/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/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:26:36,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:26:36,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:26:36,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:26:36,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:26:36,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:26:36,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:26:36,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:26:36,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:26:36,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:26:36,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:26:36,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:26:36,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:26:36,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:26:36,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:26:36,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:26:36,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:26:36,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:26:36,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:26:36,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:26:36,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:26:36,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:26:36,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:26:36,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:26:36,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:26:36,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:26:36,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:26:36,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:26:36,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:26:36,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:26:36,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:26:36,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:26:36,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:26:36,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:26:36,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:26:36,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:26:36,456 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 09:26:36,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:26:36,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:26:36,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:26:36,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:26:36,490 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:26:36,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:26:36,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:26:36,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:26:36,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:26:36,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:26:36,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:26:36,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:26:36,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:26:36,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:26:36,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:26:36,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:26:36,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:26:36,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:26:36,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:26:36,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:26:36,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:26:36,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:26:36,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:26:36,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:26:36,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:26:36,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:26:36,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:26:36,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:26:36,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:26:36,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:26:36,921 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:26:36,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-12-23 09:26:37,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eff098c5e/0b6f1bacaaf5451aadaf8377f9542166/FLAGbb838da02 [2020-12-23 09:26:37,553 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:26:37,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-12-23 09:26:37,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eff098c5e/0b6f1bacaaf5451aadaf8377f9542166/FLAGbb838da02 [2020-12-23 09:26:37,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eff098c5e/0b6f1bacaaf5451aadaf8377f9542166 [2020-12-23 09:26:37,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:26:37,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:26:37,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:37,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:26:37,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:26:37,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:37" (1/1) ... [2020-12-23 09:26:37,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3057f838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:37, skipping insertion in model container [2020-12-23 09:26:37,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:37" (1/1) ... [2020-12-23 09:26:37,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:26:37,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:26:38,170 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/id_i15_o15-1.c[454,467] [2020-12-23 09:26:38,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:38,188 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:26:38,205 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/id_i15_o15-1.c[454,467] [2020-12-23 09:26:38,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:38,223 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:26:38,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38 WrapperNode [2020-12-23 09:26:38,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:38,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:38,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:26:38,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:26:38,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:38,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:26:38,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:26:38,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:26:38,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (1/1) ... [2020-12-23 09:26:38,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:26:38,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:26:38,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:26:38,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:26:38,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (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 09:26:38,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:26:38,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:26:38,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:26:38,404 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-23 09:26:38,404 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-23 09:26:38,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:26:38,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:26:38,666 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:26:38,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:38 BoogieIcfgContainer [2020-12-23 09:26:38,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:26:38,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:26:38,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:26:38,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:26:38,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:26:37" (1/3) ... [2020-12-23 09:26:38,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd4c6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:38, skipping insertion in model container [2020-12-23 09:26:38,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:38" (2/3) ... [2020-12-23 09:26:38,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd4c6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:38, skipping insertion in model container [2020-12-23 09:26:38,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:38" (3/3) ... [2020-12-23 09:26:38,679 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-12-23 09:26:38,687 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:26:38,692 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:26:38,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:26:38,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:26:38,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:26:38,763 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:26:38,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:26:38,764 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:26:38,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:26:38,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:26:38,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:26:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:26:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:26:38,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:38,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:38,792 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:26:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:38,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307195125] [2020-12-23 09:26:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:39,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:39,092 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 09:26:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307195125] [2020-12-23 09:26:39,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:26:39,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:26:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422475883] [2020-12-23 09:26:39,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:26:39,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:26:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:26:39,163 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:26:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:39,281 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:26:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:26:39,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:26:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:39,299 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:26:39,299 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:26:39,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:26:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:26:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:26:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:26:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:26:39,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:26:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:39,352 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:26:39,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:26:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:26:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:26:39,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:39,355 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:39,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:26:39,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:26:39,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:39,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061719453] [2020-12-23 