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:27:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 09:27:30,807 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-23 09:27:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:30,807 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 09:27:30,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:27:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 09:27:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:27:30,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:30,809 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:31,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:31,025 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-23 09:27:31,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:31,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519803287] [2020-12-23 09:27:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 09:27:31,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519803287] [2020-12-23 09:27:31,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467250937] [2020-12-23 09:27:31,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:31,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:31,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:27:31,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 09:27:31,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:31,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 09:27:31,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466347406] [2020-12-23 09:27:31,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:27:31,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:31,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:27:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:27:31,700 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-12-23 09:27:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:31,945 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-23 09:27:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:27:31,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-23 09:27:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:31,947 INFO L225 Difference]: With dead ends: 49 [2020-12-23 09:27:31,948 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 09:27:31,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-12-23 09:27:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 09:27:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 09:27:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:27:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 09:27:31,955 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-23 09:27:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:31,956 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 09:27:31,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:27:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 09:27:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:27:31,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:31,957 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:32,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:32,172 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-23 09:27:32,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:32,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25122374] [2020-12-23 09:27:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 09:27:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25122374] [2020-12-23 09:27:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036450091] [2020-12-23 09:27:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:32,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:27:32,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:32,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 09:27:32,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 09:27:32,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:32,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 09:27:32,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636012239] [2020-12-23 09:27:32,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:27:32,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:32,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:27:32,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:27:32,901 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-12-23 09:27:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:33,095 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 09:27:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:27:33,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-23 09:27:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:33,097 INFO L225 Difference]: With dead ends: 52 [2020-12-23 09:27:33,097 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 09:27:33,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-23 09:27:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 09:27:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 09:27:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 09:27:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 09:27:33,116 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-23 09:27:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:33,118 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 09:27:33,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:27:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 09:27:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:27:33,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:33,123 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:33,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 09:27:33,337 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-23 09:27:33,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:33,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434092728] [2020-12-23 09:27:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 09:27:33,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434092728] [2020-12-23 09:27:33,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423778312] [2020-12-23 09:27:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:33,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:27:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 09:27:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 09:27:34,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:34,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 09:27:34,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600354575] [2020-12-23 09:27:34,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:27:34,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:27:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:27:34,152 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-12-23 09:27:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:34,361 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 09:27:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:27:34,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-23 09:27:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:34,363 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:27:34,363 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 09:27:34,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-12-23 09:27:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 09:27:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 09:27:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 09:27:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 09:27:34,371 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-23 09:27:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:34,372 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 09:27:34,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:27:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 09:27:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 09:27:34,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:34,373 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:34,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:27:34,588 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-23 09:27:34,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:34,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075733] [2020-12-23 09:27:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:34,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 09:27:35,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075733] [2020-12-23 09:27:35,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999719654] [2020-12-23 09:27:35,102 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 09:27:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 09:27:35,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:35,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 09:27:35,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511050219] [2020-12-23 09:27:35,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:27:35,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:35,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:27:35,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:27:35,373 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-23 09:27:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:35,594 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 09:27:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:27:35,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-12-23 09:27:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:35,596 INFO L225 Difference]: With dead ends: 58 [2020-12-23 09:27:35,596 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 09:27:35,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:27:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 09:27:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 09:27:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 09:27:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 09:27:35,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-23 09:27:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:35,612 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 09:27:35,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:27:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 09:27:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 09:27:35,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:35,613 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:35,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:27:35,829 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-23 09:27:35,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:35,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653666711] [2020-12-23 09:27:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:35,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 09:27:36,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653666711] [2020-12-23 09:27:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372132439] [2020-12-23 09:27:36,454 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:36,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:36,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 09:27:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 09:27:36,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:36,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 09:27:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690049686] [2020-12-23 09:27:36,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:27:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:27:36,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:27:36,797 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-12-23 09:27:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:37,084 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 09:27:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:27:37,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-12-23 09:27:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:37,087 INFO L225 Difference]: With dead ends: 61 [2020-12-23 09:27:37,087 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 09:27:37,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:27:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 09:27:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 09:27:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 09:27:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 09:27:37,113 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-23 09:27:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:37,113 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 09:27:37,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:27:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 09:27:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 09:27:37,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:37,116 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:37,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:37,332 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-23 09:27:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:37,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772214037] [2020-12-23 09:27:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:37,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:38,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-23 09:27:39,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772214037] [2020-12-23 09:27:39,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614680424] [2020-12-23 09:27:39,032 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:39,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:27:39,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:39,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 137 conjunts are in the unsatisfiable core [2020-12-23 09:27:39,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-12-23 09:27:41,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:41,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-12-23 09:27:41,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001076907] [2020-12-23 09:27:41,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 09:27:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 09:27:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5037, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 09:27:41,603 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 74 states. [2020-12-23 09:27:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:46,082 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-23 09:27:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 09:27:46,083 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-12-23 09:27:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:46,084 INFO L225 Difference]: With dead ends: 60 [2020-12-23 09:27:46,084 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:27:46,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=915, Invalid=11075, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 09:27:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:27:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:27:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:27:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:27:46,090 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2020-12-23 09:27:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:46,090 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:27:46,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 09:27:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:27:46,090 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:27:46,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:27:46,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:27:46,349 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:27:46,349 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:27:46,349 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:27:46,349 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:27:46,350 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-23 09:27:46,350 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-23 09:27:46,350 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-23 09:27:46,350 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 15) (= ULTIMATE.start_main_~b~0 0)) [2020-12-23 09:27:46,350 INFO L189 CegarLoopUtils]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-23 09:27:46,350 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-23 09:27:46,350 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-12-23 09:27:46,351 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-12-23 09:27:46,351 INFO L189 CegarLoopUtils]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-12-23 09:27:46,351 INFO L189 CegarLoopUtils]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-12-23 09:27:46,351 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-12-23 09:27:46,351 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-12-23 09:27:46,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:46 BoogieIcfgContainer [2020-12-23 09:27:46,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:46,357 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:46,358 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:46,358 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:46,358 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:23" (3/4) ... [2020-12-23 09:27:46,362 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:27:46,370 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-12-23 09:27:46,374 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:27:46,375 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-23 09:27:46,375 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:46,375 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:46,411 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_15x0-1.c-witness.graphml [2020-12-23 09:27:46,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:46,414 INFO L168 Benchmark]: Toolchain (without parser) took 24213.41 ms. Allocated memory was 151.0 MB in the beginning and 405.8 MB in the end (delta: 254.8 MB). Free memory was 127.0 MB in the beginning and 332.2 MB in the end (delta: -205.1 MB). Peak memory consumption was 50.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:46,414 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:46,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:46,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.30 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:46,416 INFO L168 Benchmark]: Boogie Preprocessor took 32.25 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 115.4 MB in the end (delta: 863.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:46,416 INFO L168 Benchmark]: RCFGBuilder took 364.54 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 103.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:46,417 INFO L168 Benchmark]: TraceAbstraction took 23339.60 ms. Allocated memory was 151.0 MB in the beginning and 405.8 MB in the end (delta: 254.8 MB). Free memory was 103.2 MB in the beginning and 334.3 MB in the end (delta: -231.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:46,417 INFO L168 Benchmark]: Witness Printer took 54.32 ms. Allocated memory is still 405.8 MB. Free memory was 334.3 MB in the beginning and 332.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:46,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 363.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.30 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.25 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 115.4 MB in the end (delta: 863.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 364.54 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 103.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23339.60 ms. Allocated memory was 151.0 MB in the beginning and 405.8 MB in the end (delta: 254.8 MB). Free memory was 103.2 MB in the beginning and 334.3 MB in the end (delta: -231.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 8.0 GB. * Witness Printer took 54.32 ms. Allocated memory is still 405.8 MB. Free memory was 334.3 MB in the beginning and 332.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.1s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 518 SDslu, 1308 SDs, 0 SdLazy, 2195 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1485 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1719 ConstructedInterpolants, 0 QuantifiedInterpolants, 393042 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3015 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...