/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/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:21:26,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:21:26,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:21:26,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:21:26,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:21:26,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:21:26,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:21:26,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:21:26,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:21:26,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:21:26,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:21:26,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:21:26,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:21:26,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:21:26,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:21:26,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:21:26,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:21:26,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:21:26,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:21:26,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:21:26,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:21:26,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:21:26,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:21:26,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:21:26,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:21:26,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:21:26,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:21:26,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:21:26,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:21:26,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:21:26,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:21:26,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:21:26,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:21:26,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:21:26,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:21:26,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:21:26,735 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 09:21:26,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:21:26,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:21:26,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:21:26,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:21:26,787 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:21:26,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:21:26,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:21:26,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:21:26,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:21:26,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:21:26,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:21:26,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:21:26,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:21:26,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:21:26,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:21:26,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:21:26,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:21:26,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:21:26,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:21:26,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:21:26,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:21:26,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:21:26,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:21:26,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:21:26,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:21:26,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:21:27,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:21:27,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:21:27,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:21:27,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:21:27,201 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:21:27,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2020-12-23 09:21:27,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b919af3fb/1d3e0c4a62b94febb6e0c4fe60386037/FLAGf970869be [2020-12-23 09:21:27,862 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:21:27,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2020-12-23 09:21:27,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b919af3fb/1d3e0c4a62b94febb6e0c4fe60386037/FLAGf970869be [2020-12-23 09:21:28,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b919af3fb/1d3e0c4a62b94febb6e0c4fe60386037 [2020-12-23 09:21:28,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:21:28,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:21:28,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:28,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:21:28,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:21:28,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e40d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28, skipping insertion in model container [2020-12-23 09:21:28,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:21:28,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:21:28,485 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/EvenOdd01-1.c[975,988] [2020-12-23 09:21:28,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:28,501 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:21:28,520 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/EvenOdd01-1.c[975,988] [2020-12-23 09:21:28,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:21:28,539 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:21:28,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28 WrapperNode [2020-12-23 09:21:28,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:21:28,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:28,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:21:28,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:21:28,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:21:28,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:21:28,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:21:28,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:21:28,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (1/1) ... [2020-12-23 09:21:28,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:21:28,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:21:28,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:21:28,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:21:28,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (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 09:21:28,725 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-12-23 09:21:28,725 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-12-23 09:21:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:21:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:21:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-12-23 09:21:28,726 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-12-23 09:21:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:21:28,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:21:29,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:21:29,114 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:21:29,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:29 BoogieIcfgContainer [2020-12-23 09:21:29,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:21:29,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:21:29,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:21:29,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:21:29,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:21:28" (1/3) ... [2020-12-23 09:21:29,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@332f1efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:29, skipping insertion in model container [2020-12-23 09:21:29,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:21:28" (2/3) ... [2020-12-23 09:21:29,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@332f1efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:21:29, skipping insertion in model container [2020-12-23 09:21:29,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:21:29" (3/3) ... [2020-12-23 09:21:29,164 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-12-23 09:21:29,196 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:21:29,207 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:21:29,228 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:21:29,276 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:21:29,276 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:21:29,276 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:21:29,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:21:29,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:21:29,277 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:21:29,277 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:21:29,277 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:21:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 09:21:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 09:21:29,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:29,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:29,311 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2020-12-23 09:21:29,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:29,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217110416] [2020-12-23 09:21:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:29,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:30,029 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 09:21:30,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217110416] [2020-12-23 09:21:30,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:30,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 09:21:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982539399] [2020-12-23 09:21:30,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:21:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:21:30,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:21:30,062 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 7 states. [2020-12-23 09:21:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:30,372 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-23 09:21:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:21:30,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 09:21:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:30,392 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:21:30,393 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:21:30,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:21:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:21:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:21:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:21:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 09:21:30,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2020-12-23 09:21:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:30,449 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 09:21:30,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:21:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 09:21:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 09:21:30,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:30,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:30,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:21:30,452 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2020-12-23 09:21:30,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:30,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234061490] [2020-12-23 09:21:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:30,691 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 14 [2020-12-23 09:21:30,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:30,738 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 09:21:30,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234061490] [2020-12-23 09:21:30,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:30,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 09:21:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49316436] [2020-12-23 09:21:30,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:21:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:21:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:21:30,743 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-12-23 09:21:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:30,835 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-23 09:21:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:21:30,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 09:21:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:30,837 INFO L225 Difference]: With dead ends: 30 [2020-12-23 09:21:30,838 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 09:21:30,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:21:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 09:21:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-23 09:21:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:21:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 09:21:30,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2020-12-23 09:21:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:30,852 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 09:21:30,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:21:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 09:21:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 09:21:30,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:30,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:30,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:21:30,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2020-12-23 09:21:30,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:30,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413723034] [2020-12-23 