09:26:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:39,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:39,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:39,505 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 09:26:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061719453] [2020-12-23 09:26:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042817652] [2020-12-23 09:26:39,510 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 09:26:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:39,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:26:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:39,805 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 09:26:39,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:39,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 09:26:39,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110343052] [2020-12-23 09:26:39,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:26:39,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:26:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:26:39,809 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2020-12-23 09:26:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:39,905 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:26:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:26:39,906 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 09:26:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:39,907 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:26:39,907 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:26:39,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:26:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:26:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:26:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:26:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:26:39,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:26:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:39,916 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:26:39,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:26:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:26:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:26:39,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:39,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:40,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:26:40,133 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:40,135 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:26:40,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:40,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124773550] [2020-12-23 09:26:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,277 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 09:26:40,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124773550] [2020-12-23 09:26:40,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485312384] [2020-12-23 09:26:40,278 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 09:26:40,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:40,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:40,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:40,434 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 09:26:40,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:40,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 09:26:40,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422919734] [2020-12-23 09:26:40,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:26:40,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:26:40,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:26:40,437 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-12-23 09:26:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:40,506 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:26:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:26:40,506 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 09:26:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:40,508 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:26:40,508 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:26:40,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:26:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:26:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:26:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:26:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:26:40,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:26:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:40,515 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:26:40,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:26:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:26:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:26:40,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:40,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:40,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:40,732 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:40,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:26:40,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:40,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579217370] [2020-12-23 09:26:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:40,968 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 09:26:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579217370] [2020-12-23 09:26:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582218428] [2020-12-23 09:26:40,969 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 09:26:41,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:26:41,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:26:41,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:41,173 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 09:26:41,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:41,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-23 09:26:41,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151700204] [2020-12-23 09:26:41,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:26:41,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:41,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:26:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:26:41,176 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-12-23 09:26:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:41,250 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 09:26:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:26:41,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-12-23 09:26:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:41,253 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:26:41,253 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:26:41,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:26:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:26:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:26:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:26:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 09:26:41,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-23 09:26:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:41,270 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 09:26:41,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:26:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 09:26:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 09:26:41,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:41,275 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:41,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:41,488 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-23 09:26:41,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:41,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872342229] [2020-12-23 09:26:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:41,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:41,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:41,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:41,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:41,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:41,706 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 09:26:41,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872342229] [2020-12-23 09:26:41,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300730928] [2020-12-23 09:26:41,707 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 09:26:41,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:41,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:26:41,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:41,891 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 09:26:41,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:41,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-12-23 09:26:41,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645582814] [2020-12-23 09:26:41,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:26:41,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:26:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:26:41,895 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-12-23 09:26:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:41,977 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 09:26:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:26:41,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-12-23 09:26:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:41,980 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:26:41,980 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:26:41,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:26:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:26:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:26:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:26:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 09:26:41,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-23 09:26:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:41,988 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 09:26:41,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:26:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 09:26:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:26:41,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:41,990 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:42,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:42,204 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-23 09:26:42,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:42,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155303658] [2020-12-23 09:26:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,380 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 09:26:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155303658] [2020-12-23 09:26:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236797983] [2020-12-23 09:26:42,381 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 09:26:42,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:26:42,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:26:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:42,555 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 09:26:42,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:42,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-12-23 09:26:42,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092881703] [2020-12-23 