/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_find_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:57:48,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:57:48,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:57:48,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:57:48,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:57:48,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:57:48,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:57:48,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:57:48,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:57:48,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:57:48,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:57:48,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:57:48,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:57:48,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:57:48,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:57:48,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:57:48,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:57:48,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:57:48,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:57:48,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:57:48,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:57:48,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:57:48,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:57:48,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:57:48,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:57:48,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:57:48,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:57:48,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:57:48,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:57:48,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:57:48,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:57:48,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:57:48,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:57:48,321 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:57:48,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:57:48,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:57:48,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:57:48,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:57:48,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:57:48,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:57:48,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:57:48,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:57:48,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:57:48,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:57:48,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:57:48,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:57:48,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:57:48,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:57:48,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:57:48,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:57:48,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:57:48,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:57:48,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:57:48,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:57:48,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:57:48,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:57:48,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:57:48,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:57:48,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:57:48,869 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:57:48,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_find_ground-1.i [2020-12-22 23:57:48,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7e75b43fb/539387f0e1ab400c9f81c5799772e29e/FLAG2b8242e77 [2020-12-22 23:57:49,720 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:57:49,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_find_ground-1.i [2020-12-22 23:57:49,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7e75b43fb/539387f0e1ab400c9f81c5799772e29e/FLAG2b8242e77 [2020-12-22 23:57:50,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7e75b43fb/539387f0e1ab400c9f81c5799772e29e [2020-12-22 23:57:50,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:57:50,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:57:50,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:57:50,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:57:50,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:57:50,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476b1c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50, skipping insertion in model container [2020-12-22 23:57:50,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:57:50,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:57:50,293 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_find_ground-1.i[855,868] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:57:50,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:57:50,322 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:57:50,336 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_find_ground-1.i[855,868] left hand side expression in assignment: lhs: VariableLHS[~j~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[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:57:50,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:57:50,361 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:57:50,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50 WrapperNode [2020-12-22 23:57:50,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:57:50,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:57:50,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:57:50,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:57:50,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:57:50,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:57:50,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:57:50,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:57:50,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... [2020-12-22 23:57:50,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:57:50,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:57:50,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:57:50,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:57:50,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:57:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:57:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:57:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:57:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:57:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:57:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:57:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:57:50,874 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:57:50,874 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 23:57:50,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:57:50 BoogieIcfgContainer [2020-12-22 23:57:50,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:57:50,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:57:50,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:57:50,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:57:50,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:57:50" (1/3) ... [2020-12-22 23:57:50,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4982b05c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:57:50, skipping insertion in model container [2020-12-22 23:57:50,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:57:50" (2/3) ... [2020-12-22 23:57:50,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4982b05c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:57:50, skipping insertion in model container [2020-12-22 23:57:50,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:57:50" (3/3) ... [2020-12-22 23:57:50,898 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.i [2020-12-22 23:57:50,913 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:57:50,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:57:50,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:57:50,999 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:57:50,999 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:57:50,999 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:57:50,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:57:51,000 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:57:51,000 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:57:51,000 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:57:51,000 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:57:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-22 23:57:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 23:57:51,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:51,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:51,037 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:51,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:51,047 INFO L82 PathProgramCache]: Analyzing trace with hash 227193477, now seen corresponding path program 1 times [2020-12-22 23:57:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:51,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181883273] [2020-12-22 23:57:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181883273] [2020-12-22 23:57:51,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:57:51,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 23:57:51,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485119495] [2020-12-22 23:57:51,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 23:57:51,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 23:57:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 23:57:51,298 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-22 23:57:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:51,317 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2020-12-22 23:57:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 23:57:51,318 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 23:57:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:51,329 INFO L225 Difference]: With dead ends: 32 [2020-12-22 23:57:51,329 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 23:57:51,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 23:57:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 23:57:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 23:57:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 23:57:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-22 23:57:51,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2020-12-22 23:57:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:51,373 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-22 23:57:51,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 23:57:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-22 23:57:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:57:51,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:51,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:51,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:57:51,375 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 280143166, now seen corresponding path program 1 times [2020-12-22 23:57:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:51,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925603450] [2020-12-22 23:57:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:51,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925603450] [2020-12-22 23:57:51,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:57:51,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:57:51,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068690826] [2020-12-22 23:57:51,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:57:51,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:51,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:57:51,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:57:51,470 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-12-22 23:57:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:51,519 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-12-22 23:57:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:57:51,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 23:57:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:51,524 INFO L225 Difference]: With dead ends: 26 [2020-12-22 23:57:51,524 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 23:57:51,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:57:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 23:57:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 23:57:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 23:57:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-22 23:57:51,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2020-12-22 23:57:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:51,537 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-22 23:57:51,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:57:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-22 23:57:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:57:51,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:51,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:51,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 23:57:51,541 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:51,543 INFO L82 PathProgramCache]: Analyzing trace with hash -375054400, now seen corresponding path program 1 times [2020-12-22 23:57:51,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:51,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90420097] [2020-12-22 23:57:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:51,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90420097] [2020-12-22 23:57:51,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125433812] [2020-12-22 23:57:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:57:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:57:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:51,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:57:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779799268] [2020-12-22 23:57:51,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:57:51,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:51,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:57:51,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:51,881 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2020-12-22 23:57:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:51,917 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-22 23:57:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:57:51,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 23:57:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:51,919 INFO L225 Difference]: With dead ends: 28 [2020-12-22 23:57:51,919 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 23:57:51,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 23:57:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 23:57:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 23:57:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-22 23:57:51,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2020-12-22 23:57:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:51,925 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-22 23:57:51,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:57:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-22 23:57:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:57:51,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:51,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:52,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 23:57:52,140 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1340277186, now seen corresponding path program 2 times [2020-12-22 23:57:52,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:52,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830636954] [2020-12-22 23:57:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:57:52,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830636954] [2020-12-22 23:57:52,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:57:52,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:57:52,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275813250] [2020-12-22 23:57:52,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:57:52,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:57:52,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:57:52,215 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2020-12-22 23:57:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:52,243 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-22 23:57:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:57:52,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 23:57:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:52,245 INFO L225 Difference]: With dead ends: 28 [2020-12-22 23:57:52,245 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 23:57:52,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:57:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 23:57:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 23:57:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 23:57:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 23:57:52,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2020-12-22 23:57:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:52,251 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 23:57:52,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:57:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 23:57:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:57:52,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:52,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:52,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 23:57:52,253 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash 356036201, now seen corresponding path program 1 times [2020-12-22 23:57:52,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:52,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742673159] [2020-12-22 23:57:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:52,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742673159] [2020-12-22 23:57:52,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154178507] [2020-12-22 23:57:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:52,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:57:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:52,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 23:57:52,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946627165] [2020-12-22 23:57:52,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:57:52,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:57:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:57:52,516 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2020-12-22 23:57:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:52,555 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-12-22 23:57:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 23:57:52,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-22 23:57:52,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:52,557 INFO L225 Difference]: With dead ends: 36 [2020-12-22 23:57:52,557 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 23:57:52,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:57:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 23:57:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 23:57:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 23:57:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-22 23:57:52,563 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2020-12-22 23:57:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:52,563 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-22 23:57:52,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:57:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-22 23:57:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:57:52,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:52,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:52,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:52,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1212039769, now seen corresponding path program 2 times [2020-12-22 23:57:52,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:52,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102331528] [2020-12-22 23:57:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:52,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102331528] [2020-12-22 23:57:52,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304338320] [2020-12-22 23:57:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:52,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:52,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:57:52,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:53,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:53,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:57:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781749145] [2020-12-22 23:57:53,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:57:53,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:53,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:57:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:57:53,022 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-22 23:57:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:53,092 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-12-22 23:57:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:57:53,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 23:57:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:53,094 INFO L225 Difference]: With dead ends: 38 [2020-12-22 23:57:53,094 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 23:57:53,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:57:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 23:57:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-22 23:57:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 23:57:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-22 23:57:53,100 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-12-22 23:57:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:53,101 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-22 23:57:53,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:57:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-22 23:57:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 23:57:53,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:53,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:53,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:53,308 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash -599526043, now seen corresponding path program 3 times [2020-12-22 23:57:53,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:53,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514037391] [2020-12-22 23:57:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 23:57:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514037391] [2020-12-22 23:57:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963133208] [2020-12-22 23:57:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:53,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:57:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:57:53,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:57:53,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:53,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 23:57:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594688134] [2020-12-22 23:57:53,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:57:53,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:57:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:57:53,740 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 12 states. [2020-12-22 23:57:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:54,240 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-12-22 23:57:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:57:54,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-22 23:57:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:54,245 INFO L225 Difference]: With dead ends: 56 [2020-12-22 23:57:54,246 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:57:54,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:57:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:57:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-12-22 23:57:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:57:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-12-22 23:57:54,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2020-12-22 23:57:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:54,271 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-12-22 23:57:54,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:57:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-12-22 23:57:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:57:54,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:54,278 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:54,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:54,494 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:54,495 INFO L82 PathProgramCache]: Analyzing trace with hash 295703461, now seen corresponding path program 1 times [2020-12-22 23:57:54,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:54,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448639791] [2020-12-22 23:57:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:57:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448639791] [2020-12-22 23:57:54,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:57:54,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:57:54,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223007604] [2020-12-22 23:57:54,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:57:54,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:57:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:57:54,557 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2020-12-22 23:57:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:54,597 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-22 23:57:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:57:54,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-22 23:57:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:54,599 INFO L225 Difference]: With dead ends: 39 [2020-12-22 23:57:54,600 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 23:57:54,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:57:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 23:57:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 23:57:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 23:57:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 23:57:54,605 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-12-22 23:57:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:54,605 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 23:57:54,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:57:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 23:57:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 23:57:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:54,607 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:54,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 23:57:54,607 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2108322791, now seen corresponding path program 1 times [2020-12-22 23:57:54,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:54,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207388533] [2020-12-22 23:57:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:57:54,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207388533] [2020-12-22 23:57:54,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939057886] [2020-12-22 23:57:54,737 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:57:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:57:54,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:54,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 23:57:54,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219734404] [2020-12-22 23:57:54,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:57:54,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:57:54,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:57:54,902 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-12-22 23:57:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:54,932 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-22 23:57:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:57:54,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-22 23:57:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:54,934 INFO L225 Difference]: With dead ends: 46 [2020-12-22 23:57:54,934 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 23:57:54,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:57:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 23:57:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 23:57:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 23:57:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-22 23:57:54,940 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2020-12-22 23:57:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:54,940 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-22 23:57:54,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:57:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-22 23:57:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 23:57:54,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:54,942 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:55,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:55,147 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:55,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1015339561, now seen corresponding path program 2 times [2020-12-22 23:57:55,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:55,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386813069] [2020-12-22 23:57:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:57:55,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386813069] [2020-12-22 23:57:55,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787430326] [2020-12-22 23:57:55,297 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:55,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:55,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:57:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:57:55,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:55,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 23:57:55,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928677775] [2020-12-22 23:57:55,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:57:55,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:57:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:57:55,430 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2020-12-22 23:57:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:55,465 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-12-22 23:57:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:57:55,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-12-22 23:57:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:55,467 INFO L225 Difference]: With dead ends: 48 [2020-12-22 23:57:55,467 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 23:57:55,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:57:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 23:57:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-22 23:57:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 23:57:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-22 23:57:55,472 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-12-22 23:57:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:55,473 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-22 23:57:55,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:57:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-22 23:57:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:57:55,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:55,475 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:55,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:55,688 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1369524245, now seen corresponding path program 3 times [2020-12-22 23:57:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:55,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148963745] [2020-12-22 23:57:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:57:55,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148963745] [2020-12-22 23:57:55,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791638190] [2020-12-22 23:57:55,867 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:55,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 23:57:55,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:55,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:57:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 23:57:56,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:56,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-22 23:57:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683957384] [2020-12-22 23:57:56,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:57:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:57:56,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:57:56,057 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-12-22 23:57:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:56,237 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-12-22 23:57:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:57:56,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-12-22 23:57:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:56,241 INFO L225 Difference]: With dead ends: 59 [2020-12-22 23:57:56,241 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 23:57:56,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:57:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 23:57:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 23:57:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 23:57:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 23:57:56,249 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-12-22 23:57:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:56,250 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 23:57:56,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:57:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 23:57:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:57:56,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:56,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:56,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:56,466 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -277178908, now seen corresponding path program 4 times [2020-12-22 23:57:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:56,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898209026] [2020-12-22 23:57:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 23:57:56,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898209026] [2020-12-22 23:57:56,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115668099] [2020-12-22 23:57:56,623 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:56,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:57:56,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:56,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:57:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 23:57:56,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:56,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:57:56,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660683017] [2020-12-22 23:57:56,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:57:56,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:57:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:57:56,747 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-12-22 23:57:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:56,781 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-22 23:57:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:57:56,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-12-22 23:57:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:56,782 INFO L225 Difference]: With dead ends: 58 [2020-12-22 23:57:56,782 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 23:57:56,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:57:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 23:57:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 23:57:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 23:57:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-22 23:57:56,789 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-12-22 23:57:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:56,789 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-22 23:57:56,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:57:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-22 23:57:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 23:57:56,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:56,790 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:57,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:57:57,004 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1527976422, now seen corresponding path program 5 times [2020-12-22 23:57:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:57,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847238086] [2020-12-22 23:57:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 23:57:57,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847238086] [2020-12-22 23:57:57,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916048031] [2020-12-22 23:57:57,157 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:57,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 23:57:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:57:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 23:57:57,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:57,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:57:57,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056712805] [2020-12-22 23:57:57,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:57:57,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:57:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:57,399 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 13 states. [2020-12-22 23:57:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:57,442 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-12-22 23:57:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:57:57,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-12-22 23:57:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:57,450 INFO L225 Difference]: With dead ends: 60 [2020-12-22 23:57:57,450 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 23:57:57,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:57:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 23:57:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 23:57:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 23:57:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-22 23:57:57,467 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2020-12-22 23:57:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:57,467 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-22 23:57:57,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:57:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-22 23:57:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 23:57:57,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:57,468 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:57,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:57,683 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1115460968, now seen corresponding path program 6 times [2020-12-22 23:57:57,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:57,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593977689] [2020-12-22 23:57:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 23:57:57,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593977689] [2020-12-22 23:57:57,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124755115] [2020-12-22 23:57:57,808 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:57,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 23:57:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:57,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:57:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:57:58,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:58,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2020-12-22 23:57:58,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744120958] [2020-12-22 23:57:58,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:57:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:57:58,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:57:58,060 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 21 states. [2020-12-22 23:57:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:58,434 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-12-22 23:57:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:57:58,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 23:57:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:58,435 INFO L225 Difference]: With dead ends: 82 [2020-12-22 23:57:58,435 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:57:58,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:57:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:57:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-12-22 23:57:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:57:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-22 23:57:58,458 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2020-12-22 23:57:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:58,458 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-22 23:57:58,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:57:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-22 23:57:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 23:57:58,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:58,462 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:58,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:58,671 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash -761705108, now seen corresponding path program 1 times [2020-12-22 23:57:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:58,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616991937] [2020-12-22 23:57:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-22 23:57:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616991937] [2020-12-22 23:57:58,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057630146] [2020-12-22 23:57:58,749 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:57:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:57:58,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:57:58,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 23:57:58,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069362971] [2020-12-22 23:57:58,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:57:58,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:58,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:57:58,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:57:58,868 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 3 states. [2020-12-22 23:57:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:58,879 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-12-22 23:57:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:57:58,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-22 23:57:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:58,880 INFO L225 Difference]: With dead ends: 69 [2020-12-22 23:57:58,880 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 23:57:58,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:57:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 23:57:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 23:57:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 23:57:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-22 23:57:58,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 42 [2020-12-22 23:57:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:58,895 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-22 23:57:58,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:57:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-22 23:57:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 23:57:58,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:58,897 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:59,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:57:59,112 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:59,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2001675424, now seen corresponding path program 7 times [2020-12-22 23:57:59,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:59,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956636353] [2020-12-22 23:57:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:57:59,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956636353] [2020-12-22 23:57:59,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810856473] [2020-12-22 23:57:59,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:59,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:57:59,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:57:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:57:59,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:57:59,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 23:57:59,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230953651] [2020-12-22 23:57:59,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:57:59,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:57:59,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:57:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:57:59,432 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 15 states. [2020-12-22 23:57:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:57:59,487 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-12-22 23:57:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:57:59,488 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-12-22 23:57:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:57:59,489 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:57:59,489 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 23:57:59,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:57:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 23:57:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 23:57:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 23:57:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-22 23:57:59,495 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 46 [2020-12-22 23:57:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:57:59,523 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-22 23:57:59,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:57:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-22 23:57:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 23:57:59,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:57:59,524 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:57:59,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:57:59,744 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:57:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:57:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1185397986, now seen corresponding path program 8 times [2020-12-22 23:57:59,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:57:59,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384852235] [2020-12-22 23:57:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:57:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:57:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:57:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384852235] [2020-12-22 23:57:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695921667] [2020-12-22 23:57:59,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:57:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:57:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:57:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:57:59,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:58:00,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:00,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 23:58:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655062950] [2020-12-22 23:58:00,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:58:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:58:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:58:00,008 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2020-12-22 23:58:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:00,056 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-12-22 23:58:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:58:00,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-12-22 23:58:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:00,057 INFO L225 Difference]: With dead ends: 76 [2020-12-22 23:58:00,057 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 23:58:00,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:58:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 23:58:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-22 23:58:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:58:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 23:58:00,063 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 48 [2020-12-22 23:58:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:00,064 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 23:58:00,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:58:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 23:58:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:58:00,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:00,065 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:00,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:58:00,277 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262948, now seen corresponding path program 9 times [2020-12-22 23:58:00,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:00,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12752514] [2020-12-22 23:58:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:58:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12752514] [2020-12-22 23:58:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185581652] [2020-12-22 23:58:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:00,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:58:00,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:58:00,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-22 23:58:00,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:00,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-12-22 23:58:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394409028] [2020-12-22 23:58:00,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:58:00,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:58:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:58:00,622 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 22 states. [2020-12-22 23:58:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:00,864 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-12-22 23:58:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:58:00,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-12-22 23:58:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:00,865 INFO L225 Difference]: With dead ends: 92 [2020-12-22 23:58:00,865 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 23:58:00,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:58:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 23:58:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 23:58:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 23:58:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-12-22 23:58:00,871 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-12-22 23:58:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:00,871 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-12-22 23:58:00,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:58:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-12-22 23:58:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:58:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:00,873 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:01,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:01,083 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 54619549, now seen corresponding path program 10 times [2020-12-22 23:58:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:01,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862488413] [2020-12-22 23:58:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:58:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862488413] [2020-12-22 23:58:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522826182] [2020-12-22 23:58:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:01,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:01,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:58:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:58:01,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:01,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:58:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809611534] [2020-12-22 23:58:01,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:58:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:58:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:58:01,417 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 18 states. [2020-12-22 23:58:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:01,465 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-12-22 23:58:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:58:01,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-12-22 23:58:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:01,466 INFO L225 Difference]: With dead ends: 86 [2020-12-22 23:58:01,466 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 23:58:01,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:58:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 23:58:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 23:58:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 23:58:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-22 23:58:01,474 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2020-12-22 23:58:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:01,475 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-22 23:58:01,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:58:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-22 23:58:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:58:01,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:01,475 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:01,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:01,690 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:01,691 INFO L82 PathProgramCache]: Analyzing trace with hash 868425307, now seen corresponding path program 11 times [2020-12-22 23:58:01,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:01,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212431891] [2020-12-22 23:58:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:58:01,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212431891] [2020-12-22 23:58:01,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739676747] [2020-12-22 23:58:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:02,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 23:58:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:58:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:58:02,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:02,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 23:58:02,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336560225] [2020-12-22 23:58:02,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:58:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:58:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:58:02,219 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2020-12-22 23:58:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:02,275 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-12-22 23:58:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:58:02,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-12-22 23:58:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:02,277 INFO L225 Difference]: With dead ends: 88 [2020-12-22 23:58:02,277 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 23:58:02,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:58:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 23:58:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 23:58:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 23:58:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-12-22 23:58:02,282 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2020-12-22 23:58:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:02,282 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-12-22 23:58:02,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:58:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-12-22 23:58:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 23:58:02,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:02,283 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:02,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:02,497 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1251710873, now seen corresponding path program 12 times [2020-12-22 23:58:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:02,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925280288] [2020-12-22 23:58:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:58:02,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925280288] [2020-12-22 23:58:02,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543261675] [2020-12-22 23:58:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:02,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:58:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:58:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-22 23:58:03,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:03,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2020-12-22 23:58:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486828428] [2020-12-22 23:58:03,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:58:03,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:03,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:58:03,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:58:03,029 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 28 states. [2020-12-22 23:58:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:03,691 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-12-22 23:58:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:58:03,692 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-12-22 23:58:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:03,693 INFO L225 Difference]: With dead ends: 97 [2020-12-22 23:58:03,693 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 23:58:03,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=546, Invalid=1710, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:58:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 23:58:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-12-22 23:58:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 23:58:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-12-22 23:58:03,700 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 59 [2020-12-22 23:58:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:03,700 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-12-22 23:58:03,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:58:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-12-22 23:58:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 23:58:03,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:03,701 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:03,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:58:03,915 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash 484971981, now seen corresponding path program 13 times [2020-12-22 23:58:03,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:03,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494483055] [2020-12-22 23:58:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:58:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494483055] [2020-12-22 23:58:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608088181] [2020-12-22 23:58:04,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:58:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:58:04,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:04,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:58:04,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372722874] [2020-12-22 23:58:04,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:58:04,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:04,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:58:04,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:58:04,282 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 21 states. [2020-12-22 23:58:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:04,356 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-12-22 23:58:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:58:04,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-12-22 23:58:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:04,358 INFO L225 Difference]: With dead ends: 100 [2020-12-22 23:58:04,358 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 23:58:04,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:58:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 23:58:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 23:58:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 23:58:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-22 23:58:04,368 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 65 [2020-12-22 23:58:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:04,369 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-22 23:58:04,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:58:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-22 23:58:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 23:58:04,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:04,370 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:04,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:58:04,583 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:04,584 INFO L82 PathProgramCache]: Analyzing trace with hash 483029259, now seen corresponding path program 14 times [2020-12-22 23:58:04,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:04,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250650517] [2020-12-22 23:58:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:58:04,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250650517] [2020-12-22 23:58:04,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050259332] [2020-12-22 23:58:04,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:04,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:04,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:58:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:58:04,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:04,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 23:58:04,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744844959] [2020-12-22 23:58:04,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 23:58:04,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:04,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 23:58:04,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:58:04,956 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 22 states. [2020-12-22 23:58:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:05,014 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-12-22 23:58:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:58:05,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 23:58:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:05,015 INFO L225 Difference]: With dead ends: 102 [2020-12-22 23:58:05,015 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 23:58:05,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 23:58:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 23:58:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 23:58:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 23:58:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-12-22 23:58:05,020 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2020-12-22 23:58:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:05,020 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-12-22 23:58:05,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 23:58:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-12-22 23:58:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:58:05,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:05,021 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:05,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 23:58:05,236 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1383926583, now seen corresponding path program 15 times [2020-12-22 23:58:05,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:05,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063157480] [2020-12-22 23:58:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:58:05,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063157480] [2020-12-22 23:58:05,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407799489] [2020-12-22 23:58:05,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:05,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:58:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:58:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-22 23:58:05,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:05,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2020-12-22 23:58:05,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336142658] [2020-12-22 23:58:05,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:58:05,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:58:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:58:05,759 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 30 states. [2020-12-22 23:58:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:06,274 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-12-22 23:58:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:58:06,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-12-22 23:58:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:06,276 INFO L225 Difference]: With dead ends: 122 [2020-12-22 23:58:06,276 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 23:58:06,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:58:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 23:58:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-22 23:58:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 23:58:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-12-22 23:58:06,283 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2020-12-22 23:58:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:06,283 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-12-22 23:58:06,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:58:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-12-22 23:58:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 23:58:06,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:06,285 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:06,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:58:06,498 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1075127688, now seen corresponding path program 16 times [2020-12-22 23:58:06,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:06,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622523263] [2020-12-22 23:58:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 23:58:06,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622523263] [2020-12-22 23:58:06,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970340628] [2020-12-22 23:58:06,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:06,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:58:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 23:58:06,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:06,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:58:06,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628582555] [2020-12-22 23:58:06,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:58:06,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:58:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:58:06,945 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 24 states. [2020-12-22 23:58:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:07,011 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-12-22 23:58:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:58:07,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 74 [2020-12-22 23:58:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:07,012 INFO L225 Difference]: With dead ends: 112 [2020-12-22 23:58:07,012 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 23:58:07,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:58:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 23:58:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-22 23:58:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 23:58:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-12-22 23:58:07,017 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 74 [2020-12-22 23:58:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:07,018 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-12-22 23:58:07,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:58:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-12-22 23:58:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 23:58:07,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:07,019 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:07,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:58:07,234 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1131581450, now seen corresponding path program 17 times [2020-12-22 23:58:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:07,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630311498] [2020-12-22 23:58:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 23:58:07,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630311498] [2020-12-22 23:58:07,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073054220] [2020-12-22 23:58:07,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:08,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 23:58:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:08,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 23:58:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 23:58:08,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:08,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 23:58:08,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12290711] [2020-12-22 23:58:08,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 23:58:08,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 23:58:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:58:08,240 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 25 states. [2020-12-22 23:58:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:08,302 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-12-22 23:58:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:58:08,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 76 [2020-12-22 23:58:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:08,304 INFO L225 Difference]: With dead ends: 114 [2020-12-22 23:58:08,304 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 23:58:08,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:58:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 23:58:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-22 23:58:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 23:58:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-12-22 23:58:08,309 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 76 [2020-12-22 23:58:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:08,309 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-12-22 23:58:08,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 23:58:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-12-22 23:58:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 23:58:08,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:08,310 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:08,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:08,525 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash -450928116, now seen corresponding path program 18 times [2020-12-22 23:58:08,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:08,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791505169] [2020-12-22 23:58:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 23:58:08,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791505169] [2020-12-22 23:58:08,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2870174] [2020-12-22 23:58:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:09,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 23:58:09,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:58:09,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-22 23:58:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:09,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2020-12-22 23:58:09,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289370671] [2020-12-22 23:58:09,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:58:09,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:58:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:58:09,297 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 36 states. [2020-12-22 23:58:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:10,230 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2020-12-22 23:58:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:58:10,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-12-22 23:58:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:10,231 INFO L225 Difference]: With dead ends: 123 [2020-12-22 23:58:10,231 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 23:58:10,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 23:58:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 23:58:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-12-22 23:58:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 23:58:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-12-22 23:58:10,237 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 78 [2020-12-22 23:58:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:10,238 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-12-22 23:58:10,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:58:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-12-22 23:58:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 23:58:10,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:10,239 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:10,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:58:10,451 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1555880828, now seen corresponding path program 19 times [2020-12-22 23:58:10,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:10,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168698010] [2020-12-22 23:58:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-22 23:58:10,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168698010] [2020-12-22 23:58:10,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674873562] [2020-12-22 23:58:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:58:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-22 23:58:11,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:11,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 23:58:11,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133181996] [2020-12-22 23:58:11,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:58:11,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:58:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:58:11,029 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 27 states. [2020-12-22 23:58:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:11,112 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-12-22 23:58:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:58:11,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-12-22 23:58:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:11,114 INFO L225 Difference]: With dead ends: 126 [2020-12-22 23:58:11,114 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:58:11,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:58:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:58:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-22 23:58:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 23:58:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-12-22 23:58:11,120 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 84 [2020-12-22 23:58:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:11,121 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-12-22 23:58:11,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:58:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-12-22 23:58:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 23:58:11,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:11,122 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:11,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:11,336 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 612816006, now seen corresponding path program 20 times [2020-12-22 23:58:11,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:11,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529145227] [2020-12-22 23:58:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-22 23:58:11,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529145227] [2020-12-22 23:58:11,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652246356] [2020-12-22 23:58:11,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:11,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:11,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:58:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-22 23:58:11,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:11,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 23:58:11,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381631210] [2020-12-22 23:58:11,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:58:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:11,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:58:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:58:11,858 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 28 states. [2020-12-22 23:58:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:11,950 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-12-22 23:58:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:58:11,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-12-22 23:58:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:11,951 INFO L225 Difference]: With dead ends: 128 [2020-12-22 23:58:11,951 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 23:58:11,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:58:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 23:58:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-22 23:58:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 23:58:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-12-22 23:58:11,957 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 86 [2020-12-22 23:58:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:11,957 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-12-22 23:58:11,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:58:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-12-22 23:58:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 23:58:11,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:11,959 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:12,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:58:12,173 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1671334920, now seen corresponding path program 21 times [2020-12-22 23:58:12,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:12,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807051255] [2020-12-22 23:58:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-22 23:58:12,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807051255] [2020-12-22 23:58:12,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947234178] [2020-12-22 23:58:12,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:12,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 23:58:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:58:12,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-22 23:58:12,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:12,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 38 [2020-12-22 23:58:12,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326999248] [2020-12-22 23:58:12,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:58:12,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:12,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:58:12,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:58:12,881 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 38 states. [2020-12-22 23:58:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:13,586 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2020-12-22 23:58:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:58:13,586 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2020-12-22 23:58:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:13,587 INFO L225 Difference]: With dead ends: 152 [2020-12-22 23:58:13,587 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 23:58:13,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1281, Invalid=2751, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 23:58:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 23:58:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-22 23:58:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 23:58:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-12-22 23:58:13,592 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-12-22 23:58:13,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:13,594 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-12-22 23:58:13,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:58:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-12-22 23:58:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 23:58:13,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:13,595 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:13,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:13,809 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash 647894225, now seen corresponding path program 22 times [2020-12-22 23:58:13,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:13,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661499742] [2020-12-22 23:58:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 23:58:14,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661499742] [2020-12-22 23:58:14,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388398679] [2020-12-22 23:58:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:14,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:14,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:58:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 23:58:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:14,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:58:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444692613] [2020-12-22 23:58:14,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:58:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:58:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:58:14,403 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 30 states. [2020-12-22 23:58:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:14,491 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-12-22 23:58:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:58:14,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2020-12-22 23:58:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:14,493 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:58:14,493 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 23:58:14,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:58:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 23:58:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 23:58:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 23:58:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-12-22 23:58:14,498 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 93 [2020-12-22 23:58:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:14,499 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-12-22 23:58:14,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:58:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-12-22 23:58:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 23:58:14,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:14,500 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:14,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 23:58:14,714 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash -955037937, now seen corresponding path program 23 times [2020-12-22 23:58:14,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:14,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137090054] [2020-12-22 23:58:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 23:58:15,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137090054] [2020-12-22 23:58:15,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291890246] [2020-12-22 23:58:15,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:16,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-22 23:58:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 23:58:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 23:58:16,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:16,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 23:58:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464212748] [2020-12-22 23:58:16,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:58:16,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:58:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:58:16,254 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 31 states. [2020-12-22 23:58:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:16,341 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-12-22 23:58:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:58:16,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2020-12-22 23:58:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:16,342 INFO L225 Difference]: With dead ends: 140 [2020-12-22 23:58:16,342 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 23:58:16,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:58:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 23:58:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-22 23:58:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 23:58:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-12-22 23:58:16,347 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 95 [2020-12-22 23:58:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:16,348 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-12-22 23:58:16,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:58:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-12-22 23:58:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 23:58:16,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:16,349 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:16,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:16,564 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash 520413645, now seen corresponding path program 24 times [2020-12-22 23:58:16,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:16,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252811169] [2020-12-22 23:58:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 23:58:17,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252811169] [2020-12-22 23:58:17,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933208536] [2020-12-22 23:58:17,046 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:17,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 23:58:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:17,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:58:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:17,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:58:17,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:17,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:17,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:17,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:17,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 23:58:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-12-22 23:58:17,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:17,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2020-12-22 23:58:17,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534811408] [2020-12-22 23:58:17,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:58:17,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:58:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1375, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:58:17,891 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 44 states. [2020-12-22 23:58:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:20,609 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2020-12-22 23:58:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 23:58:20,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-12-22 23:58:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:20,612 INFO L225 Difference]: With dead ends: 168 [2020-12-22 23:58:20,612 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 23:58:20,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1648, Invalid=5158, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 23:58:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 23:58:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-22 23:58:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 23:58:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-12-22 23:58:20,619 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2020-12-22 23:58:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:20,619 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-12-22 23:58:20,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:58:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-12-22 23:58:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 23:58:20,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:20,620 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:20,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:58:20,829 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:20,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1504964400, now seen corresponding path program 25 times [2020-12-22 23:58:20,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:20,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142126243] [2020-12-22 23:58:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:21,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142126243] [2020-12-22 23:58:21,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439720447] [2020-12-22 23:58:21,347 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 23:58:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:21,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:21,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 23:58:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38753598] [2020-12-22 23:58:21,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:58:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:58:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:58:21,532 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 33 states. [2020-12-22 23:58:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:21,617 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2020-12-22 23:58:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:58:21,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2020-12-22 23:58:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:21,618 INFO L225 Difference]: With dead ends: 150 [2020-12-22 23:58:21,618 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 23:58:21,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:58:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 23:58:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-22 23:58:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 23:58:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-12-22 23:58:21,624 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 102 [2020-12-22 23:58:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:21,624 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-12-22 23:58:21,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:58:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-12-22 23:58:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 23:58:21,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:21,625 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:21,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:21,839 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash -289381710, now seen corresponding path program 26 times [2020-12-22 23:58:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:21,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694750574] [2020-12-22 23:58:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694750574] [2020-12-22 23:58:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258063481] [2020-12-22 23:58:22,395 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:22,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 23:58:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:22,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:22,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 23:58:22,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826558532] [2020-12-22 23:58:22,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 23:58:22,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:22,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 23:58:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:58:22,575 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 34 states. [2020-12-22 23:58:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:22,674 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-12-22 23:58:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 23:58:22,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2020-12-22 23:58:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:22,675 INFO L225 Difference]: With dead ends: 152 [2020-12-22 23:58:22,675 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 23:58:22,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:58:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 23:58:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-22 23:58:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 23:58:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-12-22 23:58:22,680 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 104 [2020-12-22 23:58:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:22,681 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-12-22 23:58:22,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 23:58:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-12-22 23:58:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 23:58:22,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:22,682 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:22,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:58:22,896 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1920859572, now seen corresponding path program 27 times [2020-12-22 23:58:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:22,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144838934] [2020-12-22 23:58:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:23,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144838934] [2020-12-22 23:58:23,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942890370] [2020-12-22 23:58:23,463 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:23,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:58:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:23,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 23:58:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:23,668 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 23:58:23,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:58:23,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:58:23,677 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:58:23,677 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2020-12-22 23:58:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 3 proven. 92 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-12-22 23:58:24,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:24,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19] total 51 [2020-12-22 23:58:24,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368653945] [2020-12-22 23:58:24,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 23:58:24,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 23:58:24,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=1930, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 23:58:24,340 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 51 states. [2020-12-22 23:58:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:25,860 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2020-12-22 23:58:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 23:58:25,860 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-12-22 23:58:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:25,862 INFO L225 Difference]: With dead ends: 182 [2020-12-22 23:58:25,862 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 23:58:25,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1771, Invalid=5711, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 23:58:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 23:58:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2020-12-22 23:58:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 23:58:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-12-22 23:58:25,870 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 106 [2020-12-22 23:58:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:25,870 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-12-22 23:58:25,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 23:58:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-12-22 23:58:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 23:58:25,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:25,871 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:26,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 23:58:26,087 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:26,088 INFO L82 PathProgramCache]: Analyzing trace with hash 172774772, now seen corresponding path program 2 times [2020-12-22 23:58:26,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:26,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279581517] [2020-12-22 23:58:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279581517] [2020-12-22 23:58:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805651765] [2020-12-22 23:58:26,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:26,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 23:58:26,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:26,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:26,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 23:58:26,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645587233] [2020-12-22 23:58:26,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:58:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:58:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:58:26,915 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 36 states. [2020-12-22 23:58:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:27,016 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-12-22 23:58:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:58:27,017 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2020-12-22 23:58:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:27,018 INFO L225 Difference]: With dead ends: 166 [2020-12-22 23:58:27,018 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 23:58:27,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:58:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 23:58:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-22 23:58:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 23:58:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-12-22 23:58:27,024 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 108 [2020-12-22 23:58:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:27,025 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-12-22 23:58:27,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:58:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-12-22 23:58:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 23:58:27,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:27,026 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:27,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:58:27,239 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash -270491786, now seen corresponding path program 3 times [2020-12-22 23:58:27,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:27,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541459680] [2020-12-22 23:58:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 23:58:27,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541459680] [2020-12-22 23:58:27,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15640858] [2020-12-22 23:58:27,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:27,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:58:27,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:58:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 1121 trivial. 0 not checked. [2020-12-22 23:58:28,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:28,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 10] total 44 [2020-12-22 23:58:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243247898] [2020-12-22 23:58:28,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:58:28,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:58:28,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=1225, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:58:28,211 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 44 states. [2020-12-22 23:58:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:29,379 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2020-12-22 23:58:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 23:58:29,380 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2020-12-22 23:58:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:29,381 INFO L225 Difference]: With dead ends: 196 [2020-12-22 23:58:29,381 INFO L226 Difference]: Without dead ends: 148 [2020-12-22 23:58:29,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2199, Invalid=4941, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 23:58:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-22 23:58:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 121. [2020-12-22 23:58:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 23:58:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-12-22 23:58:29,389 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 110 [2020-12-22 23:58:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:29,390 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-12-22 23:58:29,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:58:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-12-22 23:58:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 23:58:29,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:29,391 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:29,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:58:29,605 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 764869471, now seen corresponding path program 4 times [2020-12-22 23:58:29,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:29,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995835594] [2020-12-22 23:58:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-22 23:58:30,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995835594] [2020-12-22 23:58:30,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811491080] [2020-12-22 23:58:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:30,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:58:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-22 23:58:30,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:30,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 23:58:30,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10617624] [2020-12-22 23:58:30,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:58:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:58:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:58:30,478 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 38 states. [2020-12-22 23:58:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:30,589 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2020-12-22 23:58:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:58:30,590 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2020-12-22 23:58:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:30,591 INFO L225 Difference]: With dead ends: 174 [2020-12-22 23:58:30,591 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 23:58:30,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:58:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 23:58:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-22 23:58:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 23:58:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-12-22 23:58:30,597 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 115 [2020-12-22 23:58:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:30,597 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-12-22 23:58:30,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:58:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-12-22 23:58:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 23:58:30,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:30,598 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:30,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:58:30,811 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2143433955, now seen corresponding path program 5 times [2020-12-22 23:58:30,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:30,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295655708] [2020-12-22 23:58:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-22 23:58:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295655708] [2020-12-22 23:58:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044311352] [2020-12-22 23:58:31,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:37,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 23:58:37,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:58:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2020-12-22 23:58:37,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:37,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 11] total 47 [2020-12-22 23:58:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728592114] [2020-12-22 23:58:37,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:58:37,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:58:37,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=1413, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:58:37,358 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 47 states. [2020-12-22 23:58:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:38,682 INFO L93 Difference]: Finished difference Result 230 states and 239 transitions. [2020-12-22 23:58:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 23:58:38,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 117 [2020-12-22 23:58:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:38,684 INFO L225 Difference]: With dead ends: 230 [2020-12-22 23:58:38,684 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 23:58:38,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2493, Invalid=5697, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 23:58:38,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 23:58:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 128. [2020-12-22 23:58:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 23:58:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-22 23:58:38,693 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 117 [2020-12-22 23:58:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:38,693 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-22 23:58:38,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:58:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-22 23:58:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 23:58:38,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:38,694 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:38,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:58:38,895 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:38,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1844102708, now seen corresponding path program 28 times [2020-12-22 23:58:38,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:38,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172208837] [2020-12-22 23:58:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-22 23:58:39,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172208837] [2020-12-22 23:58:39,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295775165] [2020-12-22 23:58:39,613 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:39,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:58:39,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:58:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-22 23:58:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:39,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 23:58:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206693647] [2020-12-22 23:58:39,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:58:39,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:39,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:58:39,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:58:39,826 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 40 states. [2020-12-22 23:58:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:39,945 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-12-22 23:58:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 23:58:39,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 120 [2020-12-22 23:58:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:39,947 INFO L225 Difference]: With dead ends: 184 [2020-12-22 23:58:39,947 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 23:58:39,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:58:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 23:58:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-22 23:58:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 23:58:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-22 23:58:39,953 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 120 [2020-12-22 23:58:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:39,953 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-22 23:58:39,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:58:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-22 23:58:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 23:58:39,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:39,955 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:40,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 23:58:40,167 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1382423862, now seen corresponding path program 29 times [2020-12-22 23:58:40,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:40,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936210718] [2020-12-22 23:58:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-22 23:58:40,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936210718] [2020-12-22 23:58:40,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143375833] [2020-12-22 23:58:40,927 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:48,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2020-12-22 23:58:48,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:58:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-22 23:58:48,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:48,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 23:58:48,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821757261] [2020-12-22 23:58:48,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:58:48,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:48,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:58:48,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:58:48,705 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 41 states. [2020-12-22 23:58:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:48,841 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2020-12-22 23:58:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:58:48,841 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 122 [2020-12-22 23:58:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:48,842 INFO L225 Difference]: With dead ends: 186 [2020-12-22 23:58:48,842 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 23:58:48,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:58:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 23:58:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-22 23:58:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 23:58:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-12-22 23:58:48,848 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 122 [2020-12-22 23:58:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:48,849 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-12-22 23:58:48,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 23:58:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-12-22 23:58:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 23:58:48,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:48,850 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:49,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:49,064 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 90684344, now seen corresponding path program 30 times [2020-12-22 23:58:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:49,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332692975] [2020-12-22 23:58:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-22 23:58:49,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332692975] [2020-12-22 23:58:49,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031324279] [2020-12-22 23:58:49,962 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:50,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:58:50,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:58:50,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:50,801 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:58:50,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:50,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:50,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:50,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:58:50,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 23:58:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 45 proven. 68 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-12-22 23:58:50,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:50,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 17] total 56 [2020-12-22 23:58:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168589458] [2020-12-22 23:58:50,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 23:58:50,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 23:58:50,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=2193, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 23:58:50,903 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 56 states. [2020-12-22 23:58:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:53,164 INFO L93 Difference]: Finished difference Result 214 states and 223 transitions. [2020-12-22 23:58:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 23:58:53,166 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 124 [2020-12-22 23:58:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:53,168 INFO L225 Difference]: With dead ends: 214 [2020-12-22 23:58:53,168 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 23:58:53,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2839, Invalid=8503, Unknown=0, NotChecked=0, Total=11342 [2020-12-22 23:58:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 23:58:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-12-22 23:58:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 23:58:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-12-22 23:58:53,176 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 124 [2020-12-22 23:58:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:53,176 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-12-22 23:58:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 23:58:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-12-22 23:58:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 23:58:53,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:53,177 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 9, 8, 8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:53,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:53,389 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash -877020126, now seen corresponding path program 6 times [2020-12-22 23:58:53,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:53,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614942897] [2020-12-22 23:58:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-22 23:58:54,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614942897] [2020-12-22 23:58:54,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712726676] [2020-12-22 23:58:54,312 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:54,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 23:58:54,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:54,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:58:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-12-22 23:58:55,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:55,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 12] total 52 [2020-12-22 23:58:55,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720602827] [2020-12-22 23:58:55,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 23:58:55,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 23:58:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=917, Invalid=1735, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:58:55,019 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 52 states. [2020-12-22 23:58:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:56,694 INFO L93 Difference]: Finished difference Result 244 states and 253 transitions. [2020-12-22 23:58:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 23:58:56,695 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 128 [2020-12-22 23:58:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:56,697 INFO L225 Difference]: With dead ends: 244 [2020-12-22 23:58:56,697 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 23:58:56,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3065, Invalid=7035, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 23:58:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 23:58:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2020-12-22 23:58:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 23:58:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2020-12-22 23:58:56,705 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 128 [2020-12-22 23:58:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:56,706 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2020-12-22 23:58:56,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 23:58:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2020-12-22 23:58:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 23:58:56,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:56,707 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:56,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:56,921 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash 600650123, now seen corresponding path program 31 times [2020-12-22 23:58:56,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:56,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089959584] [2020-12-22 23:58:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-22 23:58:57,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089959584] [2020-12-22 23:58:57,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883791863] [2020-12-22 23:58:57,908 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 23:58:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-22 23:58:58,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:58,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 23:58:58,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904051094] [2020-12-22 23:58:58,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:58:58,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:58:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:58:58,133 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 44 states. [2020-12-22 23:58:58,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:58,280 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2020-12-22 23:58:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 23:58:58,281 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 131 [2020-12-22 23:58:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:58,282 INFO L225 Difference]: With dead ends: 198 [2020-12-22 23:58:58,282 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 23:58:58,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:58:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 23:58:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-22 23:58:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 23:58:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-12-22 23:58:58,289 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 131 [2020-12-22 23:58:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:58,289 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-12-22 23:58:58,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:58:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-12-22 23:58:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 23:58:58,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:58,290 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:58:58,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 23:58:58,505 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:58:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:58:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1559706295, now seen corresponding path program 32 times [2020-12-22 23:58:58,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:58:58,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310468842] [2020-12-22 23:58:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:58:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:58:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1815 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-22 23:58:59,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310468842] [2020-12-22 23:58:59,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106261043] [2020-12-22 23:58:59,519 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:58:59,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:58:59,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:58:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 23:58:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:58:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1815 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-22 23:58:59,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:58:59,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 23:58:59,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211596643] [2020-12-22 23:58:59,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 23:58:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:58:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 23:58:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:58:59,747 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 45 states. [2020-12-22 23:58:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:58:59,889 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2020-12-22 23:58:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 23:58:59,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-12-22 23:58:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:58:59,890 INFO L225 Difference]: With dead ends: 200 [2020-12-22 23:58:59,890 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 23:58:59,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:58:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 23:58:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-22 23:58:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 23:58:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-12-22 23:58:59,897 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 133 [2020-12-22 23:58:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:58:59,897 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-12-22 23:58:59,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 23:58:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-12-22 23:58:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 23:58:59,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:58:59,898 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:00,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:00,112 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1101947271, now seen corresponding path program 33 times [2020-12-22 23:59:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:00,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419364447] [2020-12-22 23:59:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-22 23:59:01,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419364447] [2020-12-22 23:59:01,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333421610] [2020-12-22 23:59:01,121 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:01,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 23:59:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 23:59:01,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 1767 trivial. 0 not checked. [2020-12-22 23:59:01,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:01,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 18] total 61 [2020-12-22 23:59:01,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258992101] [2020-12-22 23:59:01,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 23:59:01,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:01,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 23:59:01,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1030, Invalid=2630, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 23:59:01,992 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 61 states. [2020-12-22 23:59:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:04,761 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2020-12-22 23:59:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 23:59:04,762 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 135 [2020-12-22 23:59:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:04,763 INFO L225 Difference]: With dead ends: 229 [2020-12-22 23:59:04,763 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 23:59:04,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3035, Invalid=8737, Unknown=0, NotChecked=0, Total=11772 [2020-12-22 23:59:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 23:59:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2020-12-22 23:59:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 23:59:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 172 transitions. [2020-12-22 23:59:04,773 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 172 transitions. Word has length 135 [2020-12-22 23:59:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:04,773 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 172 transitions. [2020-12-22 23:59:04,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 23:59:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 172 transitions. [2020-12-22 23:59:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 23:59:04,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:04,774 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 10, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:04,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:04,990 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1789192685, now seen corresponding path program 7 times [2020-12-22 23:59:04,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:04,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791831809] [2020-12-22 23:59:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-22 23:59:06,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791831809] [2020-12-22 23:59:06,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829372381] [2020-12-22 23:59:06,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 23:59:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-22 23:59:06,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:06,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 23:59:06,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891873021] [2020-12-22 23:59:06,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:59:06,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:59:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:59:06,405 INFO L87 Difference]: Start difference. First operand 167 states and 172 transitions. Second operand 47 states. [2020-12-22 23:59:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:06,574 INFO L93 Difference]: Finished difference Result 248 states and 258 transitions. [2020-12-22 23:59:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 23:59:06,575 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-12-22 23:59:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:06,576 INFO L225 Difference]: With dead ends: 248 [2020-12-22 23:59:06,576 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 23:59:06,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:59:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 23:59:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-22 23:59:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 23:59:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 174 transitions. [2020-12-22 23:59:06,587 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 174 transitions. Word has length 139 [2020-12-22 23:59:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:06,588 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 174 transitions. [2020-12-22 23:59:06,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:59:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 174 transitions. [2020-12-22 23:59:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 23:59:06,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:06,589 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 10, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:06,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 23:59:06,802 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:06,803 INFO L82 PathProgramCache]: Analyzing trace with hash -714612821, now seen corresponding path program 8 times [2020-12-22 23:59:06,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:06,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86274360] [2020-12-22 23:59:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-22 23:59:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86274360] [2020-12-22 23:59:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481989837] [2020-12-22 23:59:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:08,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:59:08,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 23:59:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-22 23:59:08,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:08,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 23:59:08,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342095747] [2020-12-22 23:59:08,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 23:59:08,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 23:59:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:59:08,199 INFO L87 Difference]: Start difference. First operand 169 states and 174 transitions. Second operand 48 states. [2020-12-22 23:59:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:08,372 INFO L93 Difference]: Finished difference Result 250 states and 260 transitions. [2020-12-22 23:59:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 23:59:08,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-12-22 23:59:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:08,374 INFO L225 Difference]: With dead ends: 250 [2020-12-22 23:59:08,374 INFO L226 Difference]: Without dead ends: 172 [2020-12-22 23:59:08,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:59:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-22 23:59:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-12-22 23:59:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 23:59:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 176 transitions. [2020-12-22 23:59:08,383 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 176 transitions. Word has length 141 [2020-12-22 23:59:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:08,383 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 176 transitions. [2020-12-22 23:59:08,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 23:59:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 176 transitions. [2020-12-22 23:59:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 23:59:08,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:08,384 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 10, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:08,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 23:59:08,599 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1690018327, now seen corresponding path program 9 times [2020-12-22 23:59:08,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:08,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073294936] [2020-12-22 23:59:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-22 23:59:09,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073294936] [2020-12-22 23:59:09,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917697397] [2020-12-22 23:59:09,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:09,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 23:59:09,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:59:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 9 proven. 126 refuted. 0 times theorem prover too weak. 2057 trivial. 0 not checked. [2020-12-22 23:59:10,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:10,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 13] total 59 [2020-12-22 23:59:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624521861] [2020-12-22 23:59:10,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 23:59:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 23:59:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=2227, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 23:59:10,300 INFO L87 Difference]: Start difference. First operand 171 states and 176 transitions. Second operand 59 states. [2020-12-22 23:59:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:12,367 INFO L93 Difference]: Finished difference Result 343 states and 356 transitions. [2020-12-22 23:59:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 23:59:12,368 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 143 [2020-12-22 23:59:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:12,369 INFO L225 Difference]: With dead ends: 343 [2020-12-22 23:59:12,369 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 23:59:12,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2044 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3993, Invalid=9117, Unknown=0, NotChecked=0, Total=13110 [2020-12-22 23:59:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 23:59:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 176. [2020-12-22 23:59:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 23:59:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-12-22 23:59:12,380 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 143 [2020-12-22 23:59:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:12,380 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-12-22 23:59:12,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 23:59:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-12-22 23:59:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 23:59:12,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:12,382 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:12,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 23:59:12,595 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:12,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2115547125, now seen corresponding path program 34 times [2020-12-22 23:59:12,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:12,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40402557] [2020-12-22 23:59:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-22 23:59:13,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40402557] [2020-12-22 23:59:13,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226234437] [2020-12-22 23:59:13,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:13,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:59:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:59:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 23:59:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:59:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-22 23:59:14,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:59:14,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 23:59:14,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357745358] [2020-12-22 23:59:14,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 23:59:14,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:59:14,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 23:59:14,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:59:14,149 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 50 states. [2020-12-22 23:59:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:59:14,322 INFO L93 Difference]: Finished difference Result 260 states and 272 transitions. [2020-12-22 23:59:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 23:59:14,328 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 147 [2020-12-22 23:59:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:59:14,329 INFO L225 Difference]: With dead ends: 260 [2020-12-22 23:59:14,329 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 23:59:14,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:59:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 23:59:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-12-22 23:59:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 23:59:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2020-12-22 23:59:14,339 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 147 [2020-12-22 23:59:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:59:14,339 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2020-12-22 23:59:14,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 23:59:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2020-12-22 23:59:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 23:59:14,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:59:14,341 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:59:14,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:59:14,556 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:59:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:59:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1881077837, now seen corresponding path program 35 times [2020-12-22 23:59:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:59:14,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545366466] [2020-12-22 23:59:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:59:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:59:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-22 23:59:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545366466] [2020-12-22 23:59:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571986808] [2020-12-22 23:59:15,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:00:11,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 00:00:11,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:00:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 00:00:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:00:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 00:00:12,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:00:12,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 00:00:12,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143887422] [2020-12-23 00:00:12,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 00:00:12,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:00:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 00:00:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:00:12,063 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 51 states. [2020-12-23 00:00:12,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:00:12,255 INFO L93 Difference]: Finished difference Result 262 states and 274 transitions. [2020-12-23 00:00:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 00:00:12,255 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 149 [2020-12-23 00:00:12,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:00:12,256 INFO L225 Difference]: With dead ends: 262 [2020-12-23 00:00:12,256 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 00:00:12,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 00:00:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 00:00:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2020-12-23 00:00:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 00:00:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2020-12-23 00:00:12,264 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 149 [2020-12-23 00:00:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:00:12,264 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2020-12-23 00:00:12,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 00:00:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2020-12-23 00:00:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:00:12,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:00:12,265 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:00:12,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:00:12,479 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:00:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:00:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1358063601, now seen corresponding path program 36 times [2020-12-23 00:00:12,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:00:12,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442750955] [2020-12-23 00:00:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:00:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:00:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 00:00:13,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442750955] [2020-12-23 00:00:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847171836] [2020-12-23 00:00:13,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:00:14,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:00:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:00:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 00:00:14,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:00:14,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:00:14,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:00:14,299 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:00:14,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:00:14,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2020-12-23 00:00:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-12-23 00:00:15,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:00:15,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 21] total 70 [2020-12-23 00:00:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15557537] [2020-12-23 00:00:15,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 00:00:15,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:00:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 00:00:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=3500, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 00:00:15,383 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 70 states. [2020-12-23 00:00:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:00:19,003 INFO L93 Difference]: Finished difference Result 281 states and 294 transitions. [2020-12-23 00:00:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 00:00:19,003 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 151 [2020-12-23 00:00:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:00:19,004 INFO L225 Difference]: With dead ends: 281 [2020-12-23 00:00:19,004 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 00:00:19,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3895, Invalid=10867, Unknown=0, NotChecked=0, Total=14762 [2020-12-23 00:00:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 00:00:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2020-12-23 00:00:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:00:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-12-23 00:00:19,016 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 151 [2020-12-23 00:00:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:00:19,016 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-12-23 00:00:19,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 00:00:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-12-23 00:00:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 00:00:19,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:00:19,018 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 11, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:00:19,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 00:00:19,233 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:00:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:00:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash 913173462, now seen corresponding path program 10 times [2020-12-23 00:00:19,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:00:19,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136733823] [2020-12-23 00:00:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:00:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:00:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2598 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 00:00:20,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136733823] [2020-12-23 00:00:20,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876623025] [2020-12-23 00:00:20,703 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:00:20,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:00:20,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:00:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 00:00:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:00:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2598 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 00:00:21,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:00:21,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 00:00:21,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656230355] [2020-12-23 00:00:21,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 00:00:21,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:00:21,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 00:00:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:00:21,021 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 53 states. [2020-12-23 00:00:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:00:21,239 INFO L93 Difference]: Finished difference Result 274 states and 286 transitions. [2020-12-23 00:00:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:00:21,239 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2020-12-23 00:00:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:00:21,241 INFO L225 Difference]: With dead ends: 274 [2020-12-23 00:00:21,242 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 00:00:21,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:00:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 00:00:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-12-23 00:00:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 00:00:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 194 transitions. [2020-12-23 00:00:21,253 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 194 transitions. Word has length 154 [2020-12-23 00:00:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:00:21,253 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 194 transitions. [2020-12-23 00:00:21,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 00:00:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 194 transitions. [2020-12-23 00:00:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 00:00:21,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:00:21,255 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 11, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:00:21,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:00:21,469 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:00:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:00:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1291517352, now seen corresponding path program 11 times [2020-12-23 00:00:21,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:00:21,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626032487] [2020-12-23 00:00:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:00:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:00:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 00:00:22,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626032487] [2020-12-23 00:00:22,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218636021] [2020-12-23 00:00:22,981 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:21,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2020-12-23 00:01:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:21,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:01:21,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2020-12-23 00:01:21,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:21,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 14] total 65 [2020-12-23 00:01:21,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693976668] [2020-12-23 00:01:21,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 00:01:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 00:01:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1457, Invalid=2703, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 00:01:21,893 INFO L87 Difference]: Start difference. First operand 188 states and 194 transitions. Second operand 65 states. [2020-12-23 00:01:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:24,565 INFO L93 Difference]: Finished difference Result 412 states and 427 transitions. [2020-12-23 00:01:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 00:01:24,566 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 156 [2020-12-23 00:01:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:24,568 INFO L225 Difference]: With dead ends: 412 [2020-12-23 00:01:24,568 INFO L226 Difference]: Without dead ends: 327 [2020-12-23 00:01:24,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4875, Invalid=11127, Unknown=0, NotChecked=0, Total=16002 [2020-12-23 00:01:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-23 00:01:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 193. [2020-12-23 00:01:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 00:01:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-12-23 00:01:24,580 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 156 [2020-12-23 00:01:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:24,580 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-12-23 00:01:24,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 00:01:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-12-23 00:01:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:01:24,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:24,581 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:24,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 00:01:24,796 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1147112993, now seen corresponding path program 37 times [2020-12-23 00:01:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:24,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971221578] [2020-12-23 00:01:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2783 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 00:01:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971221578] [2020-12-23 00:01:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593277660] [2020-12-23 00:01:26,412 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 00:01:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2783 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 00:01:26,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:26,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 00:01:26,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629147103] [2020-12-23 00:01:26,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 00:01:26,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 00:01:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:01:26,694 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 55 states. [2020-12-23 00:01:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:26,923 INFO L93 Difference]: Finished difference Result 284 states and 298 transitions. [2020-12-23 00:01:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:01:26,924 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2020-12-23 00:01:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:26,927 INFO L225 Difference]: With dead ends: 284 [2020-12-23 00:01:26,927 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:01:26,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:01:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:01:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-23 00:01:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 00:01:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 202 transitions. [2020-12-23 00:01:26,940 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 202 transitions. Word has length 161 [2020-12-23 00:01:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:26,940 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 202 transitions. [2020-12-23 00:01:26,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 00:01:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 202 transitions. [2020-12-23 00:01:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-23 00:01:26,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:26,941 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:27,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 00:01:27,155 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -635666081, now seen corresponding path program 38 times [2020-12-23 00:01:27,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:27,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782604201] [2020-12-23 00:01:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2886 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 00:01:28,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782604201] [2020-12-23 00:01:28,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007575545] [2020-12-23 00:01:28,758 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:28,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:01:28,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:28,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 00:01:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2886 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 00:01:29,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:29,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 00:01:29,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429119731] [2020-12-23 00:01:29,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 00:01:29,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:29,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 00:01:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 00:01:29,035 INFO L87 Difference]: Start difference. First operand 195 states and 202 transitions. Second operand 56 states. [2020-12-23 00:01:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:29,245 INFO L93 Difference]: Finished difference Result 286 states and 300 transitions. [2020-12-23 00:01:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 00:01:29,246 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 163 [2020-12-23 00:01:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:29,249 INFO L225 Difference]: With dead ends: 286 [2020-12-23 00:01:29,249 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 00:01:29,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 00:01:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 00:01:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-12-23 00:01:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 00:01:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2020-12-23 00:01:29,259 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 163 [2020-12-23 00:01:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:29,259 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2020-12-23 00:01:29,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 00:01:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2020-12-23 00:01:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 00:01:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:29,260 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:29,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 00:01:29,475 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:29,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:29,475 INFO L82 PathProgramCache]: Analyzing trace with hash -194405091, now seen corresponding path program 39 times [2020-12-23 00:01:29,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:29,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739031693] [2020-12-23 00:01:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2991 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 00:01:31,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739031693] [2020-12-23 00:01:31,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881653806] [2020-12-23 00:01:31,072 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:31,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:01:31,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:01:31,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2991 backedges. 98 proven. 84 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2020-12-23 00:01:32,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:32,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 18] total 72 [2020-12-23 00:01:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704157346] [2020-12-23 00:01:32,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 00:01:32,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 00:01:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1636, Invalid=3476, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 00:01:32,007 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand 72 states. [2020-12-23 00:01:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:34,555 INFO L93 Difference]: Finished difference Result 318 states and 332 transitions. [2020-12-23 00:01:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 00:01:34,556 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 165 [2020-12-23 00:01:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:34,557 INFO L225 Difference]: With dead ends: 318 [2020-12-23 00:01:34,557 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 00:01:34,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5092, Invalid=10658, Unknown=0, NotChecked=0, Total=15750 [2020-12-23 00:01:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 00:01:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-12-23 00:01:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 00:01:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 205 transitions. [2020-12-23 00:01:34,567 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 205 transitions. Word has length 165 [2020-12-23 00:01:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:34,567 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 205 transitions. [2020-12-23 00:01:34,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 00:01:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 205 transitions. [2020-12-23 00:01:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 00:01:34,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:34,568 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 12, 11, 11, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:34,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 00:01:34,784 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash -240235529, now seen corresponding path program 12 times [2020-12-23 00:01:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:34,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854218025] [2020-12-23 00:01:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2020-12-23 00:01:36,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854218025] [2020-12-23 00:01:36,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661668787] [2020-12-23 00:01:36,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:37,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 00:01:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:01:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 11 proven. 187 refuted. 0 times theorem prover too weak. 2948 trivial. 0 not checked. [2020-12-23 00:01:38,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:38,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 15] total 70 [2020-12-23 00:01:38,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257139983] [2020-12-23 00:01:38,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 00:01:38,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:38,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 00:01:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1688, Invalid=3142, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 00:01:38,498 INFO L87 Difference]: Start difference. First operand 199 states and 205 transitions. Second operand 70 states. [2020-12-23 00:01:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:41,663 INFO L93 Difference]: Finished difference Result 426 states and 441 transitions. [2020-12-23 00:01:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 00:01:41,663 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 167 [2020-12-23 00:01:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:41,665 INFO L225 Difference]: With dead ends: 426 [2020-12-23 00:01:41,665 INFO L226 Difference]: Without dead ends: 338 [2020-12-23 00:01:41,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5663, Invalid=12969, Unknown=0, NotChecked=0, Total=18632 [2020-12-23 00:01:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-23 00:01:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 204. [2020-12-23 00:01:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:01:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2020-12-23 00:01:41,678 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 167 [2020-12-23 00:01:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:41,678 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2020-12-23 00:01:41,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 00:01:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2020-12-23 00:01:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 00:01:41,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:41,679 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:41,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:41,895 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash 104797158, now seen corresponding path program 40 times [2020-12-23 00:01:41,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:41,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910052269] [2020-12-23 00:01:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 00:01:43,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910052269] [2020-12-23 00:01:43,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072590083] [2020-12-23 00:01:43,814 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:01:43,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:01:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:01:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 00:01:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:01:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 00:01:44,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:01:44,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 00:01:44,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690440542] [2020-12-23 00:01:44,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 00:01:44,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:01:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 00:01:44,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 00:01:44,131 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand 59 states. [2020-12-23 00:01:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:01:44,389 INFO L93 Difference]: Finished difference Result 298 states and 312 transitions. [2020-12-23 00:01:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 00:01:44,390 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 172 [2020-12-23 00:01:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:01:44,391 INFO L225 Difference]: With dead ends: 298 [2020-12-23 00:01:44,391 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 00:01:44,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 00:01:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 00:01:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2020-12-23 00:01:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 00:01:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 213 transitions. [2020-12-23 00:01:44,401 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 213 transitions. Word has length 172 [2020-12-23 00:01:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:01:44,401 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 213 transitions. [2020-12-23 00:01:44,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 00:01:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 213 transitions. [2020-12-23 00:01:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 00:01:44,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:01:44,403 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:01:44,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 00:01:44,616 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:01:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:01:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1073892840, now seen corresponding path program 41 times [2020-12-23 00:01:44,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:01:44,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607182435] [2020-12-23 00:01:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:01:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:01:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3342 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 00:01:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607182435] [2020-12-23 00:01:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198827806] [2020-12-23 00:01:46,603 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true