09:21:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:30,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:30,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:30,933 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 09:21:30,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413723034] [2020-12-23 09:21:30,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:30,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:21:30,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407748686] [2020-12-23 09:21:30,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:21:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:21:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:21:30,938 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-12-23 09:21:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:30,986 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-23 09:21:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:21:30,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 09:21:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:30,990 INFO L225 Difference]: With dead ends: 38 [2020-12-23 09:21:30,990 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 09:21:30,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 09:21:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 09:21:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-23 09:21:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:21:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-23 09:21:30,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-12-23 09:21:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:30,997 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-23 09:21:30,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:21:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-23 09:21:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 09:21:30,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:30,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:30,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:21:30,998 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2020-12-23 09:21:30,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:30,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134291263] [2020-12-23 09:21:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,183 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 09:21:31,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134291263] [2020-12-23 09:21:31,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:31,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 09:21:31,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010269465] [2020-12-23 09:21:31,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:21:31,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:31,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:21:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:21:31,186 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2020-12-23 09:21:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:31,360 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 09:21:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:21:31,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 09:21:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:31,362 INFO L225 Difference]: With dead ends: 33 [2020-12-23 09:21:31,362 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 09:21:31,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:21:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 09:21:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-23 09:21:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:21:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 09:21:31,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-12-23 09:21:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:31,370 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 09:21:31,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:21:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 09:21:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:21:31,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:31,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:31,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:21:31,372 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2020-12-23 09:21:31,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:31,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533488772] [2020-12-23 09:21:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 09:21:31,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533488772] [2020-12-23 09:21:31,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:21:31,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:21:31,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051639453] [2020-12-23 09:21:31,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:21:31,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:31,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:21:31,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:21:31,504 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-12-23 09:21:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:31,560 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 09:21:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:21:31,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-23 09:21:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:31,563 INFO L225 Difference]: With dead ends: 39 [2020-12-23 09:21:31,563 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:21:31,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 09:21:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:21:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:21:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:21:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-23 09:21:31,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2020-12-23 09:21:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:31,579 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-23 09:21:31,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:21:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-23 09:21:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 09:21:31,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:31,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:31,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:21:31,583 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2020-12-23 09:21:31,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:31,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907392800] [2020-12-23 09:21:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 09:21:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907392800] [2020-12-23 09:21:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614750704] [2020-12-23 09:21:32,018 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 09:21:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 09:21:32,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 09:21:32,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:32,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-12-23 09:21:32,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288007668] [2020-12-23 09:21:32,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:21:32,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:21:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:21:32,396 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 15 states. [2020-12-23 09:21:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:32,619 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-23 09:21:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:21:32,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 09:21:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:32,622 INFO L225 Difference]: With dead ends: 39 [2020-12-23 09:21:32,622 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 09:21:32,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:21:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 09:21:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-23 09:21:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:21:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 09:21:32,634 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-12-23 09:21:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:32,634 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 09:21:32,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:21:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 09:21:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 09:21:32,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:32,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:32,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:21:32,850 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:32,851 INFO L82 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2020-12-23 09:21:32,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:32,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423138092] [2020-12-23 09:21:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:21:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423138092] [2020-12-23 09:21:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70179391] [2020-12-23 09:21:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 09:21:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:21:33,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:33,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2020-12-23 09:21:33,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177792556] [2020-12-23 09:21:33,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:21:33,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:21:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:21:33,357 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 16 states. [2020-12-23 09:21:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:33,687 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-23 09:21:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:21:33,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-23 09:21:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:33,689 INFO L225 Difference]: With dead ends: 45 [2020-12-23 09:21:33,689 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 09:21:33,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:21:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 09:21:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-12-23 09:21:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:21:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 09:21:33,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2020-12-23 09:21:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:33,696 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 09:21:33,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:21:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 09:21:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:21:33,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:33,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:33,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:33,914 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2020-12-23 09:21:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:33,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214572804] [2020-12-23 09:21:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 09:21:34,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214572804] [2020-12-23 09:21:34,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566680166] [2020-12-23 09:21:34,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:34,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:21:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 09:21:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 09:21:34,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:34,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-12-23 09:21:34,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981314443] [2020-12-23 09:21:34,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:21:34,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:21:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:21:34,730 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 19 states. [2020-12-23 09:21:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:35,192 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-23 09:21:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:21:35,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-12-23 09:21:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:35,194 INFO L225 Difference]: With dead ends: 51 [2020-12-23 09:21:35,194 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 09:21:35,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-12-23 09:21:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 09:21:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-12-23 09:21:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:21:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 09:21:35,201 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2020-12-23 09:21:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:35,201 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 09:21:35,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:21:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 09:21:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 09:21:35,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:35,203 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:35,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:35,417 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2020-12-23 09:21:35,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:35,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90874850] [2020-12-23 09:21:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 09:21:35,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90874850] [2020-12-23 09:21:35,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536101289] [2020-12-23 09:21:35,931 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 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 09:21:35,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:21:35,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 09:21:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 09:21:36,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:36,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 09:21:36,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491060549] [2020-12-23 09:21:36,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:21:36,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:36,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:21:36,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:21:36,219 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 20 states. [2020-12-23 09:21:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:36,774 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-23 09:21:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:21:36,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-12-23 09:21:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:36,776 INFO L225 Difference]: With dead ends: 57 [2020-12-23 09:21:36,776 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 09:21:36,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:21:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 09:21:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-12-23 09:21:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:21:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 09:21:36,784 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2020-12-23 09:21:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:36,784 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 09:21:36,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:21:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 09:21:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 09:21:36,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:36,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:36,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:36,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2020-12-23 09:21:36,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:36,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070598004] [2020-12-23 09:21:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 09:21:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070598004] [2020-12-23 09:21:37,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461220320] [2020-12-23 09:21:37,591 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 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 09:21:37,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:21:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 09:21:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 09:21:37,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:37,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2020-12-23 09:21:37,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558071826] [2020-12-23 09:21:37,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 09:21:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 09:21:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:21:37,929 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 23 states. [2020-12-23 09:21:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:38,601 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-12-23 09:21:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 09:21:38,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-23 09:21:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:38,603 INFO L225 Difference]: With dead ends: 63 [2020-12-23 09:21:38,603 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 09:21:38,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 09:21:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 09:21:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-12-23 09:21:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:21:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-23 09:21:38,613 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2020-12-23 09:21:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:38,614 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-23 09:21:38,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 09:21:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-23 09:21:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 09:21:38,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:38,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:38,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 09:21:38,829 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:38,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2020-12-23 09:21:38,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:38,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103714058] [2020-12-23 09:21:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 09:21:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103714058] [2020-12-23 09:21:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795683114] [2020-12-23 09:21:39,439 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 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 09:21:39,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:21:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 09:21:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 09:21:39,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:39,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 09:21:39,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654399743] [2020-12-23 09:21:39,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 09:21:39,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 09:21:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:21:39,769 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 24 states. [2020-12-23 09:21:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:40,587 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-12-23 09:21:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 09:21:40,587 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2020-12-23 09:21:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:40,589 INFO L225 Difference]: With dead ends: 69 [2020-12-23 09:21:40,589 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 09:21:40,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 09:21:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 09:21:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2020-12-23 09:21:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:21:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-23 09:21:40,602 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2020-12-23 09:21:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:40,603 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-23 09:21:40,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 09:21:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-23 09:21:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 09:21:40,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:40,604 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:40,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:40,816 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2020-12-23 09:21:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:40,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760923226] [2020-12-23 09:21:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:40,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 09:21:41,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760923226] [2020-12-23 09:21:41,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985555642] [2020-12-23 09:21:41,585 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 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 09:21:41,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:21:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 09:21:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-23 09:21:41,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:41,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2020-12-23 09:21:41,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88541936] [2020-12-23 09:21:41,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 09:21:41,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 09:21:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-12-23 09:21:41,933 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 27 states. [2020-12-23 09:21:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:42,869 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-23 09:21:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:21:42,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-12-23 09:21:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:42,872 INFO L225 Difference]: With dead ends: 75 [2020-12-23 09:21:42,872 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 09:21:42,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 09:21:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 09:21:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-12-23 09:21:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 09:21:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 09:21:42,898 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2020-12-23 09:21:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:42,900 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 09:21:42,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 09:21:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 09:21:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 09:21:42,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:42,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:43,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:43,108 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2020-12-23 09:21:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:43,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193999417] [2020-12-23 09:21:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-23 09:21:43,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193999417] [2020-12-23 09:21:43,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259093655] [2020-12-23 09:21:43,872 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 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 09:21:43,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:21:43,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:43,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 09:21:43,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-23 09:21:44,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:44,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-23 09:21:44,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407845018] [2020-12-23 09:21:44,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 09:21:44,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:44,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 09:21:44,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:21:44,263 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 28 states. [2020-12-23 09:21:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:45,315 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-23 09:21:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 09:21:45,316 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-12-23 09:21:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:45,317 INFO L225 Difference]: With dead ends: 81 [2020-12-23 09:21:45,317 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 09:21:45,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 09:21:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 09:21:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2020-12-23 09:21:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 09:21:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-23 09:21:45,325 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2020-12-23 09:21:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:45,325 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-23 09:21:45,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 09:21:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-23 09:21:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:21:45,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:45,327 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:45,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:21:45,540 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2020-12-23 09:21:45,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:45,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880552758] [2020-12-23 09:21:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:45,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:45,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:45,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:45,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 09:21:46,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880552758] [2020-12-23 09:21:46,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050791055] [2020-12-23 09:21:46,513 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 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 09:21:46,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:21:46,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:46,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-23 09:21:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 09:21:46,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:46,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2020-12-23 09:21:46,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414238420] [2020-12-23 09:21:46,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 09:21:46,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 09:21:46,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-12-23 09:21:46,993 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 31 states. [2020-12-23 09:21:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:48,341 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-12-23 09:21:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 09:21:48,342 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-12-23 09:21:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:48,343 INFO L225 Difference]: With dead ends: 87 [2020-12-23 09:21:48,343 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 09:21:48,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=156, Invalid=2600, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 09:21:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 09:21:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-12-23 09:21:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 09:21:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-23 09:21:48,352 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2020-12-23 09:21:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:48,353 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-23 09:21:48,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 09:21:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-23 09:21:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 09:21:48,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:48,354 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:48,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:21:48,564 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2020-12-23 09:21:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:48,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327974133] [2020-12-23 09:21:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:48,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-23 09:21:49,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327974133] [2020-12-23 09:21:49,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124427541] [2020-12-23 09:21:49,583 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 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 09:21:49,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:21:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 104 conjunts are in the unsatisfiable core [2020-12-23 09:21:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-23 09:21:49,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:49,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 33 [2020-12-23 09:21:49,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246280895] [2020-12-23 09:21:49,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:21:49,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:21:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=987, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:21:49,993 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 33 states. [2020-12-23 09:21:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:51,690 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-23 09:21:51,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 09:21:51,690 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 89 [2020-12-23 09:21:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:51,691 INFO L225 Difference]: With dead ends: 93 [2020-12-23 09:21:51,691 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 09:21:51,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 09:21:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 09:21:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-12-23 09:21:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 09:21:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-23 09:21:51,700 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2020-12-23 09:21:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:51,700 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-23 09:21:51,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:21:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-23 09:21:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 09:21:51,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:51,702 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 09:21:51,916 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2020-12-23 09:21:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:51,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625070637] [2020-12-23 09:21:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:52,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-23 09:21:53,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625070637] [2020-12-23 09:21:53,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333058340] [2020-12-23 09:21:53,142 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 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 09:21:53,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:21:53,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 112 conjunts are in the unsatisfiable core [2020-12-23 09:21:53,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-23 09:21:53,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:53,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2020-12-23 09:21:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614785983] [2020-12-23 09:21:53,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 09:21:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 09:21:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 09:21:53,611 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 35 states. [2020-12-23 09:21:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:55,360 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-23 09:21:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 09:21:55,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 96 [2020-12-23 09:21:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:55,362 INFO L225 Difference]: With dead ends: 99 [2020-12-23 09:21:55,363 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 09:21:55,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=180, Invalid=3480, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 09:21:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 09:21:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2020-12-23 09:21:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 09:21:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-23 09:21:55,371 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2020-12-23 09:21:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:55,371 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-23 09:21:55,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 09:21:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-23 09:21:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 09:21:55,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:55,373 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:55,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:21:55,586 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2020-12-23 09:21:55,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:55,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850443720] [2020-12-23 09:21:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:55,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:55,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:55,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:55,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:55,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 09:21:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850443720] [2020-12-23 09:21:56,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267305640] [2020-12-23 09:21:56,857 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 09:21:56,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:21:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:21:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 120 conjunts are in the unsatisfiable core [2020-12-23 09:21:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:21:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 09:21:57,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:21:57,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 36 [2020-12-23 09:21:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433042153] [2020-12-23 09:21:57,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 09:21:57,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:21:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 09:21:57,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 09:21:57,345 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 36 states. [2020-12-23 09:21:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:21:59,408 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-12-23 09:21:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 09:21:59,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2020-12-23 09:21:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:21:59,410 INFO L225 Difference]: With dead ends: 105 [2020-12-23 09:21:59,410 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 09:21:59,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 09:21:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 09:21:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2020-12-23 09:21:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:21:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-12-23 09:21:59,423 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2020-12-23 09:21:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:21:59,423 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-12-23 09:21:59,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 09:21:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-12-23 09:21:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 09:21:59,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:21:59,424 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:21:59,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 09:21:59,640 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:21:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:21:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2020-12-23 09:21:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:21:59,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200796704] [2020-12-23 09:21:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:21:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:59,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:59,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:59,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:21:59,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:21:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 09:22:01,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200796704] [2020-12-23 09:22:01,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195318362] [2020-12-23 09:22:01,197 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 09:22:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 128 conjunts are in the unsatisfiable core [2020-12-23 09:22:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-23 09:22:01,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:01,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2020-12-23 09:22:01,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928195047] [2020-12-23 09:22:01,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 09:22:01,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 09:22:01,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 09:22:01,727 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 39 states. [2020-12-23 09:22:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:03,793 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-23 09:22:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 09:22:03,794 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2020-12-23 09:22:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:03,795 INFO L225 Difference]: With dead ends: 111 [2020-12-23 09:22:03,795 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 09:22:03,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=204, Invalid=4488, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 09:22:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 09:22:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2020-12-23 09:22:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 09:22:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-23 09:22:03,802 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2020-12-23 09:22:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:03,802 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-23 09:22:03,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 09:22:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-23 09:22:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 09:22:03,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:03,804 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:04,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 09:22:04,018 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:04,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2020-12-23 09:22:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:04,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053258244] [2020-12-23 09:22:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:04,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:05,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:05,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:05,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:05,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-23 09:22:05,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053258244] [2020-12-23 09:22:05,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807280790] [2020-12-23 09:22:05,670 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 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 09:22:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 136 conjunts are in the unsatisfiable core [2020-12-23 09:22:05,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-23 09:22:06,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:06,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2020-12-23 09:22:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689066908] [2020-12-23 09:22:06,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 09:22:06,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 09:22:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1555, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:22:06,268 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 41 states. [2020-12-23 09:22:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:08,822 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-12-23 09:22:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 09:22:08,822 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 117 [2020-12-23 09:22:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:08,824 INFO L225 Difference]: With dead ends: 117 [2020-12-23 09:22:08,824 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 09:22:08,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=215, Invalid=5041, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 09:22:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 09:22:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-12-23 09:22:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 09:22:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-23 09:22:08,831 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2020-12-23 09:22:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:08,832 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-23 09:22:08,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 09:22:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-23 09:22:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 09:22:08,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:08,833 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:09,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:09,048 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2020-12-23 09:22:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:09,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934037382] [2020-12-23 09:22:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:09,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-23 09:22:10,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934037382] [2020-12-23 09:22:10,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656394134] [2020-12-23 09:22:10,806 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 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 09:22:10,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:22:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 144 conjunts are in the unsatisfiable core [2020-12-23 09:22:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-23 09:22:11,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:11,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2020-12-23 09:22:11,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105143569] [2020-12-23 09:22:11,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 09:22:11,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 09:22:11,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 09:22:11,401 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 43 states. [2020-12-23 09:22:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:14,271 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-12-23 09:22:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 09:22:14,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2020-12-23 09:22:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:14,274 INFO L225 Difference]: With dead ends: 123 [2020-12-23 09:22:14,274 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 09:22:14,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=228, Invalid=5624, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 09:22:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 09:22:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2020-12-23 09:22:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 09:22:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-23 09:22:14,282 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2020-12-23 09:22:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:14,283 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-23 09:22:14,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 09:22:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-23 09:22:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 09:22:14,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:14,284 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:14,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:14,499 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2020-12-23 09:22:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256432035] [2020-12-23 09:22:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:15,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:16,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-23 09:22:16,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256432035] [2020-12-23 09:22:16,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337243494] [2020-12-23 09:22:16,385 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 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 09:22:16,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:22:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 152 conjunts are in the unsatisfiable core [2020-12-23 09:22:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-23 09:22:17,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:17,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 44 [2020-12-23 09:22:17,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302418304] [2020-12-23 09:22:17,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 09:22:17,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 09:22:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 09:22:17,025 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 44 states. [2020-12-23 09:22:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:20,236 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-12-23 09:22:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 09:22:20,236 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 131 [2020-12-23 09:22:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:20,238 INFO L225 Difference]: With dead ends: 129 [2020-12-23 09:22:20,238 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 09:22:20,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 09:22:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 09:22:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2020-12-23 09:22:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 09:22:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-12-23 09:22:20,247 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2020-12-23 09:22:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:20,247 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-12-23 09:22:20,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 09:22:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-12-23 09:22:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 09:22:20,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:20,250 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:20,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:20,459 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:20,459 INFO L82 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2020-12-23 09:22:20,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:20,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275269052] [2020-12-23 09:22:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:20,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:20,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:20,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:20,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:20,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:21,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:22,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:22,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:22,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-23 09:22:22,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275269052] [2020-12-23 09:22:22,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268725738] [2020-12-23 09:22:22,697 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:22,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:22:22,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:22,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 160 conjunts are in the unsatisfiable core [2020-12-23 09:22:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-23 09:22:23,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:23,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2020-12-23 09:22:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203055248] [2020-12-23 09:22:23,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 09:22:23,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 09:22:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 09:22:23,411 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 47 states. [2020-12-23 09:22:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:26,828 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-12-23 09:22:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 09:22:26,829 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-12-23 09:22:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:26,831 INFO L225 Difference]: With dead ends: 135 [2020-12-23 09:22:26,831 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 09:22:26,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=252, Invalid=6888, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 09:22:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 09:22:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2020-12-23 09:22:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 09:22:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-23 09:22:26,838 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2020-12-23 09:22:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:26,838 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-23 09:22:26,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 09:22:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-23 09:22:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 09:22:26,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:26,840 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:27,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 09:22:27,054 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:27,055 INFO L82 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2020-12-23 09:22:27,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:27,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604321157] [2020-12-23 09:22:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:28,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:29,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:29,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-23 09:22:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604321157] [2020-12-23 09:22:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177328801] [2020-12-23 09:22:29,626 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:29,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:22:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 168 conjunts are in the unsatisfiable core [2020-12-23 09:22:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-23 09:22:30,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:30,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2020-12-23 09:22:30,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032204090] [2020-12-23 09:22:30,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 09:22:30,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:30,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 09:22:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 09:22:30,216 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 48 states. [2020-12-23 09:22:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:34,104 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-12-23 09:22:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 09:22:34,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 145 [2020-12-23 09:22:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:34,106 INFO L225 Difference]: With dead ends: 141 [2020-12-23 09:22:34,106 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 09:22:34,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=258, Invalid=7398, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 09:22:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 09:22:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2020-12-23 09:22:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 09:22:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-23 09:22:34,113 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2020-12-23 09:22:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:34,114 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-23 09:22:34,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 09:22:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-23 09:22:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 09:22:34,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:34,115 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:34,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 09:22:34,330 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2020-12-23 09:22:34,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:34,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729772168] [2020-12-23 09:22:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:34,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:36,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:36,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:36,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:36,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-23 09:22:37,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729772168] [2020-12-23 09:22:37,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866775945] [2020-12-23 09:22:37,082 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:37,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:22:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:37,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 176 conjunts are in the unsatisfiable core [2020-12-23 09:22:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-23 09:22:37,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:37,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2020-12-23 09:22:37,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554054331] [2020-12-23 09:22:37,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 09:22:37,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:37,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 09:22:37,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 09:22:37,884 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 51 states. [2020-12-23 09:22:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:42,087 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2020-12-23 09:22:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 09:22:42,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 152 [2020-12-23 09:22:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:42,089 INFO L225 Difference]: With dead ends: 147 [2020-12-23 09:22:42,089 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 09:22:42,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=276, Invalid=8280, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 09:22:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 09:22:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2020-12-23 09:22:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 09:22:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-12-23 09:22:42,096 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2020-12-23 09:22:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:42,097 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-12-23 09:22:42,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 09:22:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-12-23 09:22:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-23 09:22:42,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:42,098 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:42,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 09:22:42,300 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2020-12-23 09:22:42,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:42,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002442931] [2020-12-23 09:22:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:42,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:43,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:44,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:44,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:44,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:44,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:44,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-12-23 09:22:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002442931] [2020-12-23 09:22:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088055198] [2020-12-23 09:22:45,142 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:45,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:22:45,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:45,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 184 conjunts are in the unsatisfiable core [2020-12-23 09:22:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-12-23 09:22:45,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:45,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 52 [2020-12-23 09:22:45,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120129850] [2020-12-23 09:22:45,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 09:22:45,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 09:22:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 09:22:45,847 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 52 states. [2020-12-23 09:22:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:22:50,586 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-12-23 09:22:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 09:22:50,587 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 159 [2020-12-23 09:22:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:22:50,588 INFO L225 Difference]: With dead ends: 153 [2020-12-23 09:22:50,588 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 09:22:50,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 09:22:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 09:22:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2020-12-23 09:22:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 09:22:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-23 09:22:50,595 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2020-12-23 09:22:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:22:50,595 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-23 09:22:50,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 09:22:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-23 09:22:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 09:22:50,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:22:50,596 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:22:50,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 09:22:50,803 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:22:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:22:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2020-12-23 09:22:50,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:22:50,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450595716] [2020-12-23 09:22:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:22:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:50,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:53,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:53,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:53,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:53,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:22:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:22:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-23 09:22:54,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450595716] [2020-12-23 09:22:54,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187166082] [2020-12-23 09:22:54,395 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:22:54,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:22:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:22:54,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 192 conjunts are in the unsatisfiable core [2020-12-23 09:22:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:22:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-23 09:22:55,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:22:55,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2020-12-23 09:22:55,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556104844] [2020-12-23 09:22:55,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 09:22:55,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:22:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 09:22:55,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 09:22:55,334 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 55 states. [2020-12-23 09:23:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:23:00,330 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-12-23 09:23:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 09:23:00,331 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 166 [2020-12-23 09:23:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:23:00,333 INFO L225 Difference]: With dead ends: 159 [2020-12-23 09:23:00,334 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 09:23:00,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=300, Invalid=9800, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 09:23:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 09:23:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2020-12-23 09:23:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 09:23:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-23 09:23:00,342 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2020-12-23 09:23:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:23:00,343 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-23 09:23:00,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 09:23:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-23 09:23:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 09:23:00,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:23:00,344 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:23:00,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 09:23:00,560 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:23:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:23:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2020-12-23 09:23:00,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:23:00,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064035040] [2020-12-23 09:23:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:23:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:00,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:00,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:00,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:00,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:00,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:01,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:02,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:02,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:02,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:02,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:03,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:03,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:03,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-12-23 09:23:04,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064035040] [2020-12-23 09:23:04,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450929650] [2020-12-23 09:23:04,023 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:04,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:23:04,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:23:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 200 conjunts are in the unsatisfiable core [2020-12-23 09:23:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:23:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-12-23 09:23:04,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:23:04,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 57 [2020-12-23 09:23:04,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769999683] [2020-12-23 09:23:04,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 09:23:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:23:04,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 09:23:04,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3075, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 09:23:04,842 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 57 states. [2020-12-23 09:23:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:23:10,371 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-12-23 09:23:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 09:23:10,371 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 173 [2020-12-23 09:23:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:23:10,373 INFO L225 Difference]: With dead ends: 165 [2020-12-23 09:23:10,374 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 09:23:10,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=311, Invalid=10609, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 09:23:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 09:23:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2020-12-23 09:23:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 09:23:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-12-23 09:23:10,380 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2020-12-23 09:23:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:23:10,381 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-12-23 09:23:10,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 09:23:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-12-23 09:23:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 09:23:10,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:23:10,382 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:23:10,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:10,597 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:23:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:23:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2020-12-23 09:23:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:23:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726514720] [2020-12-23 09:23:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:23:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:10,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:10,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:11,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:12,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:13,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:13,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:13,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:13,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:13,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-12-23 09:23:14,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726514720] [2020-12-23 09:23:14,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924149474] [2020-12-23 09:23:14,425 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:14,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:23:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:23:14,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 208 conjunts are in the unsatisfiable core [2020-12-23 09:23:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:23:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-12-23 09:23:15,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:23:15,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2020-12-23 09:23:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273338121] [2020-12-23 09:23:15,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 09:23:15,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:23:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 09:23:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 09:23:15,428 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 59 states. [2020-12-23 09:23:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:23:21,397 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2020-12-23 09:23:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 09:23:21,400 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 180 [2020-12-23 09:23:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:23:21,402 INFO L225 Difference]: With dead ends: 171 [2020-12-23 09:23:21,402 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 09:23:21,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=324, Invalid=11448, Unknown=0, NotChecked=0, Total=11772 [2020-12-23 09:23:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 09:23:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2020-12-23 09:23:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 09:23:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-23 09:23:21,412 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2020-12-23 09:23:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:23:21,413 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-23 09:23:21,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 09:23:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-23 09:23:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-23 09:23:21,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:23:21,414 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:23:21,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 09:23:21,631 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:23:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:23:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2020-12-23 09:23:21,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:23:21,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587308323] [2020-12-23 09:23:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:23:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:21,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:21,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:21,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:21,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:22,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:23,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:24,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:24,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:24,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:24,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:24,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-12-23 09:23:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587308323] [2020-12-23 09:23:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420575182] [2020-12-23 09:23:25,486 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:25,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:23:25,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:23:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 216 conjunts are in the unsatisfiable core [2020-12-23 09:23:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:23:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-12-23 09:23:26,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:23:26,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 60 [2020-12-23 09:23:26,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294322070] [2020-12-23 09:23:26,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 09:23:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:23:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 09:23:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3419, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 09:23:26,330 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 60 states. [2020-12-23 09:23:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:23:32,705 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-12-23 09:23:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 09:23:32,705 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 187 [2020-12-23 09:23:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:23:32,707 INFO L225 Difference]: With dead ends: 177 [2020-12-23 09:23:32,707 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 09:23:32,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=330, Invalid=12102, Unknown=0, NotChecked=0, Total=12432 [2020-12-23 09:23:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 09:23:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2020-12-23 09:23:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 09:23:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-23 09:23:32,714 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 187 [2020-12-23 09:23:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:23:32,715 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-23 09:23:32,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 09:23:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-23 09:23:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 09:23:32,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:23:32,716 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:23:32,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 09:23:32,931 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:23:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:23:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1664905904, now seen corresponding path program 13 times [2020-12-23 09:23:32,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:23:32,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113074315] [2020-12-23 09:23:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:23:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:33,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:34,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:35,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:35,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:35,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:35,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:35,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:35,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:36,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:36,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:36,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:36,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-23 09:23:37,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113074315] [2020-12-23 09:23:37,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306783074] [2020-12-23 09:23:37,412 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:37,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 224 conjunts are in the unsatisfiable core [2020-12-23 09:23:37,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:23:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-23 09:23:38,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:23:38,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2020-12-23 09:23:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925542826] [2020-12-23 09:23:38,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 09:23:38,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:23:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 09:23:38,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 09:23:38,446 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 63 states. [2020-12-23 09:23:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:23:45,265 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-12-23 09:23:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 09:23:45,266 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 194 [2020-12-23 09:23:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:23:45,267 INFO L225 Difference]: With dead ends: 183 [2020-12-23 09:23:45,268 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 09:23:45,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=348, Invalid=13224, Unknown=0, NotChecked=0, Total=13572 [2020-12-23 09:23:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 09:23:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2020-12-23 09:23:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 09:23:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-23 09:23:45,273 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 194 [2020-12-23 09:23:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:23:45,274 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-23 09:23:45,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 09:23:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-23 09:23:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 09:23:45,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:23:45,275 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:23:45,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:45,483 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:23:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:23:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1458999816, now seen corresponding path program 13 times [2020-12-23 09:23:45,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:23:45,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160300058] [2020-12-23 09:23:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:23:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:45,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:45,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:45,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:45,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:45,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:46,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:47,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:47,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:47,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:47,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:48,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:48,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:48,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:48,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:49,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:49,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:49,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 09:23:50,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160300058] [2020-12-23 09:23:50,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703625588] [2020-12-23 09:23:50,078 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:50,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 232 conjunts are in the unsatisfiable core [2020-12-23 09:23:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:23:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-23 09:23:50,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:23:50,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62] total 64 [2020-12-23 09:23:50,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244706549] [2020-12-23 09:23:50,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 09:23:50,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:23:50,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 09:23:50,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3903, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 09:23:50,932 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 64 states. [2020-12-23 09:23:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:23:58,478 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-12-23 09:23:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 09:23:58,479 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 201 [2020-12-23 09:23:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:23:58,481 INFO L225 Difference]: With dead ends: 189 [2020-12-23 09:23:58,481 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 09:23:58,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=354, Invalid=13926, Unknown=0, NotChecked=0, Total=14280 [2020-12-23 09:23:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 09:23:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 105. [2020-12-23 09:23:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 09:23:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-12-23 09:23:58,489 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 201 [2020-12-23 09:23:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:23:58,489 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-12-23 09:23:58,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 09:23:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-12-23 09:23:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-23 09:23:58,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:23:58,491 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:23:58,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:23:58,706 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:23:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:23:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash -941688870, now seen corresponding path program 14 times [2020-12-23 09:23:58,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:23:58,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261682725] [2020-12-23 09:23:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:23:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:58,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:58,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:23:59,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:23:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:00,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:01,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:01,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:01,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:01,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:01,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:01,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:02,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:02,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:02,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:03,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-23 09:24:03,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261682725] [2020-12-23 09:24:03,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154579480] [2020-12-23 09:24:03,816 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:24:03,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:24:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:24:03,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 240 conjunts are in the unsatisfiable core [2020-12-23 09:24:03,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:24:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-23 09:24:04,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:24:04,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2020-12-23 09:24:04,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558984410] [2020-12-23 09:24:04,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 09:24:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:24:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 09:24:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 09:24:04,941 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 67 states. [2020-12-23 09:24:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:24:12,891 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2020-12-23 09:24:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 09:24:12,892 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 208 [2020-12-23 09:24:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:24:12,895 INFO L225 Difference]: With dead ends: 195 [2020-12-23 09:24:12,895 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 09:24:12,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 260 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=372, Invalid=15128, Unknown=0, NotChecked=0, Total=15500 [2020-12-23 09:24:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 09:24:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2020-12-23 09:24:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 09:24:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-23 09:24:12,903 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 208 [2020-12-23 09:24:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:24:12,903 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-23 09:24:12,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 09:24:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-23 09:24:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-23 09:24:12,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:24:12,905 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:24:13,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 09:24:13,120 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:24:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:24:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 482690706, now seen corresponding path program 14 times [2020-12-23 09:24:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:24:13,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938229457] [2020-12-23 09:24:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:24:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:13,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:14,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:15,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:15,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:15,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:15,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:15,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:16,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:16,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:16,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:17,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:17,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:17,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:18,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-12-23 09:24:19,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938229457] [2020-12-23 09:24:19,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744917549] [2020-12-23 09:24:19,006 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:24:19,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:24:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:24:19,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 248 conjunts are in the unsatisfiable core [2020-12-23 09:24:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:24:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-12-23 09:24:20,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:24:20,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 69 [2020-12-23 09:24:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146559264] [2020-12-23 09:24:20,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 09:24:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:24:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 09:24:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4551, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 09:24:20,075 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 69 states. [2020-12-23 09:24:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:24:29,563 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2020-12-23 09:24:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 09:24:29,563 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 215 [2020-12-23 09:24:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:24:29,565 INFO L225 Difference]: With dead ends: 201 [2020-12-23 09:24:29,566 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 09:24:29,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=383, Invalid=16129, Unknown=0, NotChecked=0, Total=16512 [2020-12-23 09:24:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 09:24:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2020-12-23 09:24:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 09:24:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-12-23 09:24:29,575 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 215 [2020-12-23 09:24:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:24:29,575 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-12-23 09:24:29,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 09:24:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-12-23 09:24:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 09:24:29,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:24:29,577 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:24:29,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:24:29,792 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:24:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:24:29,792 INFO L82 PathProgramCache]: Analyzing trace with hash 837482372, now seen corresponding path program 15 times [2020-12-23 09:24:29,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:24:29,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818101921] [2020-12-23 09:24:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:24:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:29,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:30,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:31,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:31,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:31,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:31,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:31,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:32,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:32,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:32,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:32,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:32,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:33,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:33,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:33,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:33,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:34,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:34,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:35,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-12-23 09:24:36,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818101921] [2020-12-23 09:24:36,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952447311] [2020-12-23 09:24:36,025 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:24:36,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:24:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:24:36,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 256 conjunts are in the unsatisfiable core [2020-12-23 09:24:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:24:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-12-23 09:24:37,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:24:37,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2020-12-23 09:24:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129514526] [2020-12-23 09:24:37,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 09:24:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:24:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 09:24:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 09:24:37,393 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 71 states. [2020-12-23 09:24:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:24:47,155 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-12-23 09:24:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 09:24:47,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 222 [2020-12-23 09:24:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:24:47,160 INFO L225 Difference]: With dead ends: 207 [2020-12-23 09:24:47,161 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 09:24:47,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 278 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=396, Invalid=17160, Unknown=0, NotChecked=0, Total=17556 [2020-12-23 09:24:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 09:24:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 114. [2020-12-23 09:24:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 09:24:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-23 09:24:47,169 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 222 [2020-12-23 09:24:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:24:47,170 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-23 09:24:47,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 09:24:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-23 09:24:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-23 09:24:47,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:24:47,171 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:24:47,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 09:24:47,386 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:24:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:24:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1020068268, now seen corresponding path program 15 times [2020-12-23 09:24:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:24:47,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506526044] [2020-12-23 09:24:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:24:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:47,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:47,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:47,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:47,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:49,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:49,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:49,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:49,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:50,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:50,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:50,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:50,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:50,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:51,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:51,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:51,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:51,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:52,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:52,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:52,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:52,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 09:24:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:24:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-12-23 09:24:53,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506526044] [2020-12-23 09:24:53,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546211776] [2020-12-23 09:24:53,904 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:24:54,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:24:54,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:24:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 200 conjunts are in the unsatisfiable core [2020-12-23 09:24:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:25:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-12-23 09:25:05,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:25:05,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135 [2020-12-23 09:25:05,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170498296] [2020-12-23 09:25:05,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 135 states [2020-12-23 09:25:05,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:25:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2020-12-23 09:25:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=17758, Unknown=0, NotChecked=0, Total=18090 [2020-12-23 09:25:05,106 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 135 states.