09:26:42,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:26:42,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:26:42,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:26:42,558 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-12-23 09:26:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:42,647 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 09:26:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:26:42,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-12-23 09:26:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:42,649 INFO L225 Difference]: With dead ends: 34 [2020-12-23 09:26:42,649 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 09:26:42,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:26:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 09:26:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 09:26:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:26:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 09:26:42,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-23 09:26:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:42,656 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 09:26:42,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:26:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 09:26:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:26:42,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:42,658 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:42,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:26:42,873 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-23 09:26:42,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:42,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212274722] [2020-12-23 09:26:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:42,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,091 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 09:26:43,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212274722] [2020-12-23 09:26:43,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016383601] [2020-12-23 09:26:43,092 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 09:26:43,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:26:43,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:26:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:43,263 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 09:26:43,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:43,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2020-12-23 09:26:43,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843848654] [2020-12-23 09:26:43,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:26:43,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:43,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:26:43,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:26:43,266 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-12-23 09:26:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:43,381 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 09:26:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:26:43,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 09:26:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:43,383 INFO L225 Difference]: With dead ends: 37 [2020-12-23 09:26:43,384 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 09:26:43,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 09:26:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 09:26:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:26:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 09:26:43,391 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-23 09:26:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:43,391 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 09:26:43,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:26:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 09:26:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:26:43,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:43,393 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:43,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:43,606 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:43,608 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-23 09:26:43,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:43,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439051594] [2020-12-23 09:26:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,879 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 09:26:43,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439051594] [2020-12-23 09:26:43,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202890464] [2020-12-23 09:26:43,881 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 09:26:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:26:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:44,112 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 09:26:44,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:44,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-12-23 09:26:44,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682566335] [2020-12-23 09:26:44,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:26:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:26:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:26:44,115 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 15 states. [2020-12-23 09:26:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:44,262 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 09:26:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:26:44,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-12-23 09:26:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:44,266 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:26:44,267 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 09:26:44,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:26:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 09:26:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 09:26:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:26:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 09:26:44,274 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-23 09:26:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:44,274 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 09:26:44,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:26:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 09:26:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:26:44,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:44,275 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:44,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:44,489 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-23 09:26:44,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:44,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193507541] [2020-12-23 09:26:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,768 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 09:26:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193507541] [2020-12-23 09:26:44,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876928614] [2020-12-23 09:26:44,769 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 09:26:44,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:26:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:44,971 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 09:26:44,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:44,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2020-12-23 09:26:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805613365] [2020-12-23 09:26:44,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:26:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:26:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:26:44,974 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2020-12-23 09:26:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:45,109 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 09:26:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:26:45,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-12-23 09:26:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:45,112 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:26:45,112 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 09:26:45,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:26:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 09:26:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 09:26:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:26:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 09:26:45,119 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-23 09:26:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:45,120 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 09:26:45,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:26:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 09:26:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:26:45,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:45,121 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:45,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:26:45,335 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-23 09:26:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:45,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437644933] [2020-12-23 09:26:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,717 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 09:26:45,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437644933] [2020-12-23 09:26:45,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31595146] [2020-12-23 09:26:45,718 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 09:26:45,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:26:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:26:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:45,949 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 09:26:45,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:45,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-12-23 09:26:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811564875] [2020-12-23 09:26:45,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:26:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:26:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:26:45,952 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 17 states. [2020-12-23 09:26:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:46,110 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 09:26:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:26:46,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-12-23 09:26:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:46,112 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:26:46,112 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 09:26:46,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2020-12-23 09:26:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 09:26:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 09:26:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:26:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 09:26:46,119 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-23 09:26:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:46,120 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 09:26:46,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:26:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 09:26:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:26:46,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:46,121 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:46,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:46,336 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-23 09:26:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:46,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494801674] [2020-12-23 09:26:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,668 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 09:26:46,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494801674] [2020-12-23 09:26:46,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279371808] [2020-12-23 09:26:46,669 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 09:26:46,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:46,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:46,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:26:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:46,905 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 09:26:46,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:46,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2020-12-23 09:26:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262759168] [2020-12-23 09:26:46,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:26:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:26:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:26:46,907 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-12-23 09:26:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:47,099 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-23 09:26:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:26:47,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-12-23 09:26:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:47,101 INFO L225 Difference]: With dead ends: 49 [2020-12-23 09:26:47,101 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 09:26:47,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-12-23 09:26:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 09:26:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 09:26:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:26:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 09:26:47,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-23 09:26:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:47,109 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 09:26:47,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:26:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 09:26:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:26:47,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:47,110 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:47,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:47,324 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-23 09:26:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:47,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201622054] [2020-12-23 09:26:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,726 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 09:26:47,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201622054] [2020-12-23 09:26:47,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969101758] [2020-12-23 09:26:47,727 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 09:26:47,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:26:47,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:47,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 09:26:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:48,004 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 09:26:48,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:48,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-12-23 09:26:48,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172948849] [2020-12-23 09:26:48,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:26:48,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:26:48,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:26:48,007 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-12-23 09:26:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:48,223 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 09:26:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:26:48,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-12-23 09:26:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:48,229 INFO L225 Difference]: With dead ends: 52 [2020-12-23 09:26:48,229 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 09:26:48,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=622, Unknown=0, NotChecked=0, Total=930 [2020-12-23 09:26:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 09:26:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 09:26:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 09:26:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 09:26:48,245 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-23 09:26:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:48,245 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 09:26:48,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:26:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 09:26:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:26:48,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:48,250 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:48,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 09:26:48,451 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-23 09:26:48,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:48,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775365849] [2020-12-23 09:26:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,907 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 09:26:48,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775365849] [2020-12-23 09:26:48,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62956975] [2020-12-23 09:26:48,908 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 09:26:48,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:26:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 09:26:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:49,153 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 09:26:49,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:49,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2020-12-23 09:26:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044970201] [2020-12-23 09:26:49,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:26:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:26:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:26:49,155 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 20 states. [2020-12-23 09:26:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:49,359 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 09:26:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:26:49,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-12-23 09:26:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:49,363 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:26:49,363 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 09:26:49,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:26:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 09:26:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 09:26:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 09:26:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 09:26:49,388 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-23 09:26:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:49,388 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 09:26:49,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:26:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 09:26:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 09:26:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:49,393 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:49,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:26:49,594 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-23 09:26:49,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:49,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462195024] [2020-12-23 09:26:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,160 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 09:26:50,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462195024] [2020-12-23 09:26:50,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762966043] [2020-12-23 09:26:50,161 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 09:26:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 09:26:50,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:50,480 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 09:26:50,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:50,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-12-23 09:26:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3346949] [2020-12-23 09:26:50,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:26:50,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:26:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:50,483 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-12-23 09:26:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:50,711 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 09:26:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:26:50,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2020-12-23 09:26:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:50,713 INFO L225 Difference]: With dead ends: 58 [2020-12-23 09:26:50,713 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 09:26:50,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:26:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 09:26:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 09:26:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 09:26:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 09:26:50,721 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-23 09:26:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:50,722 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 09:26:50,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:26:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 09:26:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 09:26:50,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:50,723 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:50,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:26:50,937 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-23 09:26:50,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:50,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095423972] [2020-12-23 09:26:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,567 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 09:26:51,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095423972] [2020-12-23 09:26:51,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574097101] [2020-12-23 09:26:51,568 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 09:26:51,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:51,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:51,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 09:26:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:51,860 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 09:26:51,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:51,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-12-23 09:26:51,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666885185] [2020-12-23 09:26:51,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 