/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/sum_natnum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:10:51,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:10:51,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:10:51,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:10:51,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:10:51,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:10:51,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:10:51,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:10:51,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:10:51,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:10:51,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:10:51,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:10:51,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:10:51,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:10:51,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:10:51,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:10:51,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:10:51,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:10:51,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:10:51,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:10:51,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:10:51,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:10:51,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:10:51,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:10:51,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:10:51,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:10:51,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:10:51,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:10:51,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:10:51,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:10:51,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:10:51,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:10:51,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:10:51,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:10:51,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:10:51,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:10:51,754 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 07:10:51,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:10:51,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:10:51,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:10:51,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:10:51,783 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:10:51,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:10:51,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:10:51,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:10:51,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:10:51,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:10:51,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:10:51,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:10:51,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:10:51,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:10:51,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:10:51,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:10:51,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:10:51,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:10:51,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:10:51,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:10:51,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:10:51,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:10:51,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:10:51,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:10:51,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:10:51,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:10:52,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:10:52,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:10:52,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:10:52,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:10:52,205 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:10:52,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2020-12-23 07:10:52,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7f6fd5294/68b0be2f688d49b1bdea74d6ca623d51/FLAG667a72bcb [2020-12-23 07:10:52,854 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:10:52,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2020-12-23 07:10:52,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7f6fd5294/68b0be2f688d49b1bdea74d6ca623d51/FLAG667a72bcb [2020-12-23 07:10:53,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7f6fd5294/68b0be2f688d49b1bdea74d6ca623d51 [2020-12-23 07:10:53,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:10:53,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:10:53,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:10:53,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:10:53,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:10:53,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5db945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53, skipping insertion in model container [2020-12-23 07:10:53,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:10:53,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:10:53,443 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/sum_natnum.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 07:10:53,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:10:53,467 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:10:53,482 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/sum_natnum.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 07:10:53,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:10:53,502 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:10:53,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53 WrapperNode [2020-12-23 07:10:53,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:10:53,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:10:53,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:10:53,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:10:53,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:10:53,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:10:53,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:10:53,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:10:53,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (1/1) ... [2020-12-23 07:10:53,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:10:53,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:10:53,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:10:53,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:10:53,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (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 07:10:53,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:10:53,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:10:53,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:10:53,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:10:55,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:10:55,909 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:10:55,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:10:55 BoogieIcfgContainer [2020-12-23 07:10:55,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:10:55,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:10:55,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:10:55,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:10:55,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:10:53" (1/3) ... [2020-12-23 07:10:55,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efb2ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:10:55, skipping insertion in model container [2020-12-23 07:10:55,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:10:53" (2/3) ... [2020-12-23 07:10:55,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efb2ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:10:55, skipping insertion in model container [2020-12-23 07:10:55,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:10:55" (3/3) ... [2020-12-23 07:10:55,921 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2020-12-23 07:10:55,928 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:10:55,932 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:10:55,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:10:55,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:10:55,983 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:10:55,983 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:10:55,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:10:55,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:10:55,983 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:10:55,983 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:10:55,983 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:10:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-23 07:10:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:10:56,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:56,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:10:56,023 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 07:10:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:56,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842491893] [2020-12-23 07:10:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:56,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:10:56,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359990147] [2020-12-23 07:10:56,162 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 07:10:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:10:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:56,340 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 07:10:56,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842491893] [2020-12-23 07:10:56,341 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:10:56,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359990147] [2020-12-23 07:10:56,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:10:56,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:10:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388636123] [2020-12-23 07:10:56,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:10:56,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:56,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:10:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:10:56,366 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-23 07:10:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:58,462 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-23 07:10:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:10:58,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:10:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:58,474 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:10:58,474 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 07:10:58,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:10:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 07:10:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 07:10:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 07:10:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 07:10:58,505 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 07:10:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:58,505 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 07:10:58,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:10:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 07:10:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:10:58,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:58,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:58,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 07:10:58,722 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:58,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 07:10:58,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:58,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780563816] [2020-12-23 07:10:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:58,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:10:58,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197497498] [2020-12-23 07:10:58,743 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 07:10:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:10:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:10:58,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780563816] [2020-12-23 07:10:58,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:10:58,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197497498] [2020-12-23 07:10:58,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:10:58,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:10:58,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586677195] [2020-12-23 07:10:58,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:10:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:10:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:10:58,912 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 07:11:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:00,948 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 07:11:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:11:00,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 07:11:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:00,958 INFO L225 Difference]: With dead ends: 13 [2020-12-23 07:11:00,958 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 07:11:00,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:11:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 07:11:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 07:11:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 07:11:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 07:11:00,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 07:11:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:00,963 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 07:11:00,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:11:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 07:11:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:11:00,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:00,964 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:01,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:01,165 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:01,168 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-23 07:11:01,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:01,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433627780] [2020-12-23 07:11:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:01,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:01,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683995337] [2020-12-23 07:11:01,192 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 07:11:01,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:11:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:01,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433627780] [2020-12-23 07:11:01,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:01,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683995337] [2020-12-23 07:11:01,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:01,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:11:01,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877340271] [2020-12-23 07:11:01,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:11:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:11:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:11:01,376 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-23 07:11:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:03,408 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-23 07:11:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:11:03,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 07:11:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:03,415 INFO L225 Difference]: With dead ends: 14 [2020-12-23 07:11:03,416 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 07:11:03,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:11:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 07:11:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 07:11:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 07:11:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 07:11:03,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 07:11:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:03,420 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 07:11:03,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:11:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 07:11:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:11:03,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:03,422 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:03,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:03,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-23 07:11:03,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:03,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827813743] [2020-12-23 07:11:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:03,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:03,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830041255] [2020-12-23 07:11:03,671 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 07:11:03,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:11:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:11:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:03,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827813743] [2020-12-23 07:11:03,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:03,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830041255] [2020-12-23 07:11:03,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:03,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:11:03,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437466772] [2020-12-23 07:11:03,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:11:03,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:03,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:11:03,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:11:03,817 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-23 07:11:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:05,845 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 07:11:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:11:05,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 07:11:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:05,857 INFO L225 Difference]: With dead ends: 15 [2020-12-23 07:11:05,857 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 07:11:05,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:11:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 07:11:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 07:11:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 07:11:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 07:11:05,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-23 07:11:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:05,862 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 07:11:05,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:11:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 07:11:05,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:11:05,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:05,863 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:06,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:06,065 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-23 07:11:06,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:06,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50133995] [2020-12-23 07:11:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:06,087 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:06,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124019423] [2020-12-23 07:11:06,088 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 07:11:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:11:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:06,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50133995] [2020-12-23 07:11:06,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:06,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124019423] [2020-12-23 07:11:06,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:06,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:11:06,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19493456] [2020-12-23 07:11:06,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:11:06,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:11:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:11:06,331 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-23 07:11:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:08,358 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 07:11:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:11:08,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 07:11:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:08,366 INFO L225 Difference]: With dead ends: 16 [2020-12-23 07:11:08,366 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:11:08,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:11:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:11:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:11:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:11:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 