/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/iftelse.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:01:38,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:01:38,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:01:38,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:01:38,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:01:38,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:01:38,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:01:38,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:01:38,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:01:38,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:01:38,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:01:38,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:01:38,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:01:38,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:01:38,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:01:38,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:01:38,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:01:38,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:01:38,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:01:38,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:01:38,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:01:38,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:01:38,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:01:38,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:01:38,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:01:38,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:01:38,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:01:38,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:01:38,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:01:38,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:01:38,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:01:38,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:01:38,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:01:38,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:01:38,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:01:38,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:01:38,593 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 07:01:38,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:01:38,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:01:38,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:01:38,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:01:38,648 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:01:38,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:01:38,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:01:38,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:01:38,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:01:38,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:01:38,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:01:38,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:01:38,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:01:38,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:01:38,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:01:38,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:01:38,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:01:38,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:01:38,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:01:38,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:01:38,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:01:38,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:01:38,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:01:38,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:01:38,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:01:38,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:01:39,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:01:39,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:01:39,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:01:39,062 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:01:39,063 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:01:39,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/iftelse.c [2020-12-23 07:01:39,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66da4715d/000951a91d0640aea7f6a2fb2421f5b3/FLAG592600c14 [2020-12-23 07:01:39,822 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:01:39,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c [2020-12-23 07:01:39,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66da4715d/000951a91d0640aea7f6a2fb2421f5b3/FLAG592600c14 [2020-12-23 07:01:40,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66da4715d/000951a91d0640aea7f6a2fb2421f5b3 [2020-12-23 07:01:40,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:01:40,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:01:40,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:01:40,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:01:40,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:01:40,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3989d818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40, skipping insertion in model container [2020-12-23 07:01:40,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:01:40,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:01:40,478 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2020-12-23 07:01:40,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:01:40,509 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:01:40,524 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2020-12-23 07:01:40,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:01:40,547 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:01:40,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40 WrapperNode [2020-12-23 07:01:40,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:01:40,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:01:40,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:01:40,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:01:40,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:01:40,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:01:40,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:01:40,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:01:40,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (1/1) ... [2020-12-23 07:01:40,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:01:40,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:01:40,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:01:40,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:01:40,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (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 07:01:40,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:01:40,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:01:40,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:01:40,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:01:41,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:01:41,009 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:01:41,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:01:41 BoogieIcfgContainer [2020-12-23 07:01:41,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:01:41,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:01:41,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:01:41,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:01:41,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:01:40" (1/3) ... [2020-12-23 07:01:41,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378704b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:01:41, skipping insertion in model container [2020-12-23 07:01:41,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:40" (2/3) ... [2020-12-23 07:01:41,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378704b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:01:41, skipping insertion in model container [2020-12-23 07:01:41,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:01:41" (3/3) ... [2020-12-23 07:01:41,022 INFO L111 eAbstractionObserver]: Analyzing ICFG iftelse.c [2020-12-23 07:01:41,030 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:01:41,036 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:01:41,126 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:01:41,188 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:01:41,188 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:01:41,188 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:01:41,188 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:01:41,189 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:01:41,189 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:01:41,189 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:01:41,189 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:01:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 07:01:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:01:41,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:41,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:41,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:41,230 INFO L82 PathProgramCache]: Analyzing trace with hash 183324244, now seen corresponding path program 1 times [2020-12-23 07:01:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:41,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256635641] [2020-12-23 07:01:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:41,956 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 07:01:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256635641] [2020-12-23 07:01:41,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:01:41,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:01:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374502874] [2020-12-23 07:01:41,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:01:41,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:01:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:01:41,985 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-12-23 07:01:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:42,216 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-12-23 07:01:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:01:42,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 07:01:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:42,229 INFO L225 Difference]: With dead ends: 48 [2020-12-23 07:01:42,229 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:01:42,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:01:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:01:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2020-12-23 07:01:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 07:01:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-23 07:01:42,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2020-12-23 07:01:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:42,284 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-23 07:01:42,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:01:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-23 07:01:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:01:42,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:42,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:42,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:01:42,286 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1453682726, now seen corresponding path program 1 times [2020-12-23 07:01:42,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:42,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307905619] [2020-12-23 07:01:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:42,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307905619] [2020-12-23 07:01:42,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:01:42,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:01:42,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187962900] [2020-12-23 07:01:42,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:01:42,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:01:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:01:42,344 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-12-23 07:01:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:42,361 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2020-12-23 07:01:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:01:42,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 07:01:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:42,364 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:01:42,364 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 07:01:42,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:01:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 07:01:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 07:01:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 07:01:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 07:01:42,369 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-12-23 07:01:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:42,370 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 07:01:42,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:01:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 07:01:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:01:42,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:42,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:42,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:01:42,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash 604109513, now seen corresponding path program 1 times [2020-12-23 07:01:42,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:42,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649652257] [2020-12-23 07:01:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:42,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649652257] [2020-12-23 07:01:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656936590] [2020-12-23 07:01:42,531 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 07:01:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:42,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:01:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:42,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:42,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:01:42,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651853422] [2020-12-23 07:01:42,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:01:42,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:01:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:01:42,770 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2020-12-23 07:01:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:42,829 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-23 07:01:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:01:42,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 07:01:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:42,831 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:01:42,831 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:01:42,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:01:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:01:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2020-12-23 07:01:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:01:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 07:01:42,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-23 07:01:42,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:42,837 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 07:01:42,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:01:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 07:01:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:01:42,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:42,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:43,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 07:01:43,055 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:43,056 INFO L82 PathProgramCache]: Analyzing trace with hash 604169095, now seen corresponding path program 1 times [2020-12-23 07:01:43,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:43,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470463070] [2020-12-23 07:01:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:43,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470463070] [2020-12-23 07:01:43,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136035457] [2020-12-23 07:01:43,351 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 07:01:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:01:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:43,651 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:43,698 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:01:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:43,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:43,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2020-12-23 07:01:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368214889] [2020-12-23 07:01:43,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:01:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:01:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:01:43,746 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2020-12-23 07:01:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:43,871 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-23 07:01:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:01:43,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-12-23 07:01:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:43,872 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:01:43,872 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:01:43,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:01:43,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:01:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-23 07:01:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:01:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 07:01:43,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-12-23 07:01:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:43,878 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 07:01:43,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:01:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 07:01:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:01:43,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:43,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:44,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:44,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:44,095 INFO L82 PathProgramCache]: Analyzing trace with hash -518799748, now seen corresponding path program 2 times [2020-12-23 07:01:44,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:44,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164529633] [2020-12-23 07:01:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:44,577 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-12-23 07:01:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:44,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164529633] [2020-12-23 07:01:44,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058869954] [2020-12-23 07:01:44,626 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 07:01:44,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:01:44,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:45,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:45,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:01:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:45,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:45,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2020-12-23 07:01:45,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861797466] [2020-12-23 07:01:45,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:01:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:01:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:01:45,076 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2020-12-23 07:01:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:45,295 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-23 07:01:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:01:45,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 07:01:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:45,298 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:01:45,298 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:01:45,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:01:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:01:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-12-23 07:01:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:01:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 07:01:45,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-12-23 07:01:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:45,307 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 07:01:45,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:01:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 07:01:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:01:45,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:45,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:45,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:45,518 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1549527311, now seen corresponding path program 3 times [2020-12-23 07:01:45,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:45,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807230519] [2020-12-23 07:01:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:45,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807230519] [2020-12-23 07:01:45,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520646578] [2020-12-23 07:01:45,697 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 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 07:01:45,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:01:45,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:01:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:01:45,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:01:45,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-23 07:01:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432962922] [2020-12-23 07:01:45,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:01:45,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:01:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:01:45,856 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-12-23 07:01:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:45,881 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 07:01:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:01:45,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 07:01:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:45,883 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:01:45,883 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:01:45,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:01:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:01:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-23 07:01:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:01:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 07:01:45,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-12-23 07:01:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:45,889 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 07:01:45,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:01:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 07:01:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:01:45,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:45,891 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 07:01:46,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:46,104 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1549467729, now seen corresponding path program 4 times [2020-12-23 07:01:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:46,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692776281] [2020-12-23 07:01:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:46,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692776281] [2020-12-23 07:01:46,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122601154] [2020-12-23 07:01:46,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:46,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:01:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:46,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:46,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:01:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:46,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:46,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2020-12-23 07:01:46,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986665693] [2020-12-23 07:01:46,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:01:46,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:01:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:01:46,822 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 14 states. [2020-12-23 07:01:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:47,101 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 07:01:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:01:47,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-23 07:01:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:47,105 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:01:47,105 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:01:47,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:01:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:01:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-23 07:01:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:01:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-23 07:01:47,119 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2020-12-23 07:01:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:47,119 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-23 07:01:47,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:01:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-23 07:01:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:01:47,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:47,123 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1] [2020-12-23 07:01:47,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 07:01:47,338 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1283163812, now seen corresponding path program 5 times [2020-12-23 07:01:47,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:47,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127772423] [2020-12-23 07:01:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:47,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127772423] [2020-12-23 07:01:47,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728764451] [2020-12-23 07:01:47,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:48,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:01:48,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:01:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:48,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:48,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:01:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:48,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:48,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2020-12-23 07:01:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623739514] [2020-12-23 07:01:48,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:01:48,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:01:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:01:48,409 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-12-23 07:01:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:48,742 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-23 07:01:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:01:48,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-23 07:01:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:48,751 INFO L225 Difference]: With dead ends: 38 [2020-12-23 07:01:48,751 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 07:01:48,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:01:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 07:01:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 07:01:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:01:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 07:01:48,767 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-12-23 07:01:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:48,767 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 07:01:48,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:01:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 07:01:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:01:48,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:48,769 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 1, 1, 1, 1, 1] [2020-12-23 07:01:48,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:48,975 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash 136082391, now seen corresponding path program 6 times [2020-12-23 07:01:48,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:48,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50693020] [2020-12-23 07:01:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:49,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50693020] [2020-12-23 07:01:49,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071150392] [2020-12-23 07:01:49,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:50,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:01:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:01:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:51,109 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-23 07:01:51,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 07:01:51,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 07:01:54,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts