/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-examples/standard_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:47:03,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:47:03,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:47:03,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:47:03,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:47:03,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:47:03,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:47:03,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:47:03,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:47:03,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:47:03,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:47:03,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:47:03,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:47:03,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:47:03,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:47:03,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:47:03,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:47:03,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:47:03,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:47:03,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:47:03,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:47:03,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:47:03,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:47:03,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:47:03,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:47:03,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:47:03,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:47:03,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:47:03,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:47:03,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:47:03,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:47:03,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:47:03,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:47:03,286 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:47:03,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:47:03,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:47:03,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:47:03,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:47:03,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:47:03,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:47:03,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:47:03,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:47:03,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:47:03,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:47:03,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:47:03,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:47:03,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:03,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:47:03,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:47:03,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:47:03,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:47:03,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:47:03,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:47:03,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:47:03,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:47:03,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:47:03,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:47:03,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:47:03,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:47:03,739 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:47:03,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2021-01-06 09:47:03,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6faca7297/71ff0aadf8ba446fa1113c1de9b0458c/FLAGe56e9ab27 [2021-01-06 09:47:04,490 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:47:04,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2021-01-06 09:47:04,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6faca7297/71ff0aadf8ba446fa1113c1de9b0458c/FLAGe56e9ab27 [2021-01-06 09:47:04,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6faca7297/71ff0aadf8ba446fa1113c1de9b0458c [2021-01-06 09:47:04,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:47:04,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:47:04,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:04,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:47:04,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:47:04,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:04" (1/1) ... [2021-01-06 09:47:04,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cf952f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:04, skipping insertion in model container [2021-01-06 09:47:04,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:04" (1/1) ... [2021-01-06 09:47:04,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:47:04,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:47:05,098 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-examples/standard_copyInitSum2_ground-1.i[823,836] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] 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: VariableLHS[~x~0,] [2021-01-06 09:47:05,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:05,132 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:47:05,148 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-examples/standard_copyInitSum2_ground-1.i[823,836] 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,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] 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: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:05,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:05,177 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:47:05,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05 WrapperNode [2021-01-06 09:47:05,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:05,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:05,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:47:05,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:47:05,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:05,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:47:05,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:47:05,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:47:05,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... [2021-01-06 09:47:05,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:47:05,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:47:05,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:47:05,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:47:05,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:47:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:47:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:47:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:47:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:47:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:47:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:47:05,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:47:05,679 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 09:47:05,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:05 BoogieIcfgContainer [2021-01-06 09:47:05,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:47:05,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:47:05,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:47:05,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:47:05,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:47:04" (1/3) ... [2021-01-06 09:47:05,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160e81fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:05, skipping insertion in model container [2021-01-06 09:47:05,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:05" (2/3) ... [2021-01-06 09:47:05,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160e81fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:05, skipping insertion in model container [2021-01-06 09:47:05,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:05" (3/3) ... [2021-01-06 09:47:05,692 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2021-01-06 09:47:05,702 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:47:05,708 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:47:05,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:47:05,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:47:05,767 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:47:05,767 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:47:05,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:47:05,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:47:05,768 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:47:05,768 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:47:05,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:47:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 09:47:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:47:05,845 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:05,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:05,847 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:05,862 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2021-01-06 09:47:05,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:05,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262076460] [2021-01-06 09:47:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:06,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262076460] [2021-01-06 09:47:06,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:47:06,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:47:06,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370507040] [2021-01-06 09:47:06,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:47:06,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:06,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:47:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:06,215 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-01-06 09:47:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:06,290 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-01-06 09:47:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:47:06,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:47:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:06,302 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:47:06,302 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 09:47:06,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 09:47:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-01-06 09:47:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:47:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 09:47:06,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-01-06 09:47:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:06,346 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 09:47:06,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:47:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 09:47:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 09:47:06,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:06,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:06,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:47:06,348 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2021-01-06 09:47:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:06,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737822227] [2021-01-06 09:47:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:47:06,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737822227] [2021-01-06 09:47:06,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692433372] [2021-01-06 09:47:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:06,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:47:06,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:47:06,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:06,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:47:06,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008454871] [2021-01-06 09:47:06,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:47:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:06,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:47:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:06,582 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2021-01-06 09:47:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:06,730 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 09:47:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:47:06,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 09:47:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:06,733 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:47:06,733 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:47:06,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:47:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-01-06 09:47:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:47:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 09:47:06,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2021-01-06 09:47:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:06,749 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 09:47:06,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:47:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 09:47:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:47:06,750 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:06,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:06,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:47:06,965 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:06,966 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2021-01-06 09:47:06,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:06,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525285229] [2021-01-06 09:47:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:47:07,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525285229] [2021-01-06 09:47:07,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537007697] [2021-01-06 09:47:07,057 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 [2021-01-06 09:47:07,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:07,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:47:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:47:07,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:07,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:47:07,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72352404] [2021-01-06 09:47:07,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:47:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:47:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:07,240 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2021-01-06 09:47:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:07,355 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-01-06 09:47:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:47:07,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 09:47:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:07,357 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:47:07,357 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:47:07,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:47:07,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 09:47:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:47:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-01-06 09:47:07,365 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2021-01-06 09:47:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:07,365 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-01-06 09:47:07,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:47:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-01-06 09:47:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:47:07,367 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:07,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:07,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:07,582 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2021-01-06 09:47:07,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:07,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925898660] [2021-01-06 09:47:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:47:07,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925898660] [2021-01-06 09:47:07,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101009931] [2021-01-06 09:47:07,691 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:07,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:47:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:47:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:47:07,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:07,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:47:07,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880437145] [2021-01-06 09:47:07,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:47:07,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:47:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:07,851 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2021-01-06 09:47:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:07,994 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-01-06 09:47:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:47:07,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 09:47:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:07,999 INFO L225 Difference]: With dead ends: 59 [2021-01-06 09:47:07,999 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:47:08,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:47:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-01-06 09:47:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:47:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-01-06 09:47:08,013 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-01-06 09:47:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:08,013 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-01-06 09:47:08,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:47:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-01-06 09:47:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:47:08,015 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:08,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:08,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:08,232 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2021-01-06 09:47:08,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:08,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126150836] [2021-01-06 09:47:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 09:47:08,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126150836] [2021-01-06 09:47:08,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807169870] [2021-01-06 09:47:08,379 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:08,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:47:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 09:47:08,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:08,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:47:08,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567005759] [2021-01-06 09:47:08,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:47:08,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:47:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:08,561 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2021-01-06 09:47:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:08,692 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 09:47:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:47:08,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-01-06 09:47:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:08,694 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:47:08,695 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:47:08,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:47:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-01-06 09:47:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:47:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-01-06 09:47:08,702 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-01-06 09:47:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:08,702 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-01-06 09:47:08,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:47:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-01-06 09:47:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:47:08,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:08,704 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:08,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:08,919 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2021-01-06 09:47:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:08,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201277164] [2021-01-06 09:47:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 09:47:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201277164] [2021-01-06 09:47:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067555635] [2021-01-06 09:47:09,075 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:09,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:47:09,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:47:09,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 09:47:09,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:09,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:47:09,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587046675] [2021-01-06 09:47:09,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:47:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:47:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:09,489 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2021-01-06 09:47:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:09,591 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-01-06 09:47:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:47:09,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-01-06 09:47:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:09,594 INFO L225 Difference]: With dead ends: 77 [2021-01-06 09:47:09,594 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:47:09,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:47:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-01-06 09:47:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:47:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 09:47:09,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-01-06 09:47:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:09,611 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 09:47:09,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:47:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 09:47:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:47:09,615 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:09,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:09,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:47:09,829 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:09,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2021-01-06 09:47:09,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:09,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112470730] [2021-01-06 09:47:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:47:09,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112470730] [2021-01-06 09:47:09,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326635675] [2021-01-06 09:47:09,979 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:47:10,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:47:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 09:47:10,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:10,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:47:10,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683914218] [2021-01-06 09:47:10,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:47:10,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:47:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:10,416 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 10 states. [2021-01-06 09:47:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:10,510 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 09:47:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:47:10,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2021-01-06 09:47:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:10,511 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:47:10,511 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 09:47:10,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 09:47:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-01-06 09:47:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 09:47:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-01-06 09:47:10,519 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2021-01-06 09:47:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:10,519 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-01-06 09:47:10,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:47:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-01-06 09:47:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:47:10,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:10,520 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:10,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,736 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -700601765, now seen corresponding path program 7 times [2021-01-06 09:47:10,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:10,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691476724] [2021-01-06 09:47:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 09:47:10,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691476724] [2021-01-06 09:47:10,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788450258] [2021-01-06 09:47:10,910 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:47:10,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 09:47:11,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:11,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:47:11,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13604558] [2021-01-06 09:47:11,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:11,065 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 11 states. [2021-01-06 09:47:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:11,185 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2021-01-06 09:47:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:47:11,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 09:47:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:11,186 INFO L225 Difference]: With dead ends: 95 [2021-01-06 09:47:11,186 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:47:11,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:47:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-01-06 09:47:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:47:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-01-06 09:47:11,193 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2021-01-06 09:47:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:11,194 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-01-06 09:47:11,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-01-06 09:47:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:47:11,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:11,195 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:11,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:11,404 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:11,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:11,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 8 times [2021-01-06 09:47:11,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:11,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274916450] [2021-01-06 09:47:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274916450] [2021-01-06 09:47:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42014577] [2021-01-06 09:47:11,547 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:11,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:47:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:11,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:11,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:47:11,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656551279] [2021-01-06 09:47:11,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:47:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:47:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:11,771 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2021-01-06 09:47:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:11,883 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-01-06 09:47:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:47:11,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-01-06 09:47:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:11,884 INFO L225 Difference]: With dead ends: 104 [2021-01-06 09:47:11,884 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:47:11,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:47:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-01-06 09:47:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:47:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 09:47:11,891 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2021-01-06 09:47:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:11,891 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 09:47:11,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:47:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 09:47:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:47:11,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:11,893 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:12,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:47:12,099 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:12,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:12,100 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 9 times [2021-01-06 09:47:12,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:12,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42906757] [2021-01-06 09:47:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:47:12,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42906757] [2021-01-06 09:47:12,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466786525] [2021-01-06 09:47:12,245 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:12,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:47:12,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:47:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:47:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:12,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:47:12,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325974173] [2021-01-06 09:47:12,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:47:12,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:47:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:12,809 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2021-01-06 09:47:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:12,928 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-01-06 09:47:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:47:12,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2021-01-06 09:47:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:12,929 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:47:12,930 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:47:12,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:47:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 09:47:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:47:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-01-06 09:47:12,937 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2021-01-06 09:47:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:12,938 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-01-06 09:47:12,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:47:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-01-06 09:47:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:47:12,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:12,939 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:13,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 10 times [2021-01-06 09:47:13,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:13,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284664956] [2021-01-06 09:47:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:13,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284664956] [2021-01-06 09:47:13,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669878465] [2021-01-06 09:47:13,346 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:13,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:47:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 09:47:13,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:13,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:47:13,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142674652] [2021-01-06 09:47:13,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:47:13,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:47:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:13,582 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2021-01-06 09:47:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:13,716 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-01-06 09:47:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:47:13,717 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2021-01-06 09:47:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:13,717 INFO L225 Difference]: With dead ends: 122 [2021-01-06 09:47:13,718 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:47:13,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:47:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-01-06 09:47:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 09:47:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-01-06 09:47:13,725 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-01-06 09:47:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:13,725 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-01-06 09:47:13,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:47:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-01-06 09:47:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 09:47:13,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:13,726 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:13,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,941 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 11 times [2021-01-06 09:47:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:13,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988668142] [2021-01-06 09:47:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 09:47:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988668142] [2021-01-06 09:47:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300915855] [2021-01-06 09:47:14,095 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:29,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:47:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:47:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 09:47:29,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:29,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:47:29,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730572091] [2021-01-06 09:47:29,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:47:29,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:29,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:47:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:29,552 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2021-01-06 09:47:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:29,698 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-01-06 09:47:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:47:29,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-01-06 09:47:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:29,700 INFO L225 Difference]: With dead ends: 131 [2021-01-06 09:47:29,701 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:47:29,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:47:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-01-06 09:47:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:47:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-01-06 09:47:29,708 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2021-01-06 09:47:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:29,708 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-01-06 09:47:29,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:47:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-01-06 09:47:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:47:29,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:29,710 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:29,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:47:29,911 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 12 times [2021-01-06 09:47:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:29,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510946503] [2021-01-06 09:47:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:47:30,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510946503] [2021-01-06 09:47:30,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654887216] [2021-01-06 09:47:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:39,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:47:39,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:39,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 09:47:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 09:47:40,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:40,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:47:40,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383244286] [2021-01-06 09:47:40,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:47:40,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:47:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:40,027 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 16 states. [2021-01-06 09:47:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:40,172 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-01-06 09:47:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:47:40,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2021-01-06 09:47:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:40,173 INFO L225 Difference]: With dead ends: 140 [2021-01-06 09:47:40,173 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 09:47:40,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 09:47:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-01-06 09:47:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 09:47:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-01-06 09:47:40,180 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2021-01-06 09:47:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:40,180 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-01-06 09:47:40,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:47:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-01-06 09:47:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 09:47:40,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:40,181 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:40,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:47:40,395 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 13 times [2021-01-06 09:47:40,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:40,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216285022] [2021-01-06 09:47:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:47:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216285022] [2021-01-06 09:47:40,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049654651] [2021-01-06 09:47:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:47:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:47:40,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:40,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:47:40,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775036457] [2021-01-06 09:47:40,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:47:40,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:47:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:40,778 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2021-01-06 09:47:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:40,953 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-01-06 09:47:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:47:40,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 09:47:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:40,954 INFO L225 Difference]: With dead ends: 149 [2021-01-06 09:47:40,954 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:47:40,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:47:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-01-06 09:47:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:47:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-01-06 09:47:40,960 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2021-01-06 09:47:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:40,960 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-01-06 09:47:40,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:47:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-01-06 09:47:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:47:40,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:40,961 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:41,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:47:41,176 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 14 times [2021-01-06 09:47:41,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:41,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435457383] [2021-01-06 09:47:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:41,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435457383] [2021-01-06 09:47:41,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067887095] [2021-01-06 09:47:41,380 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:41,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:41,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:47:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:41,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:41,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:47:41,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078395264] [2021-01-06 09:47:41,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:47:41,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:41,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:47:41,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:41,585 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2021-01-06 09:47:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:41,750 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-01-06 09:47:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:47:41,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2021-01-06 09:47:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:41,752 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:47:41,753 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:47:41,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:47:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-01-06 09:47:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 09:47:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-01-06 09:47:41,762 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2021-01-06 09:47:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:41,763 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-01-06 09:47:41,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:47:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-01-06 09:47:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 09:47:41,764 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:41,764 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:41,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,981 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 15 times [2021-01-06 09:47:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:41,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033174746] [2021-01-06 09:47:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-01-06 09:47:42,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033174746] [2021-01-06 09:47:42,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116863776] [2021-01-06 09:47:42,190 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 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 [2021-01-06 09:47:46,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:47:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:47:46,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-01-06 09:47:46,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:46,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:47:46,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928083438] [2021-01-06 09:47:46,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:47:46,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:47:46,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:46,254 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2021-01-06 09:47:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:46,466 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-01-06 09:47:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:47:46,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2021-01-06 09:47:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:46,467 INFO L225 Difference]: With dead ends: 167 [2021-01-06 09:47:46,467 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 09:47:46,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 09:47:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-01-06 09:47:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:47:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-01-06 09:47:46,473 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2021-01-06 09:47:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:46,473 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-01-06 09:47:46,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:47:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-01-06 09:47:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:47:46,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:46,474 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:46,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:47:46,689 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 16 times [2021-01-06 09:47:46,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:46,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778435137] [2021-01-06 09:47:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-01-06 09:47:46,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778435137] [2021-01-06 09:47:46,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978300563] [2021-01-06 09:47:46,926 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 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 [2021-01-06 09:47:47,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:47,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:47:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:47,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:47,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:47:47,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913301872] [2021-01-06 09:47:47,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:47:47,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:47,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:47:47,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:47,137 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2021-01-06 09:47:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:47,328 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2021-01-06 09:47:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:47:47,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2021-01-06 09:47:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:47,329 INFO L225 Difference]: With dead ends: 176 [2021-01-06 09:47:47,329 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 09:47:47,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 09:47:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-01-06 09:47:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 09:47:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-01-06 09:47:47,335 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2021-01-06 09:47:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:47,335 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-01-06 09:47:47,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:47:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-01-06 09:47:47,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:47:47,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:47,337 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:47,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:47:47,550 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 17 times [2021-01-06 09:47:47,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:47,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324699036] [2021-01-06 09:47:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-01-06 09:47:47,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324699036] [2021-01-06 09:47:47,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227244156] [2021-01-06 09:47:47,827 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 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