/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-programs/partial_mod_count_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:39:02,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:39:02,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:39:02,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:39:02,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:39:02,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:39:02,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:39:02,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:39:02,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:39:02,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:39:02,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:39:02,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:39:02,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:39:02,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:39:02,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:39:02,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:39:02,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:39:02,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:39:02,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:39:02,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:39:02,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:39:02,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:39:02,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:39:02,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:39:02,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:39:02,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:39:02,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:39:02,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:39:02,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:39:02,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:39:02,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:39:02,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:39:02,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:39:02,341 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:39:02,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:39:02,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:39:02,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:39:02,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:39:02,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:39:02,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:39:02,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:39:02,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:39:02,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:39:02,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:39:02,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:39:02,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:39:02,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:39:02,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:39:02,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:39:02,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:39:02,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:39:02,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:39:02,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:39:02,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:39:02,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:39:02,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:39:02,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:39:02,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:39:02,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:39:02,789 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:39:02,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2020-12-23 00:39:02,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/47a7760a7/013cab64709f419c90537a3a06d41cf7/FLAG6268134fa [2020-12-23 00:39:03,558 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:39:03,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2020-12-23 00:39:03,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/47a7760a7/013cab64709f419c90537a3a06d41cf7/FLAG6268134fa [2020-12-23 00:39:03,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/47a7760a7/013cab64709f419c90537a3a06d41cf7 [2020-12-23 00:39:03,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:39:03,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:39:03,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:39:03,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:39:03,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:39:03,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:39:03" (1/1) ... [2020-12-23 00:39:03,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378195d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:03, skipping insertion in model container [2020-12-23 00:39:03,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:39:03" (1/1) ... [2020-12-23 00:39:03,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:39:04,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:39:04,206 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-programs/partial_mod_count_1.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:39:04,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:39:04,238 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:39:04,252 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-programs/partial_mod_count_1.c[323,336] 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[4],IdentifierExpression[~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[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:39:04,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:39:04,277 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:39:04,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04 WrapperNode [2020-12-23 00:39:04,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:39:04,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:39:04,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:39:04,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:39:04,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:39:04,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:39:04,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:39:04,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:39:04,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... [2020-12-23 00:39:04,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:39:04,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:39:04,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:39:04,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:39:04,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:39:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:39:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:39:04,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:39:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:39:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:39:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:39:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:39:04,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:39:04,749 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:39:04,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:39:04 BoogieIcfgContainer [2020-12-23 00:39:04,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:39:04,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:39:04,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:39:04,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:39:04,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:39:03" (1/3) ... [2020-12-23 00:39:04,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33519570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:39:04, skipping insertion in model container [2020-12-23 00:39:04,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:04" (2/3) ... [2020-12-23 00:39:04,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33519570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:39:04, skipping insertion in model container [2020-12-23 00:39:04,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:39:04" (3/3) ... [2020-12-23 00:39:04,761 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2020-12-23 00:39:04,768 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:39:04,774 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:39:04,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:39:04,928 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:39:04,929 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:39:04,929 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:39:04,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:39:04,932 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:39:04,932 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:39:04,933 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:39:04,933 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:39:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 00:39:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:39:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:04,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:04,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-23 00:39:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635794335] [2020-12-23 00:39:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:05,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635794335] [2020-12-23 00:39:05,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:39:05,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:39:05,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430917560] [2020-12-23 00:39:05,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:39:05,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:39:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:39:05,305 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 00:39:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:05,326 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-23 00:39:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:39:05,328 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:39:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:05,346 INFO L225 Difference]: With dead ends: 29 [2020-12-23 00:39:05,347 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 00:39:05,351 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 [2020-12-23 00:39:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 00:39:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 00:39:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 00:39:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-23 00:39:05,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-23 00:39:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:05,394 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-23 00:39:05,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:39:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-23 00:39:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:39:05,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:05,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:05,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:39:05,398 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:05,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-23 00:39:05,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:05,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851533040] [2020-12-23 00:39:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851533040] [2020-12-23 