09:26:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:51,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 09:26:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:26:51,863 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 22 states. [2020-12-23 09:26:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:52,110 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 09:26:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:26:52,110 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 94 [2020-12-23 09:26:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:52,112 INFO L225 Difference]: With dead ends: 61 [2020-12-23 09:26:52,112 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 09:26:52,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 09:26:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 09:26:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 09:26:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 09:26:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 09:26:52,120 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-23 09:26:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:52,120 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 09:26:52,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 09:26:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 09:26:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 09:26:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:52,122 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:52,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:52,337 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-23 09:26:52,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:52,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123655786] [2020-12-23 09:26:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 09:26:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123655786] [2020-12-23 09:26:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116963464] [2020-12-23 09:26:53,862 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 09:26:53,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:26:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:53,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 09:26:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 09:26:54,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:54,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-12-23 09:26:54,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445572215] [2020-12-23 09:26:54,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 09:26:54,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:54,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 09:26:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:26:54,145 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 35 states. [2020-12-23 09:26:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:54,646 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 09:26:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 09:26:54,646 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2020-12-23 09:26:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:54,647 INFO L225 Difference]: With dead ends: 64 [2020-12-23 09:26:54,647 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 09:26:54,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:26:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 09:26:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 09:26:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 09:26:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 09:26:54,659 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-12-23 09:26:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:54,660 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 09:26:54,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 09:26:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 09:26:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:26:54,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:54,663 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:54,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:26:54,878 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:54,879 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2020-12-23 09:26:54,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:54,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368880837] [2020-12-23 09:26:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 09:26:55,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368880837] [2020-12-23 09:26:55,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312409524] [2020-12-23 09:26:55,542 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:55,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:55,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 09:26:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 09:26:55,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 09:26:55,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-12-23 09:26:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323086792] [2020-12-23 09:26:55,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:26:55,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:55,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:26:55,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:26:55,850 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-12-23 09:26:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:56,262 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-23 09:26:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 09:26:56,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-12-23 09:26:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:56,263 INFO L225 Difference]: With dead ends: 60 [2020-12-23 09:26:56,263 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:26:56,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:26:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:26:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:26:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:26:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:26:56,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2020-12-23 09:26:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:56,265 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:26:56,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:26:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:26:56,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:26:56,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 09:26:56,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:26:56,509 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:26:56,509 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:26:56,509 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:26:56,509 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:26:56,510 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-23 09:26:56,510 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-23 09:26:56,510 INFO L189 CegarLoopUtils]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-12-23 09:26:56,510 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (= 15 ULTIMATE.start_main_~input~0) [2020-12-23 09:26:56,511 INFO L189 CegarLoopUtils]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-23 09:26:56,512 INFO L189 CegarLoopUtils]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-12-23 09:26:56,512 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-12-23 09:26:56,512 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-12-23 09:26:56,512 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-12-23 09:26:56,512 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-12-23 09:26:56,512 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-23 09:26:56,512 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-12-23 09:26:56,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:26:56 BoogieIcfgContainer [2020-12-23 09:26:56,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:26:56,519 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:26:56,519 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:26:56,519 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:26:56,520 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:38" (3/4) ... [2020-12-23 09:26:56,524 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:26:56,533 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-12-23 09:26:56,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:26:56,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:26:56,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:26:56,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:26:56,592 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_i15_o15-1.c-witness.graphml [2020-12-23 09:26:56,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:26:56,595 INFO L168 Benchmark]: Toolchain (without parser) took 18642.18 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 127.4 MB in the beginning and 276.5 MB in the end (delta: -149.2 MB). Peak memory consumption was 82.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,601 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:26:56,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.95 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.33 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,603 INFO L168 Benchmark]: Boogie Preprocessor took 20.54 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.7 MB in the end (delta: 951.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,604 INFO L168 Benchmark]: RCFGBuilder took 383.52 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 104.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,604 INFO L168 Benchmark]: TraceAbstraction took 17848.43 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 104.2 MB in the beginning and 278.6 MB in the end (delta: -174.4 MB). Peak memory consumption was 56.9 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,604 INFO L168 Benchmark]: Witness Printer took 72.77 ms. Allocated memory is still 381.7 MB. Free memory was 278.6 MB in the beginning and 276.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:26:56,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.95 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.33 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.54 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.7 MB in the end (delta: 951.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.52 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 104.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17848.43 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 104.2 MB in the beginning and 278.6 MB in the end (delta: -174.4 MB). Peak memory consumption was 56.9 MB. Max. memory is 8.0 GB. * Witness Printer took 72.77 ms. Allocated memory is still 381.7 MB. Free memory was 278.6 MB in the beginning and 276.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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: 17.7s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 233 SDtfs, 510 SDslu, 1903 SDs, 0 SdLazy, 1410 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1623 GetRequests, 1237 SyntacticMatches, 2 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 1962 NumberOfCodeBlocks, 1962 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1929 ConstructedInterpolants, 0 QuantifiedInterpolants, 383745 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2736 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 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...