/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-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:05:33,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:05:33,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:05:33,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:05:33,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:05:33,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:05:33,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:05:33,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:05:33,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:05:33,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:05:33,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:05:33,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:05:33,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:05:33,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:05:33,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:05:33,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:05:33,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:05:33,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:05:33,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:05:33,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:05:33,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:05:33,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:05:33,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:05:33,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:05:33,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:05:33,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:05:33,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:05:33,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:05:33,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:05:33,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:05:33,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:05:33,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:05:33,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:05:33,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:05:33,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:05:33,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:05:33,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:05:33,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:05:33,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:05:33,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:05:33,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:05:33,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:05:33,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:05:33,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:05:33,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:05:33,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:05:33,565 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:05:33,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:05:33,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:05:33,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:05:33,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:05:33,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:05:33,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:05:33,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:05:33,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:05:33,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:05:33,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:05:33,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:05:33,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:05:33,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:05:33,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:05:33,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:05:33,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:05:33,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:05:33,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:05:33,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:05:33,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:05:33,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:05:33,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:05:33,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:05:33,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:05:33,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:05:33,977 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:05:33,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2021-01-06 10:05:34,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/797ed2576/b1a2055b775a4afea6203b1d9d4a0e3b/FLAGd8e7d0bfa [2021-01-06 10:05:34,682 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:05:34,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2021-01-06 10:05:34,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/797ed2576/b1a2055b775a4afea6203b1d9d4a0e3b/FLAGd8e7d0bfa [2021-01-06 10:05:35,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/797ed2576/b1a2055b775a4afea6203b1d9d4a0e3b [2021-01-06 10:05:35,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:05:35,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:05:35,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:35,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:05:35,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:05:35,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128d71c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35, skipping insertion in model container [2021-01-06 10:05:35,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:05:35,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:05:35,259 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-industry-pattern/array_assert_loop_dep.i[814,827] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]] [2021-01-06 10:05:35,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:35,288 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:05:35,302 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-industry-pattern/array_assert_loop_dep.i[814,827] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]]]] [2021-01-06 10:05:35,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:35,324 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:05:35,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35 WrapperNode [2021-01-06 10:05:35,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:35,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:35,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:05:35,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:05:35,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:35,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:05:35,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:05:35,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:05:35,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... [2021-01-06 10:05:35,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:05:35,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:05:35,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:05:35,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:05:35,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:05:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:05:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:05:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:05:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:05:35,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:05:35,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:05:35,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:05:35,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:05:35,739 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:05:35,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:35 BoogieIcfgContainer [2021-01-06 10:05:35,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:05:35,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:05:35,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:05:35,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:05:35,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:05:35" (1/3) ... [2021-01-06 10:05:35,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635231a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:35, skipping insertion in model container [2021-01-06 10:05:35,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:35" (2/3) ... [2021-01-06 10:05:35,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635231a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:35, skipping insertion in model container [2021-01-06 10:05:35,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:35" (3/3) ... [2021-01-06 10:05:35,751 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2021-01-06 10:05:35,758 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:05:35,766 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:05:35,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:05:35,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:05:35,840 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:05:35,840 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:05:35,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:05:35,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:05:35,841 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:05:35,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:05:35,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:05:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 10:05:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 10:05:35,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:35,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:35,915 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:35,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2021-01-06 10:05:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:35,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705386451] [2021-01-06 10:05:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705386451] [2021-01-06 10:05:36,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:05:36,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:05:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938075032] [2021-01-06 10:05:36,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:05:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:05:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:05:36,336 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2021-01-06 10:05:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:36,412 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-01-06 10:05:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:05:36,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 10:05:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:36,425 INFO L225 Difference]: With dead ends: 37 [2021-01-06 10:05:36,426 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:05:36,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:05:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:05:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-01-06 10:05:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:05:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-01-06 10:05:36,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2021-01-06 10:05:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:36,469 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-01-06 10:05:36,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:05:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-01-06 10:05:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:05:36,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:36,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:36,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:05:36,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2021-01-06 10:05:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:36,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881694407] [2021-01-06 10:05:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:36,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881694407] [2021-01-06 10:05:36,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696294543] [2021-01-06 10:05:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:36,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:05:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:36,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:05:36,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569832133] [2021-01-06 10:05:36,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:05:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:36,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:05:36,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:36,675 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2021-01-06 10:05:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:36,726 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-01-06 10:05:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:05:36,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 10:05:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:36,728 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:05:36,728 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:05:36,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:05:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-01-06 10:05:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:05:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:05:36,736 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-01-06 10:05:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:36,737 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:05:36,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:05:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:05:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:05:36,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:36,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:36,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:05:36,954 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:36,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2021-01-06 10:05:36,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:36,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998338364] [2021-01-06 10:05:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:37,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998338364] [2021-01-06 10:05:37,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920914233] [2021-01-06 10:05:37,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:37,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:05:37,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:37,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:37,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:05:37,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179989236] [2021-01-06 10:05:37,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:05:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:05:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:37,161 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2021-01-06 10:05:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:37,217 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-01-06 10:05:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:05:37,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-06 10:05:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:37,219 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:05:37,219 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:05:37,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:05:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-01-06 10:05:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:05:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 10:05:37,227 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2021-01-06 10:05:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:37,227 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 10:05:37,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:05:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 10:05:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:05:37,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:37,228 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:37,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:37,443 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2021-01-06 10:05:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:37,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142115050] [2021-01-06 10:05:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142115050] [2021-01-06 10:05:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301161887] [2021-01-06 10:05:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:37,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:05:37,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:05:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:37,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:37,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:05:37,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709714918] [2021-01-06 10:05:37,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:05:37,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:05:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:37,655 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2021-01-06 10:05:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:37,720 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-01-06 10:05:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:05:37,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-01-06 10:05:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:37,722 INFO L225 Difference]: With dead ends: 70 [2021-01-06 10:05:37,722 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 10:05:37,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 10:05:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-01-06 10:05:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:05:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-01-06 10:05:37,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-01-06 10:05:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:37,732 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-01-06 10:05:37,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:05:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-01-06 10:05:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:05:37,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:37,733 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:37,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:37,948 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2021-01-06 10:05:37,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:37,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59700023] [2021-01-06 10:05:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59700023] [2021-01-06 10:05:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744255194] [2021-01-06 10:05:38,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:38,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:05:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:38,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:38,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:05:38,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345825897] [2021-01-06 10:05:38,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:05:38,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:05:38,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:05:38,184 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2021-01-06 10:05:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:38,288 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-01-06 10:05:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:05:38,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-06 10:05:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:38,294 INFO L225 Difference]: With dead ends: 84 [2021-01-06 10:05:38,294 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 10:05:38,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:05:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 10:05:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2021-01-06 10:05:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:05:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-01-06 10:05:38,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 15 [2021-01-06 10:05:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:38,320 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-01-06 10:05:38,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:05:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-01-06 10:05:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:05:38,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:38,322 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:38,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:38,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2021-01-06 10:05:38,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:38,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577779245] [2021-01-06 10:05:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:38,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577779245] [2021-01-06 10:05:38,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304494431] [2021-01-06 10:05:38,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:38,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:05:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:05:38,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:38,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:38,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:05:38,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259884248] [2021-01-06 10:05:38,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:05:38,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:05:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:05:38,777 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2021-01-06 10:05:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:38,866 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-01-06 10:05:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:05:38,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 10:05:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:38,868 INFO L225 Difference]: With dead ends: 98 [2021-01-06 10:05:38,868 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:05:38,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:05:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:05:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-01-06 10:05:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:05:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-01-06 10:05:38,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 17 [2021-01-06 10:05:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:38,876 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-01-06 10:05:38,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:05:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-01-06 10:05:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:05:38,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:38,877 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:39,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:05:39,091 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2021-01-06 10:05:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:39,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431355880] [2021-01-06 10:05:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431355880] [2021-01-06 10:05:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513457487] [2021-01-06 10:05:39,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:39,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:05:39,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:05:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:39,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:39,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:05:39,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635947177] [2021-01-06 10:05:39,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:05:39,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:05:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:05:39,344 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2021-01-06 10:05:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:39,443 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2021-01-06 10:05:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:05:39,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 10:05:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:39,444 INFO L225 Difference]: With dead ends: 112 [2021-01-06 10:05:39,444 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:05:39,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:05:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:05:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-01-06 10:05:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:05:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-01-06 10:05:39,452 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 19 [2021-01-06 10:05:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:39,452 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-01-06 10:05:39,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:05:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-01-06 10:05:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:05:39,453 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:39,453 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:39,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:39,668 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2021-01-06 10:05:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:39,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642970680] [2021-01-06 10:05:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642970680] [2021-01-06 10:05:39,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111819629] [2021-01-06 10:05:39,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:05:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:39,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:05:39,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475564919] [2021-01-06 10:05:39,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:05:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:05:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:05:39,873 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2021-01-06 10:05:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:39,973 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2021-01-06 10:05:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:05:39,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2021-01-06 10:05:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:39,975 INFO L225 Difference]: With dead ends: 126 [2021-01-06 10:05:39,975 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:05:39,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:05:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:05:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-01-06 10:05:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:05:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-01-06 10:05:39,982 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 21 [2021-01-06 10:05:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:39,982 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-01-06 10:05:39,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:05:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-01-06 10:05:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:05:39,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:39,984 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:40,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:40,198 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2021-01-06 10:05:40,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:40,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138085919] [2021-01-06 10:05:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:40,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138085919] [2021-01-06 10:05:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942921850] [2021-01-06 10:05:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:40,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:05:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:40,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:40,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:05:40,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125628946] [2021-01-06 10:05:40,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:05:40,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:05:40,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:05:40,448 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2021-01-06 10:05:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:40,555 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-01-06 10:05:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:05:40,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2021-01-06 10:05:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:40,556 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:05:40,556 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:05:40,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:05:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:05:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-01-06 10:05:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:05:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-01-06 10:05:40,563 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2021-01-06 10:05:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:40,564 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-01-06 10:05:40,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:05:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-01-06 10:05:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:05:40,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:40,565 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:40,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:05:40,779 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2021-01-06 10:05:40,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:40,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58507547] [2021-01-06 10:05:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:40,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58507547] [2021-01-06 10:05:40,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929476661] [2021-01-06 10:05:40,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:40,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:05:40,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:40,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:05:40,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:41,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:41,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:05:41,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739954470] [2021-01-06 10:05:41,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:05:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:05:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:05:41,028 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 13 states. [2021-01-06 10:05:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:41,142 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-01-06 10:05:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:05:41,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2021-01-06 10:05:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:41,143 INFO L225 Difference]: With dead ends: 154 [2021-01-06 10:05:41,144 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 10:05:41,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:05:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 10:05:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-01-06 10:05:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:05:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-01-06 10:05:41,151 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2021-01-06 10:05:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:41,151 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-01-06 10:05:41,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:05:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-01-06 10:05:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:05:41,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:41,152 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:41,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:41,367 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2021-01-06 10:05:41,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:41,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619326611] [2021-01-06 10:05:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:41,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619326611] [2021-01-06 10:05:41,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639536716] [2021-01-06 10:05:41,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:41,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:41,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:05:41,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:41,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:41,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:05:41,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835962524] [2021-01-06 10:05:41,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:05:41,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:05:41,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:05:41,633 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 14 states. [2021-01-06 10:05:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:41,775 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-01-06 10:05:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:05:41,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2021-01-06 10:05:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:41,779 INFO L225 Difference]: With dead ends: 168 [2021-01-06 10:05:41,779 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 10:05:41,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:05:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 10:05:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2021-01-06 10:05:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:05:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-01-06 10:05:41,799 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2021-01-06 10:05:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:41,800 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-01-06 10:05:41,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:05:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-01-06 10:05:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:05:41,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:41,808 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:42,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:42,023 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2021-01-06 10:05:42,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:42,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104347841] [2021-01-06 10:05:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104347841] [2021-01-06 10:05:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842747569] [2021-01-06 10:05:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:42,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:05:42,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:05:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:42,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:42,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:05:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93320402] [2021-01-06 10:05:42,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:05:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:05:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:05:42,358 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 15 states. [2021-01-06 10:05:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:42,497 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2021-01-06 10:05:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:05:42,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2021-01-06 10:05:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:42,499 INFO L225 Difference]: With dead ends: 182 [2021-01-06 10:05:42,499 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 10:05:42,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:05:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 10:05:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-01-06 10:05:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 10:05:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-01-06 10:05:42,510 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 29 [2021-01-06 10:05:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:42,511 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-01-06 10:05:42,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:05:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-01-06 10:05:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:05:42,512 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:42,512 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:42,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:05:42,728 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2021-01-06 10:05:42,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:42,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387710590] [2021-01-06 10:05:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387710590] [2021-01-06 10:05:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098323491] [2021-01-06 10:05:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:43,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:05:43,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:43,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:05:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:43,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:43,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:05:43,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703686992] [2021-01-06 10:05:43,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:05:43,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:05:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:05:43,193 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 16 states. [2021-01-06 10:05:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:43,349 INFO L93 Difference]: Finished difference Result 196 states and 213 transitions. [2021-01-06 10:05:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:05:43,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2021-01-06 10:05:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:43,350 INFO L225 Difference]: With dead ends: 196 [2021-01-06 10:05:43,350 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 10:05:43,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:05:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 10:05:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2021-01-06 10:05:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 10:05:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-01-06 10:05:43,364 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 31 [2021-01-06 10:05:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:43,365 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-01-06 10:05:43,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:05:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-01-06 10:05:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:05:43,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:43,367 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:43,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:05:43,582 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2021-01-06 10:05:43,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:43,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662534283] [2021-01-06 10:05:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:43,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662534283] [2021-01-06 10:05:43,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492489895] [2021-01-06 10:05:43,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:05:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:43,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:43,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:05:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131187289] [2021-01-06 10:05:43,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:05:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:05:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:05:43,883 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 17 states. [2021-01-06 10:05:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:44,044 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2021-01-06 10:05:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:05:44,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2021-01-06 10:05:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:44,046 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:05:44,046 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 10:05:44,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:05:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 10:05:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-01-06 10:05:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:05:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-01-06 10:05:44,055 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 33 [2021-01-06 10:05:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:44,055 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-01-06 10:05:44,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:05:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-01-06 10:05:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:05:44,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:44,056 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:44,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:05:44,270 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2021-01-06 10:05:44,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:44,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143294615] [2021-01-06 10:05:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:44,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143294615] [2021-01-06 10:05:44,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407852985] [2021-01-06 10:05:44,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:44,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:44,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:05:44,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:44,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:44,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:05:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933892731] [2021-01-06 10:05:44,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:05:44,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:44,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:05:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:05:44,586 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 18 states. [2021-01-06 10:05:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:44,772 INFO L93 Difference]: Finished difference Result 224 states and 243 transitions. [2021-01-06 10:05:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:05:44,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2021-01-06 10:05:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:44,773 INFO L225 Difference]: With dead ends: 224 [2021-01-06 10:05:44,773 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:05:44,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:05:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:05:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2021-01-06 10:05:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 10:05:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-01-06 10:05:44,779 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 35 [2021-01-06 10:05:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:44,779 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-01-06 10:05:44,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:05:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-01-06 10:05:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:05:44,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:44,780 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:44,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:44,995 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2021-01-06 10:05:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:44,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581474193] [2021-01-06 10:05:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:45,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581474193] [2021-01-06 10:05:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131880057] [2021-01-06 10:05:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:45,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 10:05:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:45,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:05:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:45,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:45,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:05:45,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486740782] [2021-01-06 10:05:45,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:05:45,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:05:45,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:05:45,417 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 19 states. [2021-01-06 10:05:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:45,591 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2021-01-06 10:05:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:05:45,591 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2021-01-06 10:05:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:45,593 INFO L225 Difference]: With dead ends: 238 [2021-01-06 10:05:45,593 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 10:05:45,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:05:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 10:05:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2021-01-06 10:05:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:05:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2021-01-06 10:05:45,601 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 37 [2021-01-06 10:05:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:45,602 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2021-01-06 10:05:45,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:05:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2021-01-06 10:05:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:05:45,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:45,603 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:45,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:05:45,817 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2021-01-06 10:05:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:45,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690601123] [2021-01-06 10:05:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690601123] [2021-01-06 10:05:46,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098033508] [2021-01-06 10:05:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:46,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:46,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:46,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:05:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:46,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:46,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:05:46,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923265542] [2021-01-06 10:05:46,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:05:46,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:05:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:05:46,301 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand 20 states. [2021-01-06 10:05:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:46,485 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2021-01-06 10:05:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:05:46,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2021-01-06 10:05:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:46,487 INFO L225 Difference]: With dead ends: 252 [2021-01-06 10:05:46,487 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 10:05:46,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:05:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 10:05:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2021-01-06 10:05:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 10:05:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2021-01-06 10:05:46,494 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 39 [2021-01-06 10:05:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:46,495 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2021-01-06 10:05:46,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:05:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2021-01-06 10:05:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:05:46,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:46,496 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:46,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:05:46,710 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2021-01-06 10:05:46,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:46,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654178647] [2021-01-06 10:05:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:46,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654178647] [2021-01-06 10:05:46,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346236357] [2021-01-06 10:05:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:47,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 10:05:47,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:05:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:47,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:47,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:05:47,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354539228] [2021-01-06 10:05:47,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:05:47,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:05:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:05:47,218 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 21 states. [2021-01-06 10:05:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:47,423 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2021-01-06 10:05:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:05:47,423 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2021-01-06 10:05:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:47,425 INFO L225 Difference]: With dead ends: 266 [2021-01-06 10:05:47,425 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:05:47,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:05:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:05:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2021-01-06 10:05:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:05:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-01-06 10:05:47,430 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 41 [2021-01-06 10:05:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:47,431 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-01-06 10:05:47,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:05:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-01-06 10:05:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:05:47,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:47,432 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:47,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:05:47,645 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2021-01-06 10:05:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:47,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387953594] [2021-01-06 10:05:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:47,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387953594] [2021-01-06 10:05:47,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473865041] [2021-01-06 10:05:47,941 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 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 [2021-01-06 10:05:48,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:05:48,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:05:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:48,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:48,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:05:48,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55718643] [2021-01-06 10:05:48,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:05:48,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:05:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:05:48,608 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand 22 states. [2021-01-06 10:05:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:48,807 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2021-01-06 10:05:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:05:48,808 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2021-01-06 10:05:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:48,809 INFO L225 Difference]: With dead ends: 280 [2021-01-06 10:05:48,809 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 10:05:48,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:05:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 10:05:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 143. [2021-01-06 10:05:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 10:05:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2021-01-06 10:05:48,816 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 43 [2021-01-06 10:05:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:48,816 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2021-01-06 10:05:48,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:05:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2021-01-06 10:05:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:05:48,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:48,817 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:49,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:49,031 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2021-01-06 10:05:49,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:49,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574220605] [2021-01-06 10:05:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:49,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574220605] [2021-01-06 10:05:49,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216292336] [2021-01-06 10:05:49,360 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 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 [2021-01-06 10:05:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:05:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:49,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:49,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:05:49,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792151261] [2021-01-06 10:05:49,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:05:49,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:49,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:05:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:05:49,496 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand 23 states. [2021-01-06 10:05:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:49,720 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2021-01-06 10:05:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:05:49,721 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2021-01-06 10:05:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:49,723 INFO L225 Difference]: With dead ends: 294 [2021-01-06 10:05:49,723 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 10:05:49,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:05:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 10:05:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2021-01-06 10:05:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:05:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2021-01-06 10:05:49,730 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 45 [2021-01-06 10:05:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:49,730 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2021-01-06 10:05:49,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:05:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2021-01-06 10:05:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:05:49,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:49,731 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:49,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:49,946 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2021-01-06 10:05:49,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:49,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599989686] [2021-01-06 10:05:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:50,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599989686] [2021-01-06 10:05:50,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183932181] [2021-01-06 10:05:50,258 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 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 [2021-01-06 10:05:50,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:50,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:05:50,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:50,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:50,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:05:50,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913799134] [2021-01-06 10:05:50,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:05:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:50,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:05:50,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:05:50,414 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 24 states. [2021-01-06 10:05:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:50,657 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2021-01-06 10:05:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:05:50,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2021-01-06 10:05:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:50,658 INFO L225 Difference]: With dead ends: 308 [2021-01-06 10:05:50,659 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 10:05:50,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:05:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 10:05:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 157. [2021-01-06 10:05:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 10:05:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2021-01-06 10:05:50,667 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2021-01-06 10:05:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:50,667 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2021-01-06 10:05:50,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:05:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2021-01-06 10:05:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:05:50,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:50,668 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:50,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:05:50,882 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:50,882 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2021-01-06 10:05:50,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:50,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576391026] [2021-01-06 10:05:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:51,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576391026] [2021-01-06 10:05:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744197749] [2021-01-06 10:05:51,223 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 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 [2021-01-06 10:05:51,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 10:05:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:05:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:51,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:51,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:05:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20926639] [2021-01-06 10:05:51,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:05:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:51,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:05:51,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:05:51,637 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 25 states. [2021-01-06 10:05:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:51,894 INFO L93 Difference]: Finished difference Result 322 states and 348 transitions. [2021-01-06 10:05:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:05:51,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2021-01-06 10:05:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:51,898 INFO L225 Difference]: With dead ends: 322 [2021-01-06 10:05:51,898 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 10:05:51,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:05:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 10:05:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 164. [2021-01-06 10:05:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:05:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2021-01-06 10:05:51,904 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 49 [2021-01-06 10:05:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:51,904 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2021-01-06 10:05:51,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:05:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2021-01-06 10:05:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:05:51,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:51,905 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:52,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:05:52,119 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2021-01-06 10:05:52,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:52,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426937408] [2021-01-06 10:05:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:52,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426937408] [2021-01-06 10:05:52,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749260707] [2021-01-06 10:05:52,537 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 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 [2021-01-06 10:05:52,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:05:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:52,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:52,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 10:05:52,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453928418] [2021-01-06 10:05:52,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:05:52,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:05:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:05:52,667 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand 26 states. [2021-01-06 10:05:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:52,944 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2021-01-06 10:05:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:05:52,944 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2021-01-06 10:05:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:52,946 INFO L225 Difference]: With dead ends: 336 [2021-01-06 10:05:52,946 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 10:05:52,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:05:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 10:05:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2021-01-06 10:05:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 10:05:52,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2021-01-06 10:05:52,953 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 51 [2021-01-06 10:05:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:52,953 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2021-01-06 10:05:52,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:05:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2021-01-06 10:05:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:05:52,954 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:52,954 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:53,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:53,168 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2021-01-06 10:05:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:53,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629089106] [2021-01-06 10:05:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:53,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629089106] [2021-01-06 10:05:53,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874619527] [2021-01-06 10:05:53,619 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 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 [2021-01-06 10:05:54,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 10:05:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:05:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:54,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:54,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 10:05:54,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802633881] [2021-01-06 10:05:54,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:05:54,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:05:54,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:05:54,088 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 27 states. [2021-01-06 10:05:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:54,383 INFO L93 Difference]: Finished difference Result 350 states and 378 transitions. [2021-01-06 10:05:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:05:54,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2021-01-06 10:05:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:54,386 INFO L225 Difference]: With dead ends: 350 [2021-01-06 10:05:54,386 INFO L226 Difference]: Without dead ends: 228 [2021-01-06 10:05:54,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:05:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-01-06 10:05:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-01-06 10:05:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:05:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2021-01-06 10:05:54,400 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 53 [2021-01-06 10:05:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:54,400 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2021-01-06 10:05:54,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:05:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2021-01-06 10:05:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:05:54,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:54,403 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:54,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:05:54,618 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2021-01-06 10:05:54,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:54,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052039642] [2021-01-06 10:05:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:55,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052039642] [2021-01-06 10:05:55,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180118433] [2021-01-06 10:05:55,079 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 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 [2021-01-06 10:05:58,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 10:05:58,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:05:58,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:58,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:58,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:05:58,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127679145] [2021-01-06 10:05:58,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:05:58,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:05:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:05:58,168 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand 28 states. [2021-01-06 10:05:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:58,490 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2021-01-06 10:05:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:05:58,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2021-01-06 10:05:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:58,492 INFO L225 Difference]: With dead ends: 364 [2021-01-06 10:05:58,492 INFO L226 Difference]: Without dead ends: 237 [2021-01-06 10:05:58,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:05:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-01-06 10:05:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 185. [2021-01-06 10:05:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 10:05:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2021-01-06 10:05:58,500 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 55 [2021-01-06 10:05:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:58,500 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2021-01-06 10:05:58,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:05:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2021-01-06 10:05:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:05:58,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:58,501 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:58,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:58,715 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1300597277, now seen corresponding path program 25 times [2021-01-06 10:05:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:58,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37443281] [2021-01-06 10:05:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:59,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37443281] [2021-01-06 10:05:59,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402320052] [2021-01-06 10:05:59,203 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 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 [2021-01-06 10:05:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:05:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:59,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:59,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:05:59,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065383925] [2021-01-06 10:05:59,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:05:59,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:05:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:05:59,356 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand 29 states. [2021-01-06 10:05:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:59,678 INFO L93 Difference]: Finished difference Result 378 states and 408 transitions. [2021-01-06 10:05:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:05:59,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2021-01-06 10:05:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:59,680 INFO L225 Difference]: With dead ends: 378 [2021-01-06 10:05:59,680 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 10:05:59,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:05:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 10:05:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 192. [2021-01-06 10:05:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 10:05:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 220 transitions. [2021-01-06 10:05:59,688 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 220 transitions. Word has length 57 [2021-01-06 10:05:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:59,688 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 220 transitions. [2021-01-06 10:05:59,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:05:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 220 transitions. [2021-01-06 10:05:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:05:59,689 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:59,689 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:59,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:05:59,904 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882843, now seen corresponding path program 26 times [2021-01-06 10:05:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:59,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734249002] [2021-01-06 10:05:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:00,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734249002] [2021-01-06 10:06:00,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823944650] [2021-01-06 10:06:00,441 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 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 [2021-01-06 10:06:00,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:06:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:00,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:00,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:06:00,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741499654] [2021-01-06 10:06:00,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:06:00,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:06:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:06:00,606 INFO L87 Difference]: Start difference. First operand 192 states and 220 transitions. Second operand 30 states. [2021-01-06 10:06:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:00,909 INFO L93 Difference]: Finished difference Result 392 states and 423 transitions. [2021-01-06 10:06:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:06:00,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2021-01-06 10:06:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:00,920 INFO L225 Difference]: With dead ends: 392 [2021-01-06 10:06:00,920 INFO L226 Difference]: Without dead ends: 255 [2021-01-06 10:06:00,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:06:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-01-06 10:06:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 199. [2021-01-06 10:06:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 10:06:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 228 transitions. [2021-01-06 10:06:00,928 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 228 transitions. Word has length 59 [2021-01-06 10:06:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:00,928 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 228 transitions. [2021-01-06 10:06:00,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:06:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 228 transitions. [2021-01-06 10:06:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:06:00,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:00,929 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:01,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:06:01,141 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash 654124313, now seen corresponding path program 27 times [2021-01-06 10:06:01,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:01,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930357410] [2021-01-06 10:06:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930357410] [2021-01-06 10:06:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085787050] [2021-01-06 10:06:01,717 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 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 [2021-01-06 10:06:02,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 10:06:02,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:06:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:02,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:02,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:06:02,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567046804] [2021-01-06 10:06:02,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:06:02,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:02,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:06:02,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:06:02,433 INFO L87 Difference]: Start difference. First operand 199 states and 228 transitions. Second operand 31 states. [2021-01-06 10:06:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:02,776 INFO L93 Difference]: Finished difference Result 406 states and 438 transitions. [2021-01-06 10:06:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:06:02,777 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2021-01-06 10:06:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:02,778 INFO L225 Difference]: With dead ends: 406 [2021-01-06 10:06:02,778 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 10:06:02,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:06:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 10:06:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 206. [2021-01-06 10:06:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2021-01-06 10:06:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2021-01-06 10:06:02,785 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 61 [2021-01-06 10:06:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:02,785 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2021-01-06 10:06:02,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:06:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2021-01-06 10:06:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:06:02,786 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:02,786 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:03,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:06:03,001 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:03,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1101344937, now seen corresponding path program 28 times [2021-01-06 10:06:03,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:03,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028419197] [2021-01-06 10:06:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028419197] [2021-01-06 10:06:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655103740] [2021-01-06 10:06:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:06:03,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:03,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:03,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:06:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:03,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 10:06:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091767116] [2021-01-06 10:06:03,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:06:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:06:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:06:03,766 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand 32 states. [2021-01-06 10:06:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:04,103 INFO L93 Difference]: Finished difference Result 420 states and 453 transitions. [2021-01-06 10:06:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:06:04,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2021-01-06 10:06:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:04,106 INFO L225 Difference]: With dead ends: 420 [2021-01-06 10:06:04,106 INFO L226 Difference]: Without dead ends: 273 [2021-01-06 10:06:04,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:06:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-01-06 10:06:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2021-01-06 10:06:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-01-06 10:06:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2021-01-06 10:06:04,113 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 63 [2021-01-06 10:06:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:04,114 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2021-01-06 10:06:04,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:06:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2021-01-06 10:06:04,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:06:04,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:04,114 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:04,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:06:04,330 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash -185146859, now seen corresponding path program 29 times [2021-01-06 10:06:04,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708572681] [2021-01-06 10:06:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:05,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708572681] [2021-01-06 10:06:05,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041315916] [2021-01-06 10:06:05,008 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 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 [2021-01-06 10:06:05,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 10:06:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:06:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:05,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:05,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 10:06:05,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120581970] [2021-01-06 10:06:05,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:06:05,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:06:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:06:05,748 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand 33 states. [2021-01-06 10:06:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:06,130 INFO L93 Difference]: Finished difference Result 434 states and 468 transitions. [2021-01-06 10:06:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:06:06,131 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2021-01-06 10:06:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:06,132 INFO L225 Difference]: With dead ends: 434 [2021-01-06 10:06:06,133 INFO L226 Difference]: Without dead ends: 282 [2021-01-06 10:06:06,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:06:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-01-06 10:06:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2021-01-06 10:06:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2021-01-06 10:06:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 252 transitions. [2021-01-06 10:06:06,141 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 252 transitions. Word has length 65 [2021-01-06 10:06:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:06,141 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 252 transitions. [2021-01-06 10:06:06,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:06:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 252 transitions. [2021-01-06 10:06:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:06:06,142 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:06,142 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:06,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:06,357 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash -187089581, now seen corresponding path program 30 times [2021-01-06 10:06:06,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:06,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030914126] [2021-01-06 10:06:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:07,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030914126] [2021-01-06 10:06:07,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448091966] [2021-01-06 10:06:07,076 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 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 [2021-01-06 10:06:10,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 10:06:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:06:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:10,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:10,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:06:10,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504055171] [2021-01-06 10:06:10,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:06:10,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:06:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:06:10,208 INFO L87 Difference]: Start difference. First operand 220 states and 252 transitions. Second operand 34 states. [2021-01-06 10:06:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:10,621 INFO L93 Difference]: Finished difference Result 448 states and 483 transitions. [2021-01-06 10:06:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:06:10,621 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2021-01-06 10:06:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:10,623 INFO L225 Difference]: With dead ends: 448 [2021-01-06 10:06:10,623 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 10:06:10,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:06:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 10:06:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 227. [2021-01-06 10:06:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 10:06:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 260 transitions. [2021-01-06 10:06:10,631 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 260 transitions. Word has length 67 [2021-01-06 10:06:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:10,631 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 260 transitions. [2021-01-06 10:06:10,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:06:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 260 transitions. [2021-01-06 10:06:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:06:10,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:10,632 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:10,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:10,848 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2054045423, now seen corresponding path program 31 times [2021-01-06 10:06:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:10,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884773] [2021-01-06 10:06:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:11,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884773] [2021-01-06 10:06:11,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636061843] [2021-01-06 10:06:11,604 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 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 [2021-01-06 10:06:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:06:11,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:11,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:11,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:06:11,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713920675] [2021-01-06 10:06:11,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:06:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:06:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:06:11,770 INFO L87 Difference]: Start difference. First operand 227 states and 260 transitions. Second operand 35 states. [2021-01-06 10:06:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:12,141 INFO L93 Difference]: Finished difference Result 462 states and 498 transitions. [2021-01-06 10:06:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:06:12,141 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2021-01-06 10:06:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:12,143 INFO L225 Difference]: With dead ends: 462 [2021-01-06 10:06:12,143 INFO L226 Difference]: Without dead ends: 300 [2021-01-06 10:06:12,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:06:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-01-06 10:06:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 234. [2021-01-06 10:06:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2021-01-06 10:06:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 268 transitions. [2021-01-06 10:06:12,151 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 268 transitions. Word has length 69 [2021-01-06 10:06:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:12,151 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 268 transitions. [2021-01-06 10:06:12,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:06:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 268 transitions. [2021-01-06 10:06:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:06:12,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:12,152 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:12,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:12,366 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:12,367 INFO L82 PathProgramCache]: Analyzing trace with hash -902279857, now seen corresponding path program 32 times [2021-01-06 10:06:12,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:12,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353863052] [2021-01-06 10:06:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:13,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353863052] [2021-01-06 10:06:13,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337243540] [2021-01-06 10:06:13,054 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 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 [2021-01-06 10:06:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:13,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:06:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:13,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:13,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 10:06:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79952942] [2021-01-06 10:06:13,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:06:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:13,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:06:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:06:13,227 INFO L87 Difference]: Start difference. First operand 234 states and 268 transitions. Second operand 36 states. [2021-01-06 10:06:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:13,636 INFO L93 Difference]: Finished difference Result 476 states and 513 transitions. [2021-01-06 10:06:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:06:13,637 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2021-01-06 10:06:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:13,639 INFO L225 Difference]: With dead ends: 476 [2021-01-06 10:06:13,639 INFO L226 Difference]: Without dead ends: 309 [2021-01-06 10:06:13,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:06:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-01-06 10:06:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 241. [2021-01-06 10:06:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2021-01-06 10:06:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2021-01-06 10:06:13,648 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 71 [2021-01-06 10:06:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:13,648 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2021-01-06 10:06:13,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:06:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2021-01-06 10:06:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:06:13,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:13,649 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:13,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:06:13,863 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:13,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2137833997, now seen corresponding path program 33 times [2021-01-06 10:06:13,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:13,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615961274] [2021-01-06 10:06:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615961274] [2021-01-06 10:06:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610738557] [2021-01-06 10:06:14,701 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 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 [2021-01-06 10:06:25,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 10:06:25,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:06:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:25,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:25,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 10:06:25,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664906069] [2021-01-06 10:06:25,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:06:25,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:25,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:06:25,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:06:25,354 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand 37 states. [2021-01-06 10:06:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:25,767 INFO L93 Difference]: Finished difference Result 490 states and 528 transitions. [2021-01-06 10:06:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:06:25,768 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2021-01-06 10:06:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:25,770 INFO L225 Difference]: With dead ends: 490 [2021-01-06 10:06:25,771 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 10:06:25,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:06:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 10:06:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 248. [2021-01-06 10:06:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2021-01-06 10:06:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 284 transitions. [2021-01-06 10:06:25,779 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 284 transitions. Word has length 73 [2021-01-06 10:06:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:25,779 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 284 transitions. [2021-01-06 10:06:25,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:06:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 284 transitions. [2021-01-06 10:06:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:06:25,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:25,780 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:25,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:25,995 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1185480885, now seen corresponding path program 34 times [2021-01-06 10:06:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:25,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012761934] [2021-01-06 10:06:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:26,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012761934] [2021-01-06 10:06:26,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979717194] [2021-01-06 10:06:26,851 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 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 [2021-01-06 10:06:26,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:26,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:06:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:27,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:27,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 10:06:27,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972233400] [2021-01-06 10:06:27,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:06:27,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:27,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:06:27,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:06:27,033 INFO L87 Difference]: Start difference. First operand 248 states and 284 transitions. Second operand 38 states. [2021-01-06 10:06:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:27,434 INFO L93 Difference]: Finished difference Result 504 states and 543 transitions. [2021-01-06 10:06:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:06:27,435 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2021-01-06 10:06:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:27,437 INFO L225 Difference]: With dead ends: 504 [2021-01-06 10:06:27,437 INFO L226 Difference]: Without dead ends: 327 [2021-01-06 10:06:27,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:06:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-01-06 10:06:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2021-01-06 10:06:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-01-06 10:06:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 292 transitions. [2021-01-06 10:06:27,445 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 292 transitions. Word has length 75 [2021-01-06 10:06:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:27,445 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 292 transitions. [2021-01-06 10:06:27,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:06:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 292 transitions. [2021-01-06 10:06:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:06:27,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:27,446 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:27,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:06:27,661 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 564585737, now seen corresponding path program 35 times [2021-01-06 10:06:27,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:27,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575591824] [2021-01-06 10:06:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:28,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575591824] [2021-01-06 10:06:28,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283242082] [2021-01-06 10:06:28,518 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 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 [2021-01-06 10:06:34,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 10:06:34,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:06:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:34,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:34,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 10:06:34,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172197174] [2021-01-06 10:06:34,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:06:34,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:34,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:06:34,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:06:34,137 INFO L87 Difference]: Start difference. First operand 255 states and 292 transitions. Second operand 39 states. [2021-01-06 10:06:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:34,553 INFO L93 Difference]: Finished difference Result 518 states and 558 transitions. [2021-01-06 10:06:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 10:06:34,554 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2021-01-06 10:06:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:34,556 INFO L225 Difference]: With dead ends: 518 [2021-01-06 10:06:34,556 INFO L226 Difference]: Without dead ends: 336 [2021-01-06 10:06:34,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:06:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-01-06 10:06:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2021-01-06 10:06:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-01-06 10:06:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2021-01-06 10:06:34,564 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 77 [2021-01-06 10:06:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:34,565 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2021-01-06 10:06:34,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:06:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2021-01-06 10:06:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:06:34,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:34,566 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:34,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:34,780 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:34,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1248570553, now seen corresponding path program 36 times [2021-01-06 10:06:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:34,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237437959] [2021-01-06 10:06:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:35,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237437959] [2021-01-06 10:06:35,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712008299] [2021-01-06 10:06:35,743 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 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 [2021-01-06 10:07:19,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 10:07:19,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:07:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:20,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:20,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:07:20,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699742857] [2021-01-06 10:07:20,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:07:20,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:07:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:07:20,069 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand 40 states. [2021-01-06 10:07:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:20,527 INFO L93 Difference]: Finished difference Result 532 states and 573 transitions. [2021-01-06 10:07:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:07:20,528 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2021-01-06 10:07:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:20,531 INFO L225 Difference]: With dead ends: 532 [2021-01-06 10:07:20,531 INFO L226 Difference]: Without dead ends: 345 [2021-01-06 10:07:20,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:07:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-01-06 10:07:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2021-01-06 10:07:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2021-01-06 10:07:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2021-01-06 10:07:20,538 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 79 [2021-01-06 10:07:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:20,539 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2021-01-06 10:07:20,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:07:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2021-01-06 10:07:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:07:20,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:20,540 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:20,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:07:20,741 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash 64956933, now seen corresponding path program 37 times [2021-01-06 10:07:20,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:20,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542827267] [2021-01-06 10:07:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:21,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542827267] [2021-01-06 10:07:21,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504622386] [2021-01-06 10:07:21,613 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 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 [2021-01-06 10:07:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:07:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:21,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:21,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:07:21,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129940125] [2021-01-06 10:07:21,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:07:21,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:07:21,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:07:21,805 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand 41 states. [2021-01-06 10:07:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:22,230 INFO L93 Difference]: Finished difference Result 546 states and 588 transitions. [2021-01-06 10:07:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:07:22,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2021-01-06 10:07:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:22,232 INFO L225 Difference]: With dead ends: 546 [2021-01-06 10:07:22,233 INFO L226 Difference]: Without dead ends: 354 [2021-01-06 10:07:22,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:07:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-01-06 10:07:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2021-01-06 10:07:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2021-01-06 10:07:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2021-01-06 10:07:22,241 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 81 [2021-01-06 10:07:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:22,241 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2021-01-06 10:07:22,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:07:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2021-01-06 10:07:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:07:22,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:22,242 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:22,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:07:22,456 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash -355514045, now seen corresponding path program 38 times [2021-01-06 10:07:22,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:22,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598199022] [2021-01-06 10:07:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:23,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598199022] [2021-01-06 10:07:23,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640937736] [2021-01-06 10:07:23,524 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 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 [2021-01-06 10:07:23,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:07:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:07:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:23,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:23,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 10:07:23,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933535799] [2021-01-06 10:07:23,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:07:23,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:23,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:07:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:07:23,700 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand 42 states. [2021-01-06 10:07:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:24,170 INFO L93 Difference]: Finished difference Result 560 states and 603 transitions. [2021-01-06 10:07:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:07:24,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2021-01-06 10:07:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:24,173 INFO L225 Difference]: With dead ends: 560 [2021-01-06 10:07:24,173 INFO L226 Difference]: Without dead ends: 363 [2021-01-06 10:07:24,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:07:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-01-06 10:07:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 283. [2021-01-06 10:07:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2021-01-06 10:07:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 324 transitions. [2021-01-06 10:07:24,184 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 324 transitions. Word has length 83 [2021-01-06 10:07:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:24,184 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 324 transitions. [2021-01-06 10:07:24,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:07:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 324 transitions. [2021-01-06 10:07:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 10:07:24,185 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:24,185 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:24,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:07:24,399 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash -701198079, now seen corresponding path program 39 times [2021-01-06 10:07:24,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:24,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365805210] [2021-01-06 10:07:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365805210] [2021-01-06 10:07:25,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036543761] [2021-01-06 10:07:25,543 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 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 [2021-01-06 10:07:57,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 10:07:57,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:07:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:57,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:57,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 10:07:57,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220312301] [2021-01-06 10:07:57,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 10:07:57,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:57,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 10:07:57,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:07:57,917 INFO L87 Difference]: Start difference. First operand 283 states and 324 transitions. Second operand 43 states. [2021-01-06 10:07:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:58,348 INFO L93 Difference]: Finished difference Result 574 states and 618 transitions. [2021-01-06 10:07:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:07:58,349 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2021-01-06 10:07:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:58,355 INFO L225 Difference]: With dead ends: 574 [2021-01-06 10:07:58,355 INFO L226 Difference]: Without dead ends: 372 [2021-01-06 10:07:58,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:07:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-01-06 10:07:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 290. [2021-01-06 10:07:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2021-01-06 10:07:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2021-01-06 10:07:58,362 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 85 [2021-01-06 10:07:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:58,363 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2021-01-06 10:07:58,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 10:07:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2021-01-06 10:07:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:07:58,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:58,364 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:58,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:07:58,578 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2103894335, now seen corresponding path program 40 times [2021-01-06 10:07:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:58,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417786177] [2021-01-06 10:07:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:59,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417786177] [2021-01-06 10:07:59,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235791239] [2021-01-06 10:07:59,750 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 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 [2021-01-06 10:07:59,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:07:59,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:07:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:59,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:59,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 10:07:59,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012814828] [2021-01-06 10:07:59,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:07:59,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:07:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:07:59,950 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand 44 states. [2021-01-06 10:08:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:08:00,494 INFO L93 Difference]: Finished difference Result 588 states and 633 transitions. [2021-01-06 10:08:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 10:08:00,495 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2021-01-06 10:08:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:08:00,497 INFO L225 Difference]: With dead ends: 588 [2021-01-06 10:08:00,497 INFO L226 Difference]: Without dead ends: 381 [2021-01-06 10:08:00,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:08:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-01-06 10:08:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 297. [2021-01-06 10:08:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2021-01-06 10:08:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 340 transitions. [2021-01-06 10:08:00,503 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 340 transitions. Word has length 87 [2021-01-06 10:08:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:08:00,504 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 340 transitions. [2021-01-06 10:08:00,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:08:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 340 transitions. [2021-01-06 10:08:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:08:00,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:08:00,505 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:08:00,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:08:00,720 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:08:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:08:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash 558242301, now seen corresponding path program 41 times [2021-01-06 10:08:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:08:00,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120208773] [2021-01-06 10:08:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:08:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:08:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:01,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120208773] [2021-01-06 10:08:01,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084010653] [2021-01-06 10:08:01,926 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 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 [2021-01-06 10:08:09,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 10:08:09,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:08:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:08:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:08:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:09,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:08:09,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 10:08:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9763347] [2021-01-06 10:08:09,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:08:09,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:08:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:08:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:08:09,251 INFO L87 Difference]: Start difference. First operand 297 states and 340 transitions. Second operand 45 states. [2021-01-06 10:08:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:08:09,828 INFO L93 Difference]: Finished difference Result 602 states and 648 transitions. [2021-01-06 10:08:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:08:09,829 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2021-01-06 10:08:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:08:09,831 INFO L225 Difference]: With dead ends: 602 [2021-01-06 10:08:09,831 INFO L226 Difference]: Without dead ends: 390 [2021-01-06 10:08:09,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:08:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-01-06 10:08:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 304. [2021-01-06 10:08:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2021-01-06 10:08:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 348 transitions. [2021-01-06 10:08:09,840 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 348 transitions. Word has length 89 [2021-01-06 10:08:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:08:09,840 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 348 transitions. [2021-01-06 10:08:09,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:08:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 348 transitions. [2021-01-06 10:08:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:08:09,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:08:09,841 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:08:10,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:08:10,054 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:08:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:08:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1245322043, now seen corresponding path program 42 times [2021-01-06 10:08:10,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:08:10,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547928490] [2021-01-06 10:08:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:08:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:08:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547928490] [2021-01-06 10:08:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835763356] [2021-01-06 10:08:11,384 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 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 [2021-01-06 10:09:58,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 10:09:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 10:09:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:59,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:59,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 10:09:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087660713] [2021-01-06 10:09:59,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 10:09:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 10:09:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:09:59,091 INFO L87 Difference]: Start difference. First operand 304 states and 348 transitions. Second operand 46 states. [2021-01-06 10:09:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:59,703 INFO L93 Difference]: Finished difference Result 616 states and 663 transitions. [2021-01-06 10:09:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:09:59,704 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2021-01-06 10:09:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:59,705 INFO L225 Difference]: With dead ends: 616 [2021-01-06 10:09:59,705 INFO L226 Difference]: Without dead ends: 399 [2021-01-06 10:09:59,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:09:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-01-06 10:09:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 311. [2021-01-06 10:09:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2021-01-06 10:09:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 356 transitions. [2021-01-06 10:09:59,713 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 356 transitions. Word has length 91 [2021-01-06 10:09:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:59,714 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 356 transitions. [2021-01-06 10:09:59,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 10:09:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 356 transitions. [2021-01-06 10:09:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 10:09:59,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:59,714 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:59,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:59,916 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash 103990521, now seen corresponding path program 43 times [2021-01-06 10:09:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:59,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835763331] [2021-01-06 10:09:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:01,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835763331] [2021-01-06 10:10:01,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723983698] [2021-01-06 10:10:01,259 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 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 [2021-01-06 10:10:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 10:10:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:01,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:01,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 10:10:01,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261751030] [2021-01-06 10:10:01,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:10:01,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:10:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:10:01,475 INFO L87 Difference]: Start difference. First operand 311 states and 356 transitions. Second operand 47 states. [2021-01-06 10:10:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:02,069 INFO L93 Difference]: Finished difference Result 630 states and 678 transitions. [2021-01-06 10:10:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 10:10:02,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2021-01-06 10:10:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:02,071 INFO L225 Difference]: With dead ends: 630 [2021-01-06 10:10:02,071 INFO L226 Difference]: Without dead ends: 408 [2021-01-06 10:10:02,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:10:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-01-06 10:10:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 318. [2021-01-06 10:10:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2021-01-06 10:10:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 364 transitions. [2021-01-06 10:10:02,078 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 364 transitions. Word has length 93 [2021-01-06 10:10:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:02,079 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 364 transitions. [2021-01-06 10:10:02,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:10:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 364 transitions. [2021-01-06 10:10:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 10:10:02,079 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:02,080 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:02,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:10:02,298 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1498941641, now seen corresponding path program 44 times [2021-01-06 10:10:02,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:02,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468428942] [2021-01-06 10:10:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:03,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468428942] [2021-01-06 10:10:03,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263544427] [2021-01-06 10:10:03,702 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 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 [2021-01-06 10:10:03,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:10:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:10:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:10:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:10:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:03,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:10:03,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 10:10:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637535949] [2021-01-06 10:10:03,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:10:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:10:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:10:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:10:03,914 INFO L87 Difference]: Start difference. First operand 318 states and 364 transitions. Second operand 48 states. [2021-01-06 10:10:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:10:04,715 INFO L93 Difference]: Finished difference Result 644 states and 693 transitions. [2021-01-06 10:10:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:10:04,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2021-01-06 10:10:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:10:04,718 INFO L225 Difference]: With dead ends: 644 [2021-01-06 10:10:04,718 INFO L226 Difference]: Without dead ends: 417 [2021-01-06 10:10:04,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:10:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-01-06 10:10:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 325. [2021-01-06 10:10:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2021-01-06 10:10:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 372 transitions. [2021-01-06 10:10:04,726 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 372 transitions. Word has length 95 [2021-01-06 10:10:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:10:04,727 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 372 transitions. [2021-01-06 10:10:04,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:10:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 372 transitions. [2021-01-06 10:10:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 10:10:04,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:10:04,727 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:10:04,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 10:10:04,941 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:10:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:10:04,942 INFO L82 PathProgramCache]: Analyzing trace with hash -23490059, now seen corresponding path program 45 times [2021-01-06 10:10:04,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:10:04,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730471602] [2021-01-06 10:10:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:10:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:10:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:10:06,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730471602] [2021-01-06 10:10:06,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304956010] [2021-01-06 10:10:06,457 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 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