00:39:05,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:39:05,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:39:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728338963] [2020-12-23 00:39:05,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:39:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:39:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:39:05,500 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-23 00:39:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:05,568 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-23 00:39:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:39:05,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 00:39:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:05,570 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:39:05,570 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:39:05,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:39:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:39:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-23 00:39:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:39:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 00:39:05,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-23 00:39:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:05,577 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 00:39:05,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:39:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 00:39:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:39:05,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:05,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:05,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:39:05,579 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:05,580 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-23 00:39:05,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:05,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732812330] [2020-12-23 00:39:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732812330] [2020-12-23 00:39:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748278269] [2020-12-23 00:39:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:39:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:05,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:05,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:39:05,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116439443] [2020-12-23 00:39:05,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:39:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:39:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:39:05,819 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-23 00:39:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:05,886 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-23 00:39:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:39:05,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 00:39:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:05,888 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:39:05,888 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:39:05,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:39:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:39:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-23 00:39:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:39:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 00:39:05,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-23 00:39:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:05,896 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 00:39:05,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:39:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 00:39:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:39:05,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:05,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:06,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:39:06,113 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:06,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-23 00:39:06,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:06,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127366452] [2020-12-23 00:39:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:06,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127366452] [2020-12-23 00:39:06,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392796064] [2020-12-23 00:39:06,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:06,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:39:06,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:06,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:39:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:06,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:06,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:39:06,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:39:06,554 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:06,563 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 00:39:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:39:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 00:39:06,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683641604] [2020-12-23 00:39:06,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:39:06,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:39:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:06,580 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-23 00:39:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:06,683 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:39:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:39:06,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 00:39:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:06,685 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:39:06,685 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:39:06,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:39:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:39:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 00:39:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:39:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 00:39:06,692 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-23 00:39:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:06,693 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 00:39:06,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:39:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 00:39:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:39:06,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:06,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:06,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:06,909 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-23 00:39:06,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:06,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438618708] [2020-12-23 00:39:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438618708] [2020-12-23 00:39:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333628075] [2020-12-23 00:39:06,983 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:39:07,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:07,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:07,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:39:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028504756] [2020-12-23 00:39:07,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:07,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:07,109 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-23 00:39:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:07,187 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-23 00:39:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:39:07,187 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 00:39:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:07,189 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:39:07,189 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:39:07,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:39:07,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-23 00:39:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:39:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 00:39:07,198 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-23 00:39:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:07,198 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 00:39:07,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 00:39:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:39:07,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:07,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:07,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:07,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-23 00:39:07,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:07,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216194651] [2020-12-23 00:39:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216194651] [2020-12-23 00:39:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166401160] [2020-12-23 00:39:07,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:07,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:07,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:07,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:39:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:07,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:07,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 00:39:07,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848465333] [2020-12-23 00:39:07,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:07,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:07,691 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-23 00:39:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:07,786 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-23 00:39:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:39:07,786 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-23 00:39:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:07,788 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:39:07,788 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:39:07,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:39:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-23 00:39:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:39:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 00:39:07,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-23 00:39:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:07,796 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 00:39:07,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 00:39:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:39:07,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:07,797 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:08,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:08,012 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-23 00:39:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:08,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254685291] [2020-12-23 00:39:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254685291] [2020-12-23 00:39:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733900686] [2020-12-23 00:39:08,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:08,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:39:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:39:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:39:08,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:08,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-23 00:39:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132633591] [2020-12-23 00:39:08,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:39:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:39:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:08,228 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-23 00:39:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:08,293 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-23 00:39:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:39:08,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 00:39:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:08,295 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:39:08,295 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 00:39:08,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 00:39:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-23 00:39:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:39:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-23 00:39:08,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-23 00:39:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:08,302 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-23 00:39:08,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:39:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-23 00:39:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:39:08,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:08,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:08,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:39:08,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-23 00:39:08,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:08,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805371623] [2020-12-23 00:39:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:08,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:08,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088598918] [2020-12-23 00:39:08,533 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:39:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:08,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805371623] [2020-12-23 00:39:08,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:08,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088598918] [2020-12-23 00:39:08,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:08,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:08,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623708695] [2020-12-23 00:39:08,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:08,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:08,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:08,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:08,729 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-23 00:39:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:08,850 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-23 00:39:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:08,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 00:39:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:08,853 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:39:08,853 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:39:08,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:39:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-23 00:39:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:39:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-23 00:39:08,862 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-23 00:39:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:08,863 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-23 00:39:08,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-23 00:39:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:39:08,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:08,864 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:09,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:09,078 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-23 00:39:09,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:09,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77063921] [2020-12-23 00:39:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:09,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:09,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501067577] [2020-12-23 00:39:09,106 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:09,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:09,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:39:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:09,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77063921] [2020-12-23 00:39:09,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501067577] [2020-12-23 00:39:09,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:09,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:39:09,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498458352] [2020-12-23 00:39:09,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:09,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:09,332 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-23 00:39:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:09,517 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-23 00:39:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:39:09,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-23 00:39:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:09,520 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:39:09,520 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:39:09,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:39:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-23 00:39:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:39:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-23 00:39:09,530 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-23 00:39:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:09,531 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-23 00:39:09,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-23 00:39:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:39:09,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:09,532 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:09,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:09,746 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:09,747 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-23 00:39:09,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:09,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085295879] [2020-12-23 00:39:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:09,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:09,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80238836] [2020-12-23 00:39:09,765 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:09,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:39:09,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:39:09,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:39:09,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085295879] [2020-12-23 00:39:09,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:09,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80238836] [2020-12-23 00:39:09,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:09,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:39:09,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853319879] [2020-12-23 00:39:09,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:39:09,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:39:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:39:09,964 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2020-12-23 00:39:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:10,064 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-23 00:39:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:10,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-23 00:39:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:10,066 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:39:10,066 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:39:10,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:39:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-23 00:39:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:39:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-23 00:39:10,075 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-23 00:39:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:10,075 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-23 00:39:10,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:39:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-23 00:39:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:39:10,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:10,077 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:10,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:39:10,292 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-23 00:39:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:10,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132834556] [2020-12-23 00:39:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:10,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:10,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029224713] [2020-12-23 00:39:10,314 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:10,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:39:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:39:10,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132834556] [2020-12-23 00:39:10,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029224713] [2020-12-23 00:39:10,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:10,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:39:10,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160897388] [2020-12-23 00:39:10,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:39:10,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:39:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:10,629 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-23 00:39:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:10,947 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-23 00:39:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:10,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 00:39:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:10,950 INFO L225 Difference]: With dead ends: 211 [2020-12-23 00:39:10,950 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 00:39:10,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:39:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 00:39:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-23 00:39:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:39:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-23 00:39:10,960 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-23 00:39:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:10,960 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-23 00:39:10,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:39:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-23 00:39:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:39:10,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:10,962 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:11,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:11,169 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-23 00:39:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:11,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027963888] [2020-12-23 00:39:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:11,186 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:11,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212960052] [2020-12-23 00:39:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:11,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:39:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:39:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:39:11,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027963888] [2020-12-23 00:39:11,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:11,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212960052] [2020-12-23 00:39:11,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:11,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:39:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804819527] [2020-12-23 00:39:11,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:39:11,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:39:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:39:11,751 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-23 00:39:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:11,974 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-23 00:39:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:11,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-23 00:39:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:11,977 INFO L225 Difference]: With dead ends: 314 [2020-12-23 00:39:11,977 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 00:39:11,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:39:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 00:39:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-23 00:39:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:39:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-23 00:39:11,988 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-23 00:39:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:11,989 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-23 00:39:11,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:39:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-23 00:39:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:39:11,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:11,990 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:12,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:12,200 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-23 00:39:12,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:12,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592679425] [2020-12-23 00:39:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:12,219 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:12,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621171802] [2020-12-23 00:39:12,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:12,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:39:12,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:39:12,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:39:12,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592679425] [2020-12-23 00:39:12,541 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:12,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621171802] [2020-12-23 00:39:12,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:12,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:12,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766108059] [2020-12-23 00:39:12,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:12,553 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-23 00:39:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:12,685 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-23 00:39:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:39:12,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:39:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:12,687 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:39:12,687 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:39:12,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:39:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-23 00:39:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:39:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-23 00:39:12,697 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-23 00:39:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:12,698 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-23 00:39:12,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-23 00:39:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:39:12,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:12,699 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:12,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:39:12,913 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-23 00:39:12,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:12,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208242527] [2020-12-23 00:39:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:12,950 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:12,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42047284] [2020-12-23 00:39:12,950 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:39:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:39:13,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208242527] [2020-12-23 00:39:13,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:13,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42047284] [2020-12-23 00:39:13,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:13,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:39:13,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537716042] [2020-12-23 00:39:13,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:39:13,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:39:13,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:13,338 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-23 00:39:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:13,625 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-23 00:39:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:39:13,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-23 00:39:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:13,628 INFO L225 Difference]: With dead ends: 450 [2020-12-23 00:39:13,628 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 00:39:13,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 00:39:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-23 00:39:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:39:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-23 00:39:13,641 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-23 00:39:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:13,641 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-23 00:39:13,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:39:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-23 00:39:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:39:13,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:13,643 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:13,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:39:13,858 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-23 00:39:13,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:13,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272917394] [2020-12-23 00:39:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:13,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:13,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415169124] [2020-12-23 00:39:13,877 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:13,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:39:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:39:14,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272917394] [2020-12-23 00:39:14,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:14,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415169124] [2020-12-23 00:39:14,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:14,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 00:39:14,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103882508] [2020-12-23 00:39:14,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:39:14,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:39:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:39:14,355 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-23 00:39:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:14,709 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-23 00:39:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:39:14,710 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-23 00:39:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:14,713 INFO L225 Difference]: With dead ends: 540 [2020-12-23 00:39:14,713 INFO L226 Difference]: Without dead ends: 504 [2020-12-23 00:39:14,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:39:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-23 00:39:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-23 00:39:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:39:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-23 00:39:14,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-23 00:39:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:14,731 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-23 00:39:14,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:39:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-23 00:39:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:39:14,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:14,732 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:14,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:39:14,936 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:14,937 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-23 00:39:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:14,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151054635] [2020-12-23 00:39:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:14,954 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:14,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845805160] [2020-12-23 00:39:14,955 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:15,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:39:15,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:15,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:39:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:39:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151054635] [2020-12-23 00:39:15,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845805160] [2020-12-23 00:39:15,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:15,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:39:15,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401640780] [2020-12-23 00:39:15,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:39:15,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:39:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:15,230 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-23 00:39:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:15,381 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-23 00:39:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:39:15,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-23 00:39:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:15,383 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:39:15,383 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:39:15,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:39:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:39:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-23 00:39:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 00:39:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-23 00:39:15,393 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-23 00:39:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:15,393 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-23 00:39:15,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:39:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-23 00:39:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:39:15,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:15,394 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:15,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:15,608 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-23 00:39:15,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:15,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151451840] [2020-12-23 00:39:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:15,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:15,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423156350] [2020-12-23 00:39:15,628 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:15,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:15,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:15,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:39:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:39:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151451840] [2020-12-23 00:39:16,249 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423156350] [2020-12-23 00:39:16,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:39:16,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541794475] [2020-12-23 00:39:16,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:39:16,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:39:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:39:16,251 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-23 00:39:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:17,050 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-23 00:39:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:39:17,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-23 00:39:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:17,054 INFO L225 Difference]: With dead ends: 580 [2020-12-23 00:39:17,054 INFO L226 Difference]: Without dead ends: 547 [2020-12-23 00:39:17,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:39:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-23 00:39:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-23 00:39:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:39:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-23 00:39:17,067 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-23 00:39:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:17,067 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-23 00:39:17,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:39:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-23 00:39:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:39:17,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:17,069 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:17,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:39:17,283 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-23 00:39:17,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:17,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948444651] [2020-12-23 00:39:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:17,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:17,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260085624] [2020-12-23 00:39:17,303 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:18,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:39:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:18,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:39:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:39:18,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948444651] [2020-12-23 00:39:18,706 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:18,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260085624] [2020-12-23 00:39:18,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:18,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:39:18,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644268548] [2020-12-23 00:39:18,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:39:18,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:18,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:39:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:39:18,709 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-23 00:39:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:19,193 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-23 00:39:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:39:19,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-23 00:39:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:19,198 INFO L225 Difference]: With dead ends: 757 [2020-12-23 00:39:19,198 INFO L226 Difference]: Without dead ends: 713 [2020-12-23 00:39:19,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:39:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-23 00:39:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-23 00:39:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:39:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-23 00:39:19,214 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-23 00:39:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:19,214 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-23 00:39:19,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:39:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-23 00:39:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:39:19,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:19,216 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:19,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:39:19,423 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-23 00:39:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122400032] [2020-12-23 00:39:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:19,446 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:19,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085726977] [2020-12-23 00:39:19,447 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:19,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:39:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:39:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-23 00:39:19,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122400032] [2020-12-23 00:39:19,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:19,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085726977] [2020-12-23 00:39:19,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:19,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:39:19,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343691114] [2020-12-23 00:39:19,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:19,988 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-23 00:39:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:20,178 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-23 00:39:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:39:20,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-23 00:39:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:20,182 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:39:20,182 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 00:39:20,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 00:39:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-23 00:39:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:39:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-23 00:39:20,206 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-23 00:39:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:20,206 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-23 00:39:20,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-23 00:39:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:39:20,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:20,208 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:20,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:20,421 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-23 00:39:20,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:20,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658088271] [2020-12-23 00:39:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:20,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:20,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650029907] [2020-12-23 00:39:20,460 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:39:20,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:39:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658088271] [2020-12-23 00:39:21,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650029907] [2020-12-23 00:39:21,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:21,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 00:39:21,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290240863] [2020-12-23 00:39:21,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:39:21,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:39:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:39:21,300 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-23 00:39:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:21,872 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-23 00:39:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:39:21,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-23 00:39:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:21,878 INFO L225 Difference]: With dead ends: 1003 [2020-12-23 00:39:21,879 INFO L226 Difference]: Without dead ends: 954 [2020-12-23 00:39:21,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:39:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-23 00:39:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-23 00:39:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 00:39:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-23 00:39:21,898 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-23 00:39:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:21,899 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-23 00:39:21,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:39:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-23 00:39:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:39:21,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:21,900 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:22,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:22,116 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-23 00:39:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:22,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726464615] [2020-12-23 00:39:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:22,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:22,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075385178] [2020-12-23 00:39:22,138 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:22,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:39:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:39:23,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726464615] [2020-12-23 00:39:23,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:23,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075385178] [2020-12-23 00:39:23,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:23,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 00:39:23,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069873418] [2020-12-23 00:39:23,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:39:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:39:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:39:23,196 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-23 00:39:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:23,941 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-23 00:39:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:39:23,942 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-23 00:39:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:23,947 INFO L225 Difference]: With dead ends: 1163 [2020-12-23 00:39:23,947 INFO L226 Difference]: Without dead ends: 1114 [2020-12-23 00:39:23,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:39:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-23 00:39:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-23 00:39:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:39:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-23 00:39:23,968 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-23 00:39:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:23,969 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-23 00:39:23,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:39:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-23 00:39:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 00:39:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:23,971 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:24,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:24,184 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-23 00:39:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:24,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924260759] [2020-12-23 00:39:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:24,206 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:24,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087229922] [2020-12-23 00:39:24,207 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:24,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:39:24,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:24,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:39:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-23 00:39:24,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924260759] [2020-12-23 00:39:24,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:24,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087229922] [2020-12-23 00:39:24,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:24,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:39:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079689163] [2020-12-23 00:39:24,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:39:24,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:24,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:39:24,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:39:24,814 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-23 00:39:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:25,017 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-23 00:39:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:39:25,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-23 00:39:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:25,019 INFO L225 Difference]: With dead ends: 149 [2020-12-23 00:39:25,019 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:39:25,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:39:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:39:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-23 00:39:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:39:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-23 00:39:25,035 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-23 00:39:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:25,036 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-23 00:39:25,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:39:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-23 00:39:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:39:25,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:25,038 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:25,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:39:25,252 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-23 00:39:25,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:25,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699905548] [2020-12-23 00:39:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:25,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:25,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300720189] [2020-12-23 00:39:25,292 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:25,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:39:25,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-23 00:39:26,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699905548] [2020-12-23 00:39:26,596 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:26,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300720189] [2020-12-23 00:39:26,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:26,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 00:39:26,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501264354] [2020-12-23 00:39:26,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:39:26,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:26,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:39:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:39:26,599 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-23 00:39:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:28,049 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-23 00:39:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:39:28,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-23 00:39:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:28,055 INFO L225 Difference]: With dead ends: 1247 [2020-12-23 00:39:28,056 INFO L226 Difference]: Without dead ends: 1204 [2020-12-23 00:39:28,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:39:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-23 00:39:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-23 00:39:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:39:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-23 00:39:28,080 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-23 00:39:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:28,080 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-23 00:39:28,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:39:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-23 00:39:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 00:39:28,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:28,082 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:28,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:39:28,297 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-23 00:39:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:28,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648779035] [2020-12-23 00:39:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:28,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:28,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134856894] [2020-12-23 00:39:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:36,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 00:39:36,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:39:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-23 00:39:38,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648779035] [2020-12-23 00:39:38,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:38,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134856894] [2020-12-23 00:39:38,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:38,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 00:39:38,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766769449] [2020-12-23 00:39:38,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:39:38,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:38,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:39:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:39:38,192 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-23 00:39:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:39,065 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-23 00:39:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:39:39,070 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-23 00:39:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:39,077 INFO L225 Difference]: With dead ends: 1515 [2020-12-23 00:39:39,077 INFO L226 Difference]: Without dead ends: 1458 [2020-12-23 00:39:39,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:39:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-23 00:39:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-23 00:39:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:39:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-23 00:39:39,109 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-23 00:39:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:39,109 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-23 00:39:39,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:39:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-23 00:39:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:39:39,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:39,111 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:39,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:39,325 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-23 00:39:39,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:39,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479964093] [2020-12-23 00:39:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:39,349 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:39,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760354936] [2020-12-23 00:39:39,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:39,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:39:39,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:39:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-12-23 00:39:39,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479964093] [2020-12-23 00:39:39,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760354936] [2020-12-23 00:39:39,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:39,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:39:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688810972] [2020-12-23 00:39:39,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:39:39,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:39,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:39:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:39,951 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-23 00:39:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:40,213 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-23 00:39:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:40,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-23 00:39:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:40,215 INFO L225 Difference]: With dead ends: 172 [2020-12-23 00:39:40,215 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:39:40,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:39:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:39:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-23 00:39:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 00:39:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-23 00:39:40,236 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-23 00:39:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:40,236 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-23 00:39:40,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:39:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-23 00:39:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 00:39:40,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:40,238 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:40,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:39:40,454 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-23 00:39:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:40,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891046323] [2020-12-23 00:39:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:40,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:40,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103516030] [2020-12-23 00:39:40,477 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:40,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:39:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:39:42,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891046323] [2020-12-23 00:39:42,085 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:42,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103516030] [2020-12-23 00:39:42,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:42,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 00:39:42,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118039865] [2020-12-23 00:39:42,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:39:42,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:39:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:39:42,088 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-23 00:39:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:43,323 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-23 00:39:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:39:43,324 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-23 00:39:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:43,333 INFO L225 Difference]: With dead ends: 1906 [2020-12-23 00:39:43,334 INFO L226 Difference]: Without dead ends: 1844 [2020-12-23 00:39:43,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:39:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-23 00:39:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-23 00:39:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 00:39:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-23 00:39:43,371 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-23 00:39:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:43,371 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-23 00:39:43,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:39:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-23 00:39:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 00:39:43,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:43,373 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:43,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:43,587 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-23 00:39:43,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:43,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98142959] [2020-12-23 00:39:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:43,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:43,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911718139] [2020-12-23 00:39:43,611 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:43,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:39:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:39:45,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98142959] [2020-12-23 00:39:45,646 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:45,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911718139] [2020-12-23 00:39:45,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:45,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-23 00:39:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057482093] [2020-12-23 00:39:45,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:39:45,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:39:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:39:45,653 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-23 00:39:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:46,991 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-23 00:39:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:39:46,992 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-23 00:39:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:47,001 INFO L225 Difference]: With dead ends: 2156 [2020-12-23 00:39:47,001 INFO L226 Difference]: Without dead ends: 2094 [2020-12-23 00:39:47,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:39:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-23 00:39:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-23 00:39:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 00:39:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-23 00:39:47,040 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-23 00:39:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:47,040 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-23 00:39:47,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:39:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-23 00:39:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 00:39:47,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:47,043 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:47,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:39:47,257 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-23 00:39:47,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:47,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811195090] [2020-12-23 00:39:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:47,284 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:47,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476545952] [2020-12-23 00:39:47,285 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:47,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:39:47,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:39:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2020-12-23 00:39:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811195090] [2020-12-23 00:39:47,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476545952] [2020-12-23 00:39:47,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:47,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952618239] [2020-12-23 00:39:47,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:47,937 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-23 00:39:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:48,133 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-23 00:39:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:48,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-23 00:39:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:48,135 INFO L225 Difference]: With dead ends: 371 [2020-12-23 00:39:48,135 INFO L226 Difference]: Without dead ends: 323 [2020-12-23 00:39:48,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-23 00:39:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-23 00:39:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 00:39:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-23 00:39:48,164 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-23 00:39:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:48,164 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-23 00:39:48,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-23 00:39:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 00:39:48,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:48,165 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:48,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:39:48,366 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:48,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-23 00:39:48,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:48,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129169475] [2020-12-23 00:39:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:48,393 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:48,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524374141] [2020-12-23 00:39:48,393 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:48,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:48,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:48,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 00:39:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:39:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129169475] [2020-12-23 00:39:50,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524374141] [2020-12-23 00:39:50,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 00:39:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283768627] [2020-12-23 00:39:50,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 00:39:50,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 00:39:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:39:50,867 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-23 00:39:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:54,749 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-23 00:39:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:39:54,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-23 00:39:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:54,757 INFO L225 Difference]: With dead ends: 2137 [2020-12-23 00:39:54,757 INFO L226 Difference]: Without dead ends: 2089 [2020-12-23 00:39:54,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 00:39:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-23 00:39:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-23 00:39:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 00:39:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-23 00:39:54,799 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-23 00:39:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:54,800 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-23 00:39:54,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 00:39:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-23 00:39:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 00:39:54,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:54,801 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:55,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:39:55,015 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-23 00:39:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:55,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492531897] [2020-12-23 00:39:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:55,041 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:55,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222416580] [2020-12-23 00:39:55,042 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true