07:11:08,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-23 07:11:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:08,371 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 07:11:08,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:11:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 07:11:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:11:08,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:08,372 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:08,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:08,585 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-23 07:11:08,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:08,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200233027] [2020-12-23 07:11:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:08,614 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:08,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491594467] [2020-12-23 07:11:08,615 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 07:11:08,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:11:08,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:08,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:11:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:08,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200233027] [2020-12-23 07:11:08,767 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491594467] [2020-12-23 07:11:08,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:08,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:11:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862078849] [2020-12-23 07:11:08,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:11:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:11:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:11:08,769 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-23 07:11:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:10,803 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-23 07:11:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:11:10,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 07:11:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:10,815 INFO L225 Difference]: With dead ends: 17 [2020-12-23 07:11:10,815 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 07:11:10,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:11:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 07:11:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 07:11:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 07:11:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 07:11:10,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-23 07:11:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:10,820 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 07:11:10,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:11:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 07:11:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:11:10,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:10,821 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:11,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:11,024 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-12-23 07:11:11,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:11,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345042830] [2020-12-23 07:11:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:11,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:11,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26237886] [2020-12-23 07:11:11,042 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 07:11:11,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:11:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:11:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:11,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345042830] [2020-12-23 07:11:11,242 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26237886] [2020-12-23 07:11:11,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:11,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:11:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110320980] [2020-12-23 07:11:11,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:11:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:11:11,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:11:11,245 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-23 07:11:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:13,279 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 07:11:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:11:13,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-23 07:11:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:13,293 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:11:13,293 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:11:13,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:11:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:11:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 07:11:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:11:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 07:11:13,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-23 07:11:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 07:11:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:11:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 07:11:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:11:13,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:13,299 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:13,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:13,506 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2020-12-23 07:11:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:13,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145165661] [2020-12-23 07:11:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:13,530 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:13,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921347343] [2020-12-23 07:11:13,532 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 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 07:11:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:11:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:13,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145165661] [2020-12-23 07:11:13,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:13,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921347343] [2020-12-23 07:11:13,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:13,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:11:13,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816932259] [2020-12-23 07:11:13,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:11:13,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:11:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:11:13,748 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-23 07:11:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:19,131 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-23 07:11:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:11:19,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 07:11:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:19,137 INFO L225 Difference]: With dead ends: 19 [2020-12-23 07:11:19,137 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:11:19,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:11:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:11:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:11:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:11:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 07:11:19,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-23 07:11:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:19,142 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 07:11:19,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:11:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 07:11:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:11:19,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:19,144 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:19,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 07:11:19,354 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2020-12-23 07:11:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:19,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135604072] [2020-12-23 07:11:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:19,382 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:19,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956044813] [2020-12-23 07:11:19,383 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 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 07:11:19,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:11:19,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:19,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135604072] [2020-12-23 07:11:19,602 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:19,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956044813] [2020-12-23 07:11:19,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:11:19,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575073142] [2020-12-23 07:11:19,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:11:19,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:11:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:11:19,604 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-23 07:11:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:21,641 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 07:11:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:11:21,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 07:11:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:21,648 INFO L225 Difference]: With dead ends: 20 [2020-12-23 07:11:21,648 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:11:21,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:11:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:11:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:11:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:11:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 07:11:21,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-23 07:11:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:21,653 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 07:11:21,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:11:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 07:11:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:11:21,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:21,654 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:21,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:21,855 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2020-12-23 07:11:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:21,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243104900] [2020-12-23 07:11:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:21,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:21,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666168507] [2020-12-23 07:11:21,902 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 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 07:11:21,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:11:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:11:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:22,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243104900] [2020-12-23 07:11:22,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:22,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666168507] [2020-12-23 07:11:22,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:22,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:11:22,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492340648] [2020-12-23 07:11:22,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:11:22,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:11:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:11:22,190 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-23 07:11:26,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:26,648 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-23 07:11:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:11:26,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-23 07:11:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:26,652 INFO L225 Difference]: With dead ends: 21 [2020-12-23 07:11:26,653 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:11:26,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:11:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:11:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:11:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:11:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 07:11:26,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-23 07:11:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:26,657 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 07:11:26,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:11:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 07:11:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:11:26,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:26,658 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:26,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:26,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2020-12-23 07:11:26,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:26,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864805657] [2020-12-23 07:11:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:26,894 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:26,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025470776] [2020-12-23 07:11:26,898 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 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 07:11:26,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:11:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:27,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864805657] [2020-12-23 07:11:27,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:27,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025470776] [2020-12-23 07:11:27,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:27,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:11:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4644194] [2020-12-23 07:11:27,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:11:27,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:11:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:11:27,205 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-23 07:11:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:29,248 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 07:11:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:11:29,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-23 07:11:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:29,261 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:11:29,262 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:11:29,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:11:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:11:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 07:11:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:11:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 07:11:29,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-23 07:11:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:29,267 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 07:11:29,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:11:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 07:11:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:11:29,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:29,268 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:29,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 07:11:29,473 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2020-12-23 07:11:29,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:29,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460039836] [2020-12-23 07:11:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:29,489 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:29,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523526007] [2020-12-23 07:11:29,490 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 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 07:11:29,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:11:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:29,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:11:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:29,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460039836] [2020-12-23 07:11:29,802 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:29,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523526007] [2020-12-23 07:11:29,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:29,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 07:11:29,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041065118] [2020-12-23 07:11:29,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:11:29,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:29,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:11:29,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:11:29,804 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-23 07:11:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:31,852 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 07:11:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:11:31,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-23 07:11:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:31,861 INFO L225 Difference]: With dead ends: 23 [2020-12-23 07:11:31,861 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:11:31,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:11:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:11:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 07:11:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:11:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 07:11:31,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-23 07:11:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:31,866 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 07:11:31,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:11:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 07:11:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:11:31,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:31,867 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:32,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:32,078 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:32,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:32,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2020-12-23 07:11:32,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:32,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955749497] [2020-12-23 07:11:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:32,092 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:32,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617145481] [2020-12-23 07:11:32,093 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 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 07:11:32,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:11:32,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:32,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:11:32,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:32,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955749497] [2020-12-23 07:11:32,391 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:32,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617145481] [2020-12-23 07:11:32,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:32,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 07:11:32,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435994790] [2020-12-23 07:11:32,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:11:32,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:11:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:11:32,393 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2020-12-23 07:11:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:34,431 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 07:11:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:11:34,438 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 07:11:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:34,439 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:11:34,439 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:11:34,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:11:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:11:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 07:11:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:11:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 07:11:34,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 07:11:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:34,444 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 07:11:34,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:11:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 07:11:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:11:34,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:34,445 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:34,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:11:34,647 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2020-12-23 07:11:34,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:34,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915460901] [2020-12-23 07:11:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:34,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:34,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144121610] [2020-12-23 07:11:34,662 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 07:11:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:34,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:11:34,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915460901] [2020-12-23 07:11:34,980 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144121610] [2020-12-23 07:11:34,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:34,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 07:11:34,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549860073] [2020-12-23 07:11:34,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:11:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:34,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:11:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:11:34,982 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-23 07:11:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:37,032 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 07:11:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:11:37,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-23 07:11:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:37,059 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:11:37,059 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:11:37,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:11:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:11:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 07:11:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:11:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 07:11:37,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-23 07:11:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:37,064 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 07:11:37,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:11:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 07:11:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:11:37,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:37,065 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:37,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:37,266 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2020-12-23 07:11:37,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:37,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940447321] [2020-12-23 07:11:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:37,282 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:37,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617480129] [2020-12-23 07:11:37,283 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 07:11:37,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:11:37,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940447321] [2020-12-23 07:11:37,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617480129] [2020-12-23 07:11:37,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:37,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:11:37,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588240639] [2020-12-23 07:11:37,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:11:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:11:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:11:37,671 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-23 07:11:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:39,736 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 07:11:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:11:39,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-23 07:11:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:39,758 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:11:39,758 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:11:39,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:11:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:11:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:11:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:11:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 07:11:39,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-23 07:11:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:39,772 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 07:11:39,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:11:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 07:11:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:11:39,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:39,773 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:39,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:11:39,983 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2020-12-23 07:11:39,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:39,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821761400] [2020-12-23 07:11:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:39,996 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:39,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621335216] [2020-12-23 07:11:39,996 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 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 07:11:40,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 07:11:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:11:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821761400] [2020-12-23 07:11:40,396 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621335216] [2020-12-23 07:11:40,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:40,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 07:11:40,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607488136] [2020-12-23 07:11:40,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:11:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:11:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:11:40,398 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-23 07:11:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:42,449 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 07:11:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:11:42,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-23 07:11:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:42,468 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:11:42,468 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:11:42,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:11:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:11:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:11:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:11:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 07:11:42,472 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-23 07:11:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:42,473 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 07:11:42,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:11:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 07:11:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:11:42,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:42,474 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:42,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:11:42,682 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2020-12-23 07:11:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:42,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429745014] [2020-12-23 07:11:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:42,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:42,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291617851] [2020-12-23 07:11:42,697 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 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 07:11:42,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:42,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:11:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:43,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429745014] [2020-12-23 07:11:43,130 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:43,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291617851] [2020-12-23 07:11:43,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:43,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 07:11:43,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609441928] [2020-12-23 07:11:43,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:11:43,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:11:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:11:43,132 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-23 07:11:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:45,183 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:11:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:11:45,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-23 07:11:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:45,194 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:11:45,194 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:11:45,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:11:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:11:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:11:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:11:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:11:45,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-23 07:11:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:45,199 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:11:45,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:11:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:11:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:11:45,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:45,200 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:45,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:11:45,412 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2020-12-23 07:11:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:45,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457760562] [2020-12-23 07:11:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:45,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:45,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441287185] [2020-12-23 07:11:45,427 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 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 07:11:45,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 07:11:45,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:11:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:45,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457760562] [2020-12-23 07:11:45,898 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:45,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441287185] [2020-12-23 07:11:45,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:45,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 07:11:45,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229023450] [2020-12-23 07:11:45,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:11:45,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:11:45,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:11:45,908 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-23 07:11:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:47,961 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-23 07:11:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:11:47,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-23 07:11:47,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:47,967 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:11:47,967 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:11:47,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:11:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:11:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 07:11:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:11:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 07:11:47,971 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-23 07:11:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:47,971 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 07:11:47,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:11:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 07:11:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:11:47,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:47,972 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:48,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:11:48,175 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2020-12-23 07:11:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:48,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550117168] [2020-12-23 07:11:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:48,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:48,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435348156] [2020-12-23 07:11:48,200 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 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 07:11:48,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 07:11:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:11:48,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550117168] [2020-12-23 07:11:48,693 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:48,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435348156] [2020-12-23 07:11:48,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:48,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 07:11:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324329298] [2020-12-23 07:11:48,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:11:48,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:11:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:11:48,696 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-23 07:11:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:53,284 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 07:11:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:11:53,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-23 07:11:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:53,285 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:11:53,285 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 07:11:53,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:11:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 07:11:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 07:11:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:11:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 07:11:53,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-23 07:11:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:53,289 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 07:11:53,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:11:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 07:11:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:11:53,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:53,290 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:53,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:53,502 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2020-12-23 07:11:53,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:53,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963875793] [2020-12-23 07:11:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:53,515 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:53,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702295197] [2020-12-23 07:11:53,515 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 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 07:11:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:11:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:54,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963875793] [2020-12-23 07:11:54,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702295197] [2020-12-23 07:11:54,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:54,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-23 07:11:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882102634] [2020-12-23 07:11:54,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:11:54,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:54,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:11:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:11:54,039 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-23 07:11:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:57,528 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 07:11:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:11:57,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-23 07:11:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:57,531 INFO L225 Difference]: With dead ends: 31 [2020-12-23 07:11:57,531 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:11:57,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:11:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:11:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 07:11:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:11:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 07:11:57,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-23 07:11:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:57,535 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 07:11:57,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:11:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 07:11:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:11:57,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:57,536 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:57,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:57,740 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2020-12-23 07:11:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:57,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809756487] [2020-12-23 07:11:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:57,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:11:57,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144516122] [2020-12-23 07:11:57,752 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 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 07:11:57,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:11:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:11:58,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809756487] [2020-12-23 07:11:58,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:11:58,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144516122] [2020-12-23 07:11:58,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:11:58,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 07:11:58,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994200399] [2020-12-23 07:11:58,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:11:58,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:58,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:11:58,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:11:58,353 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-23 07:12:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:00,417 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 07:12:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:12:00,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-23 07:12:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:00,423 INFO L225 Difference]: With dead ends: 32 [2020-12-23 07:12:00,423 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:12:00,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:12:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:12:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 07:12:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:12:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 07:12:00,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-23 07:12:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:00,428 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 07:12:00,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:12:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 07:12:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:12:00,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:00,428 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:00,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:12:00,631 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2020-12-23 07:12:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:00,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660285135] [2020-12-23 07:12:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:00,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:00,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106176223] [2020-12-23 07:12:00,657 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 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 07:12:00,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 07:12:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:00,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:12:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:01,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660285135] [2020-12-23 07:12:01,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:01,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106176223] [2020-12-23 07:12:01,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:01,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-23 07:12:01,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346298003] [2020-12-23 07:12:01,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:12:01,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:12:01,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:12:01,310 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-23 07:12:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:03,368 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-23 07:12:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:12:03,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-23 07:12:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:03,377 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:12:03,377 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:12:03,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:12:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:12:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 07:12:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:12:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 07:12:03,380 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-23 07:12:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:03,380 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 07:12:03,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:12:03,380 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 07:12:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:12:03,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:03,381 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:03,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:03,587 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2020-12-23 07:12:03,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:03,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120423641] [2020-12-23 07:12:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:03,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:03,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147341060] [2020-12-23 07:12:03,599 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 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 07:12:03,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:12:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:12:03,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:04,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120423641] [2020-12-23 07:12:04,286 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:04,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147341060] [2020-12-23 07:12:04,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:04,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-23 07:12:04,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145110324] [2020-12-23 07:12:04,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:12:04,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:12:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:12:04,289 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-23 07:12:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:08,678 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 07:12:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:12:08,681 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 07:12:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:08,682 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:12:08,682 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:12:08,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:12:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:12:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 07:12:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:12:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 07:12:08,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-23 07:12:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:08,686 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 07:12:08,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:12:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 07:12:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:12:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:08,687 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:08,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:12:08,901 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2020-12-23 07:12:08,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:08,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503923703] [2020-12-23 07:12:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:08,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:08,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066306390] [2020-12-23 07:12:08,918 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 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 07:12:08,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 07:12:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:12:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:09,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503923703] [2020-12-23 07:12:09,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:09,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066306390] [2020-12-23 07:12:09,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:09,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-23 07:12:09,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523235735] [2020-12-23 07:12:09,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:12:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:12:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:12:09,620 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-23 07:12:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:11,678 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-23 07:12:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:12:11,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-23 07:12:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:11,689 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:12:11,690 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:12:11,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:12:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:12:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 07:12:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:12:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 07:12:11,694 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-23 07:12:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:11,694 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 07:12:11,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:12:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 07:12:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:12:11,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:11,695 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:11,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:11,906 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2020-12-23 07:12:11,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:11,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167498339] [2020-12-23 07:12:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:11,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:11,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516464471] [2020-12-23 07:12:11,918 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 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 07:12:11,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 07:12:11,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:11,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:12:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167498339] [2020-12-23 07:12:12,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516464471] [2020-12-23 07:12:12,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:12,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 07:12:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771479868] [2020-12-23 07:12:12,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:12:12,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:12:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:12:12,724 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2020-12-23 07:12:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:14,795 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 07:12:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:12:14,802 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-23 07:12:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:14,803 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:12:14,803 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:12:14,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:12:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:12:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 07:12:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:12:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 07:12:14,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-23 07:12:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:14,808 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 07:12:14,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:12:14,808 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 07:12:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:12:14,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:14,809 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:15,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:12:15,009 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2020-12-23 07:12:15,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:15,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766949678] [2020-12-23 07:12:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:15,020 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:15,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118763134] [2020-12-23 07:12:15,021 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 07:12:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:12:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:15,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766949678] [2020-12-23 07:12:15,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:15,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118763134] [2020-12-23 07:12:15,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:15,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-23 07:12:15,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102964015] [2020-12-23 07:12:15,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:12:15,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:12:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:12:15,844 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-23 07:12:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:17,913 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-23 07:12:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:12:17,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-23 07:12:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:17,927 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:12:17,928 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:12:17,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:12:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:12:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:12:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:12:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 07:12:17,932 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-23 07:12:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:17,932 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 07:12:17,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:12:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 07:12:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:12:17,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:17,934 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:18,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:12:18,134 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2020-12-23 07:12:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:18,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753653824] [2020-12-23 07:12:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:18,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:18,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664814492] [2020-12-23 07:12:18,147 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 07:12:18,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:12:18,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:12:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:18,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753653824] [2020-12-23 07:12:18,966 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:18,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664814492] [2020-12-23 07:12:18,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:18,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-23 07:12:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82167807] [2020-12-23 07:12:18,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:12:18,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:12:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:12:18,968 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-23 07:12:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:21,034 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 07:12:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:12:21,046 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-23 07:12:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:21,047 INFO L225 Difference]: With dead ends: 38 [2020-12-23 07:12:21,047 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 07:12:21,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:12:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 07:12:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 07:12:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:12:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 07:12:21,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-23 07:12:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:21,052 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 07:12:21,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:12:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 07:12:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:12:21,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:21,053 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:21,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:12:21,257 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2020-12-23 07:12:21,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:21,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197656088] [2020-12-23 07:12:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:21,268 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:21,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466563500] [2020-12-23 07:12:21,269 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 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 07:12:21,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 07:12:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:12:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:22,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197656088] [2020-12-23 07:12:22,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:22,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466563500] [2020-12-23 07:12:22,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:22,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-23 07:12:22,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650627421] [2020-12-23 07:12:22,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:12:22,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:22,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:12:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:12:22,197 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-23 07:12:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:24,264 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-23 07:12:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:12:24,271 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-23 07:12:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:24,271 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:12:24,271 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:12:24,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:12:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:12:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 07:12:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:12:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 07:12:24,282 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-23 07:12:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:24,282 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 07:12:24,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:12:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 07:12:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:12:24,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:24,283 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:24,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:12:24,497 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2020-12-23 07:12:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:24,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416984339] [2020-12-23 07:12:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:24,508 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:24,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028026360] [2020-12-23 07:12:24,509 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 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 07:12:24,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:12:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:12:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416984339] [2020-12-23 07:12:25,482 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028026360] [2020-12-23 07:12:25,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:25,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 07:12:25,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500072518] [2020-12-23 07:12:25,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:12:25,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:12:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:12:25,484 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-23 07:12:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:27,572 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 07:12:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:12:27,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-23 07:12:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:27,580 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:12:27,580 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 07:12:27,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:12:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 07:12:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 07:12:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:12:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-23 07:12:27,585 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-23 07:12:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:27,585 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-23 07:12:27,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:12:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-23 07:12:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:12:27,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:27,586 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:27,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:12:27,786 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2020-12-23 07:12:27,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:27,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903206327] [2020-12-23 07:12:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:27,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:27,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484643384] [2020-12-23 07:12:27,797 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 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 07:12:27,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 07:12:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:12:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:28,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903206327] [2020-12-23 07:12:28,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:28,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484643384] [2020-12-23 07:12:28,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:28,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-23 07:12:28,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482559783] [2020-12-23 07:12:28,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:12:28,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:12:28,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:12:28,825 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-23 07:12:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:30,918 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-23 07:12:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:12:30,935 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-23 07:12:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:30,936 INFO L225 Difference]: With dead ends: 41 [2020-12-23 07:12:30,936 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:12:30,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:12:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:12:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:12:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:12:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 07:12:30,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-23 07:12:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:30,940 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 07:12:30,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:12:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 07:12:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:12:30,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:30,941 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:31,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:31,142 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2020-12-23 07:12:31,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:31,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462898211] [2020-12-23 07:12:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:31,153 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:31,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398026743] [2020-12-23 07:12:31,154 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:31,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 07:12:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:12:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:32,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462898211] [2020-12-23 07:12:32,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:32,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398026743] [2020-12-23 07:12:32,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:32,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-23 07:12:32,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967959182] [2020-12-23 07:12:32,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:12:32,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:32,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:12:32,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:12:32,289 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2020-12-23 07:12:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:34,392 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 07:12:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:12:34,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-23 07:12:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:34,405 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:12:34,405 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:12:34,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:12:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:12:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 07:12:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:12:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 07:12:34,409 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-23 07:12:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:34,409 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 07:12:34,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:12:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 07:12:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:12:34,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:34,410 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:34,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:34,611 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2020-12-23 07:12:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:34,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62049145] [2020-12-23 07:12:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:34,628 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:34,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910413945] [2020-12-23 07:12:34,629 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:12:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:35,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62049145] [2020-12-23 07:12:35,787 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:35,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910413945] [2020-12-23 07:12:35,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:35,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-12-23 07:12:35,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326153547] [2020-12-23 07:12:35,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:12:35,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:35,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:12:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:12:35,789 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-23 07:12:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:37,882 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-23 07:12:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:12:37,902 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-23 07:12:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:37,902 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:12:37,902 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:12:37,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:12:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:12:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 07:12:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:12:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 07:12:37,907 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-23 07:12:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:37,907 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 07:12:37,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:12:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 07:12:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:12:37,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:37,908 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:38,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:12:38,117 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2020-12-23 07:12:38,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:38,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810401659] [2020-12-23 07:12:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:38,127 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:38,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452703239] [2020-12-23 07:12:38,127 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:38,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:12:38,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:12:38,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:39,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810401659] [2020-12-23 07:12:39,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:39,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452703239] [2020-12-23 07:12:39,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:39,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-23 07:12:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654152672] [2020-12-23 07:12:39,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:12:39,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:39,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:12:39,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:12:39,330 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-23 07:12:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:41,419 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 07:12:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:12:41,440 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-23 07:12:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:41,441 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:12:41,441 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:12:41,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:12:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:12:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 07:12:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 07:12:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 07:12:41,445 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-23 07:12:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:41,446 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 07:12:41,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:12:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 07:12:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:12:41,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:41,446 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:41,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:41,653 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2020-12-23 07:12:41,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:41,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323081715] [2020-12-23 07:12:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:41,663 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:41,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380715050] [2020-12-23 07:12:41,663 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:41,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 07:12:41,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:12:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323081715] [2020-12-23 07:12:42,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:42,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380715050] [2020-12-23 07:12:42,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:42,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 07:12:42,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369882577] [2020-12-23 07:12:42,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:12:42,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:12:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:12:42,979 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-23 07:12:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:45,076 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-23 07:12:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:12:45,088 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-23 07:12:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:45,089 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:12:45,089 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:12:45,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:12:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:12:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:12:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:12:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 07:12:45,093 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-23 07:12:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:45,093 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 07:12:45,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:12:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 07:12:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:12:45,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:45,094 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:45,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:12:45,298 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2020-12-23 07:12:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:45,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055323247] [2020-12-23 07:12:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:45,309 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:45,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857705175] [2020-12-23 07:12:45,310 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:45,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:12:45,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:12:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055323247] [2020-12-23 07:12:46,676 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857705175] [2020-12-23 07:12:46,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:46,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-23 07:12:46,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408533113] [2020-12-23 07:12:46,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:12:46,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:12:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:12:46,678 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-23 07:12:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:48,784 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 07:12:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:12:48,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-23 07:12:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:48,794 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:12:48,794 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 07:12:48,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:12:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 07:12:48,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 07:12:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 07:12:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-23 07:12:48,798 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-23 07:12:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:48,798 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-23 07:12:48,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:12:48,798 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-23 07:12:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:12:48,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:48,799 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:49,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:49,008 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2020-12-23 07:12:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:49,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899539034] [2020-12-23 07:12:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:49,020 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:49,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039390917] [2020-12-23 07:12:49,020 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:49,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 07:12:49,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:49,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:12:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:50,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899539034] [2020-12-23 07:12:50,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:50,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039390917] [2020-12-23 07:12:50,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:50,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-23 07:12:50,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577207610] [2020-12-23 07:12:50,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:12:50,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:50,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:12:50,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:12:50,472 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-23 07:12:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:54,844 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-23 07:12:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:12:54,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-23 07:12:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:54,850 INFO L225 Difference]: With dead ends: 47 [2020-12-23 07:12:54,850 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 07:12:54,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:12:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 07:12:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 07:12:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:12:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 07:12:54,856 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-23 07:12:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:54,856 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 07:12:54,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:12:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 07:12:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:12:54,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:54,858 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:55,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:12:55,061 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2020-12-23 07:12:55,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:55,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778691723] [2020-12-23 07:12:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:55,073 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:55,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190958389] [2020-12-23 07:12:55,074 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:55,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:12:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:12:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:12:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:12:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:12:56,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778691723] [2020-12-23 07:12:56,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:12:56,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190958389] [2020-12-23 07:12:56,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:12:56,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-23 07:12:56,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168903707] [2020-12-23 07:12:56,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:12:56,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:12:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:12:56,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:12:56,592 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-23 07:12:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:12:58,708 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 07:12:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:12:58,720 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-23 07:12:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:12:58,720 INFO L225 Difference]: With dead ends: 48 [2020-12-23 07:12:58,721 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 07:12:58,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:12:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 07:12:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 07:12:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:12:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 07:12:58,724 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-23 07:12:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:12:58,724 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 07:12:58,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:12:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 07:12:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:12:58,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:12:58,725 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-23 07:12:58,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:12:58,927 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:12:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:12:58,928 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2020-12-23 07:12:58,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:12:58,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681542626] [2020-12-23 07:12:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:12:58,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:12:58,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133134667] [2020-12-23 07:12:58,939 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:12:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:12:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:12:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:00,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681542626] [2020-12-23 07:13:00,424 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:00,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133134667] [2020-12-23 07:13:00,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:00,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-12-23 07:13:00,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447471745] [2020-12-23 07:13:00,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:13:00,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:13:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:13:00,427 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-23 07:13:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:02,548 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-23 07:13:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:13:02,569 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-23 07:13:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:02,570 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:13:02,570 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 07:13:02,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:13:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 07:13:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 07:13:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 07:13:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 07:13:02,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-23 07:13:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:02,573 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 07:13:02,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:13:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 07:13:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:13:02,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:02,573 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:02,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:13:02,774 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2020-12-23 07:13:02,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:02,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273337200] [2020-12-23 07:13:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:02,785 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:02,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407522333] [2020-12-23 07:13:02,786 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:02,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:02,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:13:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:04,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273337200] [2020-12-23 07:13:04,424 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407522333] [2020-12-23 07:13:04,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:04,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 07:13:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901899879] [2020-12-23 07:13:04,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:13:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:13:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:13:04,426 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-23 07:13:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:06,530 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 07:13:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:13:06,537 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-23 07:13:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:06,537 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:13:06,537 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 07:13:06,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:13:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 07:13:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 07:13:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:13:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 07:13:06,540 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-23 07:13:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:06,540 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 07:13:06,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:13:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 07:13:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:13:06,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:06,541 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:06,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:13:06,742 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2020-12-23 07:13:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:06,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350351521] [2020-12-23 07:13:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:06,754 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:06,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171625130] [2020-12-23 07:13:06,754 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:06,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 07:13:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:13:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:08,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350351521] [2020-12-23 07:13:08,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:08,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171625130] [2020-12-23 07:13:08,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:08,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-23 07:13:08,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650005915] [2020-12-23 07:13:08,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:13:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:13:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:13:08,510 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-23 07:13:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:10,639 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-23 07:13:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 07:13:10,651 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-23 07:13:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:10,652 INFO L225 Difference]: With dead ends: 51 [2020-12-23 07:13:10,652 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:13:10,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:13:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:13:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 07:13:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:13:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 07:13:10,655 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-23 07:13:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:10,655 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 07:13:10,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:13:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 07:13:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:13:10,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:10,656 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:10,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:13:10,857 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2020-12-23 07:13:10,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:10,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243542635] [2020-12-23 07:13:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:10,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:10,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972318101] [2020-12-23 07:13:10,869 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:10,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:10,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:13:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:12,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243542635] [2020-12-23 07:13:12,697 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:12,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972318101] [2020-12-23 07:13:12,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:12,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-23 07:13:12,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598280105] [2020-12-23 07:13:12,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 07:13:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 07:13:12,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:13:12,699 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-23 07:13:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:14,821 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 07:13:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:13:14,840 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-23 07:13:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:14,841 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:13:14,841 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 07:13:14,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 07:13:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 07:13:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 07:13:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:13:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 07:13:14,848 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-23 07:13:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:14,848 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 07:13:14,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 07:13:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 07:13:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:13:14,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:14,849 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:15,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:15,052 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2020-12-23 07:13:15,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:15,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351172181] [2020-12-23 07:13:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:15,065 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:15,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5458511] [2020-12-23 07:13:15,065 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:15,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 07:13:15,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:15,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 07:13:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:16,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351172181] [2020-12-23 07:13:16,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:16,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5458511] [2020-12-23 07:13:16,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:16,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-23 07:13:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790941878] [2020-12-23 07:13:16,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:13:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:13:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:13:16,974 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-23 07:13:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:19,087 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-23 07:13:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:13:19,108 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-23 07:13:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:19,108 INFO L225 Difference]: With dead ends: 53 [2020-12-23 07:13:19,108 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:13:19,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:13:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:13:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 07:13:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:13:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-23 07:13:19,118 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-23 07:13:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:19,118 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-23 07:13:19,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:13:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-23 07:13:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:13:19,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:19,119 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:19,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:19,333 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash 218608971, now seen corresponding path program 42 times [2020-12-23 07:13:19,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:19,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403684926] [2020-12-23 07:13:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:19,346 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:19,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271950869] [2020-12-23 07:13:19,346 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:19,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 07:13:19,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:13:19,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:21,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403684926] [2020-12-23 07:13:21,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:21,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271950869] [2020-12-23 07:13:21,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:21,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-23 07:13:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351787366] [2020-12-23 07:13:21,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:13:21,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:13:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:13:21,351 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 46 states. [2020-12-23 07:13:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:23,447 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 07:13:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 07:13:23,459 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2020-12-23 07:13:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:23,460 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:13:23,460 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:13:23,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:13:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:13:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 07:13:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 07:13:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-23 07:13:23,463 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-12-23 07:13:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:23,463 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-23 07:13:23,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:13:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-23 07:13:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:13:23,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:23,464 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:23,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:23,680 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 43 times [2020-12-23 07:13:23,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:23,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056657455] [2020-12-23 07:13:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:23,691 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:23,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206134594] [2020-12-23 07:13:23,691 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:13:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056657455] [2020-12-23 07:13:25,754 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206134594] [2020-12-23 07:13:25,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:25,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-23 07:13:25,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440567672] [2020-12-23 07:13:25,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:13:25,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:25,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:13:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:13:25,755 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-23 07:13:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:27,863 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-23 07:13:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:13:27,875 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-23 07:13:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:27,876 INFO L225 Difference]: With dead ends: 55 [2020-12-23 07:13:27,876 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:13:27,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:13:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:13:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 07:13:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:13:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 07:13:27,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-12-23 07:13:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:27,879 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 07:13:27,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:13:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 07:13:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:13:27,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:27,880 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:28,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:13:28,081 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash -316884501, now seen corresponding path program 44 times [2020-12-23 07:13:28,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:28,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656241418] [2020-12-23 07:13:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:28,093 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:28,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036997388] [2020-12-23 07:13:28,093 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:28,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:13:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:13:28,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:30,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656241418] [2020-12-23 07:13:30,173 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:30,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036997388] [2020-12-23 07:13:30,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:30,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-23 07:13:30,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212444325] [2020-12-23 07:13:30,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:13:30,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:13:30,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:30,174 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 48 states. [2020-12-23 07:13:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:35,049 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 07:13:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:13:35,056 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 50 [2020-12-23 07:13:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:35,056 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:13:35,057 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:13:35,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:13:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:13:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 07:13:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 07:13:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-23 07:13:35,060 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-12-23 07:13:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:35,061 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-23 07:13:35,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:13:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-23 07:13:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:13:35,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:35,062 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:35,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 07:13:35,277 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 45 times [2020-12-23 07:13:35,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:35,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577919960] [2020-12-23 07:13:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:35,290 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:35,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402373285] [2020-12-23 07:13:35,290 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:35,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 07:13:35,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:13:35,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577919960] [2020-12-23 07:13:37,519 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402373285] [2020-12-23 07:13:37,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:37,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-23 07:13:37,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274169001] [2020-12-23 07:13:37,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:13:37,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:37,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:13:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:13:37,521 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2020-12-23 07:13:39,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:39,664 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-12-23 07:13:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 07:13:39,679 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2020-12-23 07:13:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:39,680 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:13:39,680 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:13:39,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:13:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:13:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 07:13:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:13:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-23 07:13:39,684 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-12-23 07:13:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:39,685 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-23 07:13:39,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:13:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-23 07:13:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:13:39,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:39,685 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:39,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 07:13:39,895 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 46 times [2020-12-23 07:13:39,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:39,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986103122] [2020-12-23 07:13:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:39,907 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:39,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69452857] [2020-12-23 07:13:39,907 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:39,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:13:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:13:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986103122] [2020-12-23 07:13:42,209 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69452857] [2020-12-23 07:13:42,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:42,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-23 07:13:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417530102] [2020-12-23 07:13:42,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:13:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:13:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:13:42,211 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 50 states. [2020-12-23 07:13:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:44,359 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-23 07:13:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:13:44,372 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 52 [2020-12-23 07:13:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:44,373 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:13:44,373 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:13:44,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:13:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:13:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 07:13:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:13:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-23 07:13:44,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-12-23 07:13:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:44,376 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-23 07:13:44,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:13:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-23 07:13:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 07:13:44,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:44,383 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:44,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:44,584 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 47 times [2020-12-23 07:13:44,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:44,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039852135] [2020-12-23 07:13:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:44,597 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:44,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269232975] [2020-12-23 07:13:44,597 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:44,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 07:13:44,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:13:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:47,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039852135] [2020-12-23 07:13:47,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:47,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269232975] [2020-12-23 07:13:47,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:47,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-12-23 07:13:47,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968091026] [2020-12-23 07:13:47,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:13:47,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:13:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:13:47,059 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 51 states. [2020-12-23 07:13:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:49,177 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-23 07:13:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 07:13:49,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 53 [2020-12-23 07:13:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:49,190 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:13:49,190 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 07:13:49,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:13:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 07:13:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 07:13:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:13:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-23 07:13:49,193 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-12-23 07:13:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:49,194 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-23 07:13:49,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:13:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-23 07:13:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:13:49,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:49,194 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:49,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:13:49,395 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash 717540139, now seen corresponding path program 48 times [2020-12-23 07:13:49,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:49,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702185299] [2020-12-23 07:13:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:49,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:49,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25937718] [2020-12-23 07:13:49,408 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:49,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 07:13:49,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:13:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:13:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:13:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:13:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702185299] [2020-12-23 07:13:52,196 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:13:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25937718] [2020-12-23 07:13:52,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:13:52,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-23 07:13:52,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918518683] [2020-12-23 07:13:52,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:13:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:13:52,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:13:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:13:52,198 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 52 states. [2020-12-23 07:13:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:13:57,219 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-23 07:13:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 07:13:57,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 54 [2020-12-23 07:13:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:13:57,228 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:13:57,228 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:13:57,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:13:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:13:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 07:13:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:13:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-23 07:13:57,232 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-12-23 07:13:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:13:57,232 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-23 07:13:57,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:13:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-23 07:13:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 07:13:57,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:13:57,233 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1] [2020-12-23 07:13:57,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:13:57,436 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:13:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:13:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash 770573200, now seen corresponding path program 49 times [2020-12-23 07:13:57,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:13:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788670266] [2020-12-23 07:13:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:13:57,449 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:13:57,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973596920] [2020-12-23 07:13:57,449 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:13:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:13:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:13:57,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:00,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788670266] [2020-12-23 07:14:00,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:00,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973596920] [2020-12-23 07:14:00,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:00,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-12-23 07:14:00,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574937321] [2020-12-23 07:14:00,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:14:00,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:00,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:14:00,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:14:00,254 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2020-12-23 07:14:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:02,461 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-12-23 07:14:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:14:02,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2020-12-23 07:14:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:02,486 INFO L225 Difference]: With dead ends: 61 [2020-12-23 07:14:02,486 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:14:02,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:14:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:14:02,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 07:14:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:14:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-23 07:14:02,490 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-12-23 07:14:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:02,490 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-23 07:14:02,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:14:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-23 07:14:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 07:14:02,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:02,491 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:02,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:14:02,696 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1880369205, now seen corresponding path program 50 times [2020-12-23 07:14:02,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:02,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008635010] [2020-12-23 07:14:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:02,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:02,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471434445] [2020-12-23 07:14:02,709 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:02,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:14:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008635010] [2020-12-23 07:14:05,647 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471434445] [2020-12-23 07:14:05,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:05,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 07:14:05,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856709899] [2020-12-23 07:14:05,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:14:05,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:05,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:14:05,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:14:05,652 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 54 states. [2020-12-23 07:14:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:07,819 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 07:14:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:14:07,838 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 56 [2020-12-23 07:14:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:07,839 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:14:07,839 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:14:07,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:14:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:14:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 07:14:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 07:14:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-23 07:14:07,842 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-12-23 07:14:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:07,843 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-23 07:14:07,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:14:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-23 07:14:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:14:07,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:07,843 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:08,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 07:14:08,044 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1839762160, now seen corresponding path program 51 times [2020-12-23 07:14:08,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:08,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163699269] [2020-12-23 07:14:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:08,057 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:08,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909621611] [2020-12-23 07:14:08,057 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:08,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-23 07:14:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:14:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:11,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163699269] [2020-12-23 07:14:11,093 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:11,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909621611] [2020-12-23 07:14:11,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:11,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-12-23 07:14:11,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939723904] [2020-12-23 07:14:11,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:14:11,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:11,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:14:11,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:14:11,095 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 55 states. [2020-12-23 07:14:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:13,301 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-12-23 07:14:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 07:14:13,309 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 57 [2020-12-23 07:14:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:13,309 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:14:13,310 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:14:13,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:14:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:14:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 07:14:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:14:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-23 07:14:13,314 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-12-23 07:14:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:13,315 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-23 07:14:13,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:14:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-23 07:14:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 07:14:13,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:13,316 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:13,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:13,527 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1199717483, now seen corresponding path program 52 times [2020-12-23 07:14:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:13,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699001796] [2020-12-23 07:14:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:13,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:13,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363606238] [2020-12-23 07:14:13,539 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:13,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:14:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:13,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:14:13,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:16,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699001796] [2020-12-23 07:14:16,682 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:16,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363606238] [2020-12-23 07:14:16,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:16,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-12-23 07:14:16,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370757969] [2020-12-23 07:14:16,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:14:16,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:14:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:14:16,684 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 56 states. [2020-12-23 07:14:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:18,848 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-23 07:14:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:14:18,861 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 58 [2020-12-23 07:14:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:18,862 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:14:18,862 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:14:18,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:14:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:14:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 07:14:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:14:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-23 07:14:18,865 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-12-23 07:14:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:18,865 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-23 07:14:18,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:14:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-23 07:14:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 07:14:18,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:18,866 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:19,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 07:14:19,066 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1461798320, now seen corresponding path program 53 times [2020-12-23 07:14:19,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:19,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526922446] [2020-12-23 07:14:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:19,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:19,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138055934] [2020-12-23 07:14:19,080 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:19,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-23 07:14:19,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 07:14:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:22,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526922446] [2020-12-23 07:14:22,262 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138055934] [2020-12-23 07:14:22,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:22,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-12-23 07:14:22,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318470147] [2020-12-23 07:14:22,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:14:22,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:14:22,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:14:22,263 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 57 states. [2020-12-23 07:14:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:24,464 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-12-23 07:14:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:14:24,478 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 59 [2020-12-23 07:14:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:24,478 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:14:24,478 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:14:24,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:14:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:14:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 07:14:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:14:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-23 07:14:24,482 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-12-23 07:14:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:24,482 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-23 07:14:24,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:14:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-23 07:14:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 07:14:24,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:24,483 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:24,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:14:24,688 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1930557707, now seen corresponding path program 54 times [2020-12-23 07:14:24,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:24,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863518592] [2020-12-23 07:14:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:24,701 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:24,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804104141] [2020-12-23 07:14:24,702 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:24,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-23 07:14:24,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 07:14:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:28,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863518592] [2020-12-23 07:14:28,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:28,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804104141] [2020-12-23 07:14:28,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:28,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-23 07:14:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890813640] [2020-12-23 07:14:28,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 07:14:28,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 07:14:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:14:28,101 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 58 states. [2020-12-23 07:14:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:30,305 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-23 07:14:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 07:14:30,324 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 60 [2020-12-23 07:14:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:30,324 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:14:30,325 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:14:30,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:14:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:14:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 07:14:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:14:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-23 07:14:30,329 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-12-23 07:14:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:30,329 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-23 07:14:30,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 07:14:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-23 07:14:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 07:14:30,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:30,330 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:30,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:30,541 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -280587856, now seen corresponding path program 55 times [2020-12-23 07:14:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:30,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189359968] [2020-12-23 07:14:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:30,552 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:30,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625021537] [2020-12-23 07:14:30,553 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:14:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:14:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:33,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189359968] [2020-12-23 07:14:33,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:33,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625021537] [2020-12-23 07:14:33,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:33,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-12-23 07:14:33,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573810188] [2020-12-23 07:14:33,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:14:33,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:14:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:14:33,975 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 59 states. [2020-12-23 07:14:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:36,179 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-12-23 07:14:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:14:36,204 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 61 [2020-12-23 07:14:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:36,204 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:14:36,204 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:14:36,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:14:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:14:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 07:14:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:14:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-23 07:14:36,208 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-12-23 07:14:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:36,208 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-23 07:14:36,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:14:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-23 07:14:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 07:14:36,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:36,209 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:36,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:14:36,412 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash -106623573, now seen corresponding path program 56 times [2020-12-23 07:14:36,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:36,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115532743] [2020-12-23 07:14:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:36,425 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:36,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297142296] [2020-12-23 07:14:36,425 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:36,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:14:36,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:14:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:39,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115532743] [2020-12-23 07:14:39,994 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:39,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297142296] [2020-12-23 07:14:39,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:39,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-23 07:14:39,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555666729] [2020-12-23 07:14:39,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:14:39,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:14:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:14:39,996 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 60 states. [2020-12-23 07:14:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:14:54,127 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-23 07:14:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:14:54,132 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 62 [2020-12-23 07:14:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:14:54,133 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:14:54,133 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:14:54,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:14:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:14:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 07:14:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:14:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-12-23 07:14:54,136 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-12-23 07:14:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:14:54,136 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-12-23 07:14:54,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:14:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-12-23 07:14:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 07:14:54,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:14:54,136 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1] [2020-12-23 07:14:54,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:54,339 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:14:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:14:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 991301904, now seen corresponding path program 57 times [2020-12-23 07:14:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:14:54,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076903377] [2020-12-23 07:14:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:14:54,356 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:14:54,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521484672] [2020-12-23 07:14:54,357 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:14:54,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-23 07:14:54,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:14:54,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:14:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:14:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:14:57,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076903377] [2020-12-23 07:14:57,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:14:57,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521484672] [2020-12-23 07:14:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:14:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-12-23 07:14:57,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635688379] [2020-12-23 07:14:57,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:14:57,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:14:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:14:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:14:57,977 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 61 states. [2020-12-23 07:15:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:00,211 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-12-23 07:15:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 07:15:00,229 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 63 [2020-12-23 07:15:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:00,230 INFO L225 Difference]: With dead ends: 69 [2020-12-23 07:15:00,230 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:15:00,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:15:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:15:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-23 07:15:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:15:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-23 07:15:00,233 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-12-23 07:15:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:00,233 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-23 07:15:00,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:15:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-23 07:15:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:15:00,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:00,234 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:00,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:15:00,440 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash 667253323, now seen corresponding path program 58 times [2020-12-23 07:15:00,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:00,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161425691] [2020-12-23 07:15:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:00,452 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:15:00,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434577046] [2020-12-23 07:15:00,453 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:00,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:15:00,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:15:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:04,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161425691] [2020-12-23 07:15:04,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:15:04,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434577046] [2020-12-23 07:15:04,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:15:04,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-12-23 07:15:04,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312910695] [2020-12-23 07:15:04,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 07:15:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 07:15:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:15:04,219 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 62 states. [2020-12-23 07:15:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:10,005 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-23 07:15:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:15:10,013 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 64 [2020-12-23 07:15:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:10,013 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:15:10,013 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:15:10,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:15:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:15:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 07:15:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:15:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-12-23 07:15:10,016 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-12-23 07:15:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:10,016 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-12-23 07:15:10,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 07:15:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-12-23 07:15:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 07:15:10,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:10,017 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:10,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:15:10,218 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash -788318096, now seen corresponding path program 59 times [2020-12-23 07:15:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:10,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644468783] [2020-12-23 07:15:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:10,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:15:10,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145508770] [2020-12-23 07:15:10,232 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:10,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-23 07:15:10,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:10,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:15:10,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:14,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644468783] [2020-12-23 07:15:14,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:15:14,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145508770] [2020-12-23 07:15:14,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:15:14,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-12-23 07:15:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295109112] [2020-12-23 07:15:14,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:15:14,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:14,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:15:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:15:14,262 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 63 states. [2020-12-23 07:15:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:16,502 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-12-23 07:15:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 07:15:16,519 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 65 [2020-12-23 07:15:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:16,520 INFO L225 Difference]: With dead ends: 71 [2020-12-23 07:15:16,520 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 07:15:16,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:15:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 07:15:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 07:15:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:15:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-23 07:15:16,523 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-12-23 07:15:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:16,524 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-23 07:15:16,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:15:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-23 07:15:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:15:16,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:16,524 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:16,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 07:15:16,732 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1333608171, now seen corresponding path program 60 times [2020-12-23 07:15:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:16,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741587302] [2020-12-23 07:15:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:16,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:15:16,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78522989] [2020-12-23 07:15:16,747 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:16,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 07:15:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:15:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 07:15:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:15:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:15:20,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741587302] [2020-12-23 07:15:20,816 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:15:20,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78522989] [2020-12-23 07:15:20,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:15:20,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-12-23 07:15:20,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509385653] [2020-12-23 07:15:20,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:15:20,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:15:20,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:15:20,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:15:20,818 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 64 states. [2020-12-23 07:15:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:15:23,085 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-23 07:15:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 07:15:23,099 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 66 [2020-12-23 07:15:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:15:23,100 INFO L225 Difference]: With dead ends: 72 [2020-12-23 07:15:23,100 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:15:23,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:15:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:15:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-23 07:15:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 07:15:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-12-23 07:15:23,103 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-12-23 07:15:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:15:23,103 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-12-23 07:15:23,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:15:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-12-23 07:15:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 07:15:23,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:15:23,103 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1] [2020-12-23 07:15:23,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:23,304 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:15:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:15:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1606154288, now seen corresponding path program 61 times [2020-12-23 07:15:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:15:23,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969838830] [2020-12-23 07:15:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:15:23,318 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:15:23,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541758900] [2020-12-23 07:15:23,319 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:15:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:15:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:15:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates...