/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/array-tiling/poly1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:23:53,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:23:53,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:23:53,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:23:53,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:23:53,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:23:53,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:23:53,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:23:53,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:23:53,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:23:53,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:23:53,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:23:53,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:23:53,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:23:53,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:23:53,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:23:53,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:23:53,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:23:53,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:23:53,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:23:53,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:23:53,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:23:53,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:23:53,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:23:53,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:23:53,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:23:53,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:23:53,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:23:53,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:23:53,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:23:53,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:23:53,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:23:53,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:23:53,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:23:53,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:23:53,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:23:53,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:23:53,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:23:53,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:23:53,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:23:53,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:23:53,413 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:23:53,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:23:53,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:23:53,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:23:53,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:23:53,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:23:53,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:23:53,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:23:53,414 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:23:53,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:23:53,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:23:53,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:23:53,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:23:53,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:23:53,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:23:53,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:23:53,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:23:53,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:23:53,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:23:53,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:23:53,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:23:53,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:23:53,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:23:53,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:23:53,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:23:53,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:23:53,826 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:23:53,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/poly1.c [2021-01-06 10:23:53,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5bede6b14/d953dde933e046728a29d8a45bec8dfd/FLAGe6752224f [2021-01-06 10:23:54,601 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:23:54,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/poly1.c [2021-01-06 10:23:54,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5bede6b14/d953dde933e046728a29d8a45bec8dfd/FLAGe6752224f [2021-01-06 10:23:54,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5bede6b14/d953dde933e046728a29d8a45bec8dfd [2021-01-06 10:23:54,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:23:54,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:23:54,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:23:54,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:23:54,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:23:54,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:23:54" (1/1) ... [2021-01-06 10:23:54,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f045f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:54, skipping insertion in model container [2021-01-06 10:23:54,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:23:54" (1/1) ... [2021-01-06 10:23:54,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:23:55,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:23:55,168 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/array-tiling/poly1.c[396,409] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:23:55,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:23:55,197 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:23:55,211 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/array-tiling/poly1.c[396,409] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:23:55,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:23:55,234 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:23:55,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55 WrapperNode [2021-01-06 10:23:55,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:23:55,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:23:55,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:23:55,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:23:55,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:23:55,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:23:55,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:23:55,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:23:55,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (1/1) ... [2021-01-06 10:23:55,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:23:55,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:23:55,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:23:55,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:23:55,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (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 [2021-01-06 10:23:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:23:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:23:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:23:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 10:23:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:23:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:23:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:23:55,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:23:55,649 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:23:55,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:23:55 BoogieIcfgContainer [2021-01-06 10:23:55,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:23:55,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:23:55,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:23:55,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:23:55,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:23:54" (1/3) ... [2021-01-06 10:23:55,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f71ff3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:23:55, skipping insertion in model container [2021-01-06 10:23:55,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:55" (2/3) ... [2021-01-06 10:23:55,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f71ff3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:23:55, skipping insertion in model container [2021-01-06 10:23:55,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:23:55" (3/3) ... [2021-01-06 10:23:55,666 INFO L111 eAbstractionObserver]: Analyzing ICFG poly1.c [2021-01-06 10:23:55,689 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:23:55,698 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:23:55,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:23:55,851 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:23:55,852 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:23:55,852 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:23:55,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:23:55,852 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:23:55,852 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:23:55,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:23:55,853 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:23:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 10:23:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 10:23:55,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:55,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:55,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:55,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2021-01-06 10:23:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:55,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392754874] [2021-01-06 10:23:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:56,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392754874] [2021-01-06 10:23:56,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:23:56,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:23:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917553489] [2021-01-06 10:23:56,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:23:56,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:23:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:23:56,089 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 10:23:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:56,111 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-01-06 10:23:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:23:56,113 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 10:23:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:56,124 INFO L225 Difference]: With dead ends: 27 [2021-01-06 10:23:56,125 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 10:23:56,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:23:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 10:23:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 10:23:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 10:23:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 10:23:56,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 10:23:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:56,174 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 10:23:56,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:23:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 10:23:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 10:23:56,175 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:56,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:56,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:23:56,175 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2021-01-06 10:23:56,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:56,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5115780] [2021-01-06 10:23:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:56,198 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:23:56,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733798056] [2021-01-06 10:23:56,199 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 [2021-01-06 10:23:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:23:56,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:56,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5115780] [2021-01-06 10:23:56,443 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:23:56,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733798056] [2021-01-06 10:23:56,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:23:56,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:23:56,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721097162] [2021-01-06 10:23:56,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:23:56,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:23:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:23:56,459 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2021-01-06 10:23:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:56,497 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-01-06 10:23:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:23:56,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 10:23:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:56,498 INFO L225 Difference]: With dead ends: 21 [2021-01-06 10:23:56,499 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 10:23:56,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:23:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 10:23:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 10:23:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:23:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 10:23:56,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-01-06 10:23:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:56,509 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 10:23:56,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:23:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 10:23:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:23:56,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:56,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:56,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:23:56,727 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2021-01-06 10:23:56,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:56,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829799223] [2021-01-06 10:23:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:56,744 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:23:56,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360709256] [2021-01-06 10:23:56,745 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 [2021-01-06 10:23:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:23:56,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:56,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829799223] [2021-01-06 10:23:56,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:23:56,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360709256] [2021-01-06 10:23:56,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:23:56,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:23:56,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055294400] [2021-01-06 10:23:56,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:23:56,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:23:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:23:56,865 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2021-01-06 10:23:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:56,894 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-01-06 10:23:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:23:56,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-01-06 10:23:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:56,895 INFO L225 Difference]: With dead ends: 23 [2021-01-06 10:23:56,896 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 10:23:56,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:23:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 10:23:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 10:23:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:23:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 10:23:56,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 10:23:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:56,901 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 10:23:56,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:23:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 10:23:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:23:56,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:56,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:57,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:57,118 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1163175951, now seen corresponding path program 2 times [2021-01-06 10:23:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:57,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626224666] [2021-01-06 10:23:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:57,136 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:23:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977157148] [2021-01-06 10:23:57,136 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 [2021-01-06 10:23:57,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:23:57,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:57,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:23:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:57,246 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:23:57,248 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:57,255 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:57,258 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:57,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:23:57,330 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:57,330 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 50 [2021-01-06 10:23:57,337 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:57,359 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 10:23:57,365 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:23:57,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2021-01-06 10:23:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:57,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626224666] [2021-01-06 10:23:57,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:23:57,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977157148] [2021-01-06 10:23:57,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:23:57,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:23:57,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779810722] [2021-01-06 10:23:57,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:23:57,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:23:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:23:57,501 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2021-01-06 10:23:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:57,858 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 10:23:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:23:57,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 10:23:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:57,859 INFO L225 Difference]: With dead ends: 22 [2021-01-06 10:23:57,859 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:23:57,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:23:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:23:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 10:23:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:23:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 10:23:57,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-01-06 10:23:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:57,865 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 10:23:57,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:23:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 10:23:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:23:57,866 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:57,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:58,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:58,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash -998974267, now seen corresponding path program 1 times [2021-01-06 10:23:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:58,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952159152] [2021-01-06 10:23:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:58,085 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:23:58,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318841654] [2021-01-06 10:23:58,087 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 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 [2021-01-06 10:23:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:23:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:58,165 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:23:58,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:58,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:58,171 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:58,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:23:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952159152] [2021-01-06 10:23:58,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:23:58,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318841654] [2021-01-06 10:23:58,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:23:58,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:23:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772847187] [2021-01-06 10:23:58,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:23:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:23:58,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:23:58,300 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2021-01-06 10:23:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:58,436 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-01-06 10:23:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:23:58,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 10:23:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:58,438 INFO L225 Difference]: With dead ends: 27 [2021-01-06 10:23:58,438 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:23:58,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:23:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:23:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-01-06 10:23:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:23:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 10:23:58,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-01-06 10:23:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:58,446 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 10:23:58,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:23:58,446 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 10:23:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:23:58,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:58,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:58,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:58,662 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 2 times [2021-01-06 10:23:58,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:58,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099210447] [2021-01-06 10:23:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:58,677 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:23:58,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014086405] [2021-01-06 10:23:58,678 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 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 [2021-01-06 10:23:58,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:23:58,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:23:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:58,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099210447] [2021-01-06 10:23:58,821 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:23:58,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014086405] [2021-01-06 10:23:58,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:23:58,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:23:58,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938163567] [2021-01-06 10:23:58,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:23:58,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:23:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:23:58,824 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2021-01-06 10:23:58,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:58,980 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-01-06 10:23:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:23:58,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 10:23:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:58,982 INFO L225 Difference]: With dead ends: 48 [2021-01-06 10:23:58,982 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:23:58,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:23:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:23:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 10:23:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:23:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 10:23:58,990 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2021-01-06 10:23:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:58,991 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 10:23:58,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:23:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 10:23:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:23:58,992 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:58,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:59,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:23:59,208 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -78082663, now seen corresponding path program 3 times [2021-01-06 10:23:59,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:59,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099341027] [2021-01-06 10:23:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:59,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:23:59,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377000688] [2021-01-06 10:23:59,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:59,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:23:59,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:23:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:59,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:23:59,341 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:59,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:59,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:59,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:23:59,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:59,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:23:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:59,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099341027] [2021-01-06 10:23:59,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:23:59,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377000688] [2021-01-06 10:23:59,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:23:59,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:23:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6444963] [2021-01-06 10:23:59,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:23:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:23:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:23:59,721 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2021-01-06 10:24:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:08,520 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 10:24:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:24:08,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2021-01-06 10:24:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:08,522 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:24:08,522 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:24:08,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:24:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:24:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2021-01-06 10:24:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:24:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 10:24:08,532 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2021-01-06 10:24:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:08,533 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 10:24:08,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:24:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 10:24:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:24:08,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:08,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:08,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:08,749 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash 20710711, now seen corresponding path program 4 times [2021-01-06 10:24:08,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:08,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736624989] [2021-01-06 10:24:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:08,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:08,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538705560] [2021-01-06 10:24:08,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:08,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:24:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:24:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:08,857 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:24:08,859 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:08,865 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:08,866 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:08,867 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:24:08,927 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:08,927 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 58 [2021-01-06 10:24:08,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:08,963 INFO L625 ElimStorePlain]: treesize reduction 24, result has 52.0 percent of original size [2021-01-06 10:24:08,965 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:24:08,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2021-01-06 10:24:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:09,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736624989] [2021-01-06 10:24:09,308 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:09,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538705560] [2021-01-06 10:24:09,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:09,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:24:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045997695] [2021-01-06 10:24:09,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:24:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:24:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:24:09,311 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2021-01-06 10:24:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:10,105 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-01-06 10:24:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:24:10,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 10:24:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:10,107 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:24:10,107 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:24:10,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:24:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:24:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2021-01-06 10:24:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:24:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 10:24:10,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-01-06 10:24:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:10,117 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 10:24:10,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:24:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 10:24:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:24:10,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:10,119 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:10,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:10,334 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1670835535, now seen corresponding path program 5 times [2021-01-06 10:24:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:10,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837671820] [2021-01-06 10:24:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:10,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:10,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804378640] [2021-01-06 10:24:10,347 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 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 [2021-01-06 10:24:11,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 10:24:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:11,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:24:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837671820] [2021-01-06 10:24:11,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804378640] [2021-01-06 10:24:11,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:11,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:24:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707331089] [2021-01-06 10:24:11,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:24:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:24:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:24:11,155 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2021-01-06 10:24:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:11,305 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-01-06 10:24:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:24:11,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2021-01-06 10:24:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:11,307 INFO L225 Difference]: With dead ends: 58 [2021-01-06 10:24:11,307 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 10:24:11,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:24:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 10:24:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 10:24:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:24:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 10:24:11,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2021-01-06 10:24:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:11,316 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 10:24:11,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:24:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 10:24:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:24:11,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:11,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:11,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:24:11,533 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1436116461, now seen corresponding path program 6 times [2021-01-06 10:24:11,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:11,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724295195] [2021-01-06 10:24:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:11,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:11,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596365916] [2021-01-06 10:24:11,546 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 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 [2021-01-06 10:24:11,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:24:11,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:11,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:24:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:11,675 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:11,676 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:11,681 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:11,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 10:24:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:11,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724295195] [2021-01-06 10:24:11,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:11,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596365916] [2021-01-06 10:24:11,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:11,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:24:11,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833950246] [2021-01-06 10:24:11,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:24:11,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:24:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:24:11,853 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2021-01-06 10:24:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:12,062 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-01-06 10:24:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:24:12,063 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2021-01-06 10:24:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:12,064 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:24:12,064 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:24:12,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:24:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:24:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-01-06 10:24:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:24:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 10:24:12,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-01-06 10:24:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:12,074 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 10:24:12,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:24:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 10:24:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:24:12,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:12,075 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:12,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:12,289 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:12,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2041873501, now seen corresponding path program 7 times [2021-01-06 10:24:12,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:12,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722590763] [2021-01-06 10:24:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:12,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:12,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820348042] [2021-01-06 10:24:12,306 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 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 [2021-01-06 10:24:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:24:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722590763] [2021-01-06 10:24:12,546 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820348042] [2021-01-06 10:24:12,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:12,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:24:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610924106] [2021-01-06 10:24:12,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:24:12,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:24:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:24:12,548 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2021-01-06 10:24:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:12,717 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-01-06 10:24:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:24:12,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2021-01-06 10:24:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:12,719 INFO L225 Difference]: With dead ends: 68 [2021-01-06 10:24:12,719 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:24:12,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:24:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:24:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-01-06 10:24:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:24:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 10:24:12,729 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-01-06 10:24:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:12,730 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 10:24:12,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:24:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 10:24:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:24:12,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:12,731 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:12,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:12,945 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash 11306433, now seen corresponding path program 8 times [2021-01-06 10:24:12,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:12,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194263307] [2021-01-06 10:24:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:12,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:12,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996989768] [2021-01-06 10:24:12,958 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 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 [2021-01-06 10:24:13,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:24:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:13,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:24:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:13,105 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:13,106 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:13,108 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:13,109 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:13,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:24:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:13,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194263307] [2021-01-06 10:24:13,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:13,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996989768] [2021-01-06 10:24:13,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:13,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:24:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656363168] [2021-01-06 10:24:13,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:24:13,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:24:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:24:13,305 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2021-01-06 10:24:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:13,586 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-01-06 10:24:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:24:13,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2021-01-06 10:24:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:13,588 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:24:13,588 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:24:13,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:24:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:24:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-01-06 10:24:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:24:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 10:24:13,598 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-01-06 10:24:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:13,598 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 10:24:13,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:24:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 10:24:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:24:13,600 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:13,600 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:13,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:24:13,815 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:13,816 INFO L82 PathProgramCache]: Analyzing trace with hash 811766135, now seen corresponding path program 9 times [2021-01-06 10:24:13,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:13,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908316218] [2021-01-06 10:24:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:13,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:13,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780031900] [2021-01-06 10:24:13,828 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 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 [2021-01-06 10:24:13,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:24:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:24:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:14,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908316218] [2021-01-06 10:24:14,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:14,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780031900] [2021-01-06 10:24:14,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:14,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:24:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941244981] [2021-01-06 10:24:14,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:24:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:24:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:24:14,151 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2021-01-06 10:24:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:14,336 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-01-06 10:24:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:24:14,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2021-01-06 10:24:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:14,338 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:24:14,338 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:24:14,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:24:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:24:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-01-06 10:24:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:24:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 10:24:14,349 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-01-06 10:24:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:14,350 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 10:24:14,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:24:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 10:24:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:24:14,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:14,351 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:14,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:24:14,565 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash -816902891, now seen corresponding path program 10 times [2021-01-06 10:24:14,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:14,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615525866] [2021-01-06 10:24:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:14,576 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:14,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201449353] [2021-01-06 10:24:14,576 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 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 [2021-01-06 10:24:14,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:24:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:24:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:14,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:14,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:14,706 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:14,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:24:14,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:24:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:14,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615525866] [2021-01-06 10:24:14,942 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:14,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201449353] [2021-01-06 10:24:14,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:14,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:24:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630580226] [2021-01-06 10:24:14,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:24:14,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:14,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:24:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:24:14,945 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2021-01-06 10:24:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:15,289 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-01-06 10:24:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:24:15,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2021-01-06 10:24:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:15,290 INFO L225 Difference]: With dead ends: 51 [2021-01-06 10:24:15,290 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:24:15,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:24:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:24:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-01-06 10:24:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:24:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 10:24:15,303 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-01-06 10:24:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:15,303 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 10:24:15,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:24:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 10:24:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 10:24:15,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:15,304 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:15,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:24:15,518 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1359564491, now seen corresponding path program 11 times [2021-01-06 10:24:15,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:15,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922137366] [2021-01-06 10:24:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:15,531 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:15,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978758000] [2021-01-06 10:24:15,532 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 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 [2021-01-06 10:24:15,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 10:24:15,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:24:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:15,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922137366] [2021-01-06 10:24:15,875 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:24:15,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978758000] [2021-01-06 10:24:15,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:24:15,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:24:15,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626191858] [2021-01-06 10:24:15,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:24:15,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:15,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:24:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:24:15,877 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2021-01-06 10:24:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:16,123 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-01-06 10:24:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:24:16,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2021-01-06 10:24:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:16,125 INFO L225 Difference]: With dead ends: 88 [2021-01-06 10:24:16,125 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:24:16,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:24:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:24:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-01-06 10:24:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:24:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 10:24:16,137 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2021-01-06 10:24:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:16,137 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 10:24:16,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:24:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 10:24:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:24:16,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:16,138 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:16,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:16,353 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1401297897, now seen corresponding path program 12 times [2021-01-06 10:24:16,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:16,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283794957] [2021-01-06 10:24:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:16,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:24:16,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087281029] [2021-01-06 10:24:16,369 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 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