/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:48:53,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:48:53,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:48:53,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:48:53,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:48:53,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:48:53,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:48:53,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:48:53,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:48:53,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:48:53,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:48:53,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:48:53,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:48:53,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:48:53,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:48:53,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:48:53,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:48:53,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:48:53,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:48:53,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:48:53,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:48:53,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:48:53,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:48:53,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:48:53,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:48:53,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:48:53,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:48:53,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:48:53,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:48:53,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:48:53,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:48:53,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:48:53,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:48:53,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:48:53,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:48:53,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:48:53,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:48:53,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:48:53,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:48:53,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:48:53,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:48:53,381 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:48:53,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:48:53,381 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:48:53,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:48:53,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:48:53,382 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:48:53,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:48:53,382 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:48:53,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:48:53,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:48:53,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:48:53,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:48:53,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:48:53,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:48:53,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:48:53,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:48:53,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:48:53,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:48:53,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:48:53,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:48:53,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:48:53,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:48:53,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:48:53,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:48:53,846 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:48:53,848 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:48:53,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2020-12-23 16:48:53,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78b3d1054/f79d2db6f6344634bd8fc74822121121/FLAGbc899badf [2020-12-23 16:48:54,612 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:48:54,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2020-12-23 16:48:54,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78b3d1054/f79d2db6f6344634bd8fc74822121121/FLAGbc899badf [2020-12-23 16:48:54,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78b3d1054/f79d2db6f6344634bd8fc74822121121 [2020-12-23 16:48:54,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:48:54,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:48:54,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:48:54,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:48:54,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:48:54,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:48:54" (1/1) ... [2020-12-23 16:48:54,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de1ddc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:54, skipping insertion in model container [2020-12-23 16:48:54,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:48:54" (1/1) ... [2020-12-23 16:48:54,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:48:54,974 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2020-12-23 16:48:55,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:48:55,336 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IntegerLiteral[1]]]]] [2020-12-23 16:48:55,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:48:55,450 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:48:55,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55 WrapperNode [2020-12-23 16:48:55,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:48:55,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:48:55,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:48:55,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:48:55,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:48:55,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:48:55,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:48:55,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:48:55,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:48:55,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:48:55,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:48:55,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:48:55,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:48:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:48:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:48:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:48:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:48:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:48:55,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:48:56,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:48:56,095 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:48:56,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:56 BoogieIcfgContainer [2020-12-23 16:48:56,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:48:56,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:48:56,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:48:56,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:48:56,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:48:54" (1/3) ... [2020-12-23 16:48:56,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b331275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:48:56, skipping insertion in model container [2020-12-23 16:48:56,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (2/3) ... [2020-12-23 16:48:56,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b331275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:48:56, skipping insertion in model container [2020-12-23 16:48:56,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:56" (3/3) ... [2020-12-23 16:48:56,107 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2020-12-23 16:48:56,115 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:48:56,121 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-23 16:48:56,143 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-23 16:48:56,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:48:56,168 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:48:56,168 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:48:56,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:48:56,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:48:56,168 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:48:56,169 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:48:56,169 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:48:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 16:48:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:56,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,213 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2020-12-23 16:48:56,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900204280] [2020-12-23 16:48:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:56,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900204280] [2020-12-23 16:48:56,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:56,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973027829] [2020-12-23 16:48:56,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:56,488 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-12-23 16:48:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:56,550 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 16:48:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:56,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:48:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:56,566 INFO L225 Difference]: With dead ends: 40 [2020-12-23 16:48:56,567 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 16:48:56,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 16:48:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2020-12-23 16:48:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:48:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 16:48:56,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 6 [2020-12-23 16:48:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:56,625 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 16:48:56,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 16:48:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:56,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:48:56,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,633 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2020-12-23 16:48:56,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403446525] [2020-12-23 16:48:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:56,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403446525] [2020-12-23 16:48:56,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:48:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727562016] [2020-12-23 16:48:56,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:48:56,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:48:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:56,735 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2020-12-23 16:48:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:56,785 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-23 16:48:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:48:56,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 16:48:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:56,789 INFO L225 Difference]: With dead ends: 22 [2020-12-23 16:48:56,789 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 16:48:56,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 16:48:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 16:48:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 16:48:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 16:48:56,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2020-12-23 16:48:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:56,796 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 16:48:56,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:48:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 16:48:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:56,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:48:56,797 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2020-12-23 16:48:56,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622271376] [2020-12-23 16:48:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622271376] [2020-12-23 16:48:56,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:56,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372299558] [2020-12-23 16:48:56,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:56,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:56,881 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-12-23 16:48:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:56,905 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-23 16:48:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:56,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:48:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:56,907 INFO L225 Difference]: With dead ends: 21 [2020-12-23 16:48:56,907 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 16:48:56,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 16:48:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 16:48:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 16:48:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 16:48:56,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2020-12-23 16:48:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:56,912 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 16:48:56,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 16:48:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:48:56,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:48:56,914 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2020-12-23 16:48:56,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938474692] [2020-12-23 16:48:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:56,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938474692] [2020-12-23 16:48:56,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:56,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69000998] [2020-12-23 16:48:56,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:48:56,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:48:56,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:56,995 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-12-23 16:48:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,050 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-23 16:48:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:57,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-23 16:48:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,052 INFO L225 Difference]: With dead ends: 35 [2020-12-23 16:48:57,052 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 16:48:57,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 16:48:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2020-12-23 16:48:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 16:48:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 16:48:57,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2020-12-23 16:48:57,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,058 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 16:48:57,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:48:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 16:48:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:48:57,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:48:57,059 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,060 INFO L82 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2020-12-23 16:48:57,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091227137] [2020-12-23 16:48:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:57,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091227137] [2020-12-23 16:48:57,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:57,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594841977] [2020-12-23 16:48:57,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:57,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:57,097 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-12-23 16:48:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,136 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-23 16:48:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:57,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 16:48:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,137 INFO L225 Difference]: With dead ends: 22 [2020-12-23 16:48:57,138 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 16:48:57,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 16:48:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 16:48:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 16:48:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 16:48:57,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2020-12-23 16:48:57,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,147 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 16:48:57,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 16:48:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:48:57,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:48:57,148 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2020-12-23 16:48:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819799150] [2020-12-23 16:48:57,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:57,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819799150] [2020-12-23 16:48:57,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:48:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94497591] [2020-12-23 16:48:57,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:48:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:48:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:48:57,266 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-12-23 16:48:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,346 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 16:48:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:57,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 16:48:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,348 INFO L225 Difference]: With dead ends: 28 [2020-12-23 16:48:57,348 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 16:48:57,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 16:48:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-12-23 16:48:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 16:48:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 16:48:57,360 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2020-12-23 16:48:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,361 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 16:48:57,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:48:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 16:48:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:48:57,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:48:57,363 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1139876333, now seen corresponding path program 1 times [2020-12-23 16:48:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915134584] [2020-12-23 16:48:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:57,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915134584] [2020-12-23 16:48:57,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:48:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937267217] [2020-12-23 16:48:57,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:48:57,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:48:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:57,569 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-12-23 16:48:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,654 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-23 16:48:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:48:57,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-23 16:48:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,655 INFO L225 Difference]: With dead ends: 31 [2020-12-23 16:48:57,656 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 16:48:57,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:48:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 16:48:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-23 16:48:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:48:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 16:48:57,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-12-23 16:48:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,660 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 16:48:57,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:48:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 16:48:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:48:57,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,661 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:48:57,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2020-12-23 16:48:57,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838871379] [2020-12-23 16:48:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:57,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838871379] [2020-12-23 16:48:57,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180156619] [2020-12-23 16:48:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:48:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:48:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:48:57,837 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:48:57,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:48:57,844 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:57,845 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:48:57,845 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:48:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:57,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:48:57,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:48:57,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375068050] [2020-12-23 16:48:57,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:48:57,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:48:57,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:48:57,892 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-12-23 16:48:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,951 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-23 16:48:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:57,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 16:48:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,952 INFO L225 Difference]: With dead ends: 38 [2020-12-23 16:48:57,952 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 16:48:57,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 16:48:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-12-23 16:48:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:48:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 16:48:57,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-23 16:48:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,956 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 16:48:57,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:48:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 16:48:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:48:57,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:58,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 16:48:58,172 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1949222959, now seen corresponding path program 1 times [2020-12-23 16:48:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:58,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92792778] [2020-12-23 16:48:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:58,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92792778] [2020-12-23 16:48:58,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:58,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:48:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238339809] [2020-12-23 16:48:58,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:48:58,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:58,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:48:58,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:48:58,297 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-12-23 16:48:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:58,453 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-23 16:48:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:48:58,453 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 16:48:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:58,456 INFO L225 Difference]: With dead ends: 36 [2020-12-23 16:48:58,457 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 16:48:58,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:48:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 16:48:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2020-12-23 16:48:58,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:48:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 16:48:58,472 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2020-12-23 16:48:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:58,472 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 16:48:58,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:48:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 16:48:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:48:58,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:58,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:58,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:48:58,475 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash -204544928, now seen corresponding path program 1 times [2020-12-23 16:48:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:58,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313521749] [2020-12-23 16:48:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:58,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313521749] [2020-12-23 16:48:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:58,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:58,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293593656] [2020-12-23 16:48:58,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:58,586 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-12-23 16:48:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:58,603 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 16:48:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:58,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 16:48:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:58,605 INFO L225 Difference]: With dead ends: 24 [2020-12-23 16:48:58,605 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 16:48:58,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 16:48:58,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 16:48:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 16:48:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 16:48:58,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-23 16:48:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:58,610 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 16:48:58,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 16:48:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:48:58,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:58,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:58,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:48:58,611 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:58,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1346179180, now seen corresponding path program 1 times [2020-12-23 16:48:58,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:58,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363862835] [2020-12-23 16:48:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:58,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363862835] [2020-12-23 16:48:58,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102156924] [2020-12-23 16:48:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:48:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:48:58,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:48:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:58,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:48:58,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 16:48:58,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446208802] [2020-12-23 16:48:58,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:48:58,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:48:58,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:48:58,913 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2020-12-23 16:48:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:59,034 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-23 16:48:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:48:59,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-23 16:48:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:59,035 INFO L225 Difference]: With dead ends: 21 [2020-12-23 16:48:59,035 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 16:48:59,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:48:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 16:48:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-23 16:48:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 16:48:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 16:48:59,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-23 16:48:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:59,038 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 16:48:59,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:48:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 16:48:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:48:59,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:59,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:59,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:48:59,254 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:48:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -893036467, now seen corresponding path program 2 times [2020-12-23 16:48:59,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:59,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959262456] [2020-12-23 16:48:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:59,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959262456] [2020-12-23 16:48:59,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841502944] [2020-12-23 16:48:59,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:48:59,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:48:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:48:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:48:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:48:59,664 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:48:59,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:48:59,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:59,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:48:59,677 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:48:59,944 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:59,944 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-23 16:48:59,946 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:48:59,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:59,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:48:59,970 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:48:59,974 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:48:59,974 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:49:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:00,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:00,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2020-12-23 16:49:00,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283674760] [2020-12-23 16:49:00,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:49:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:49:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:49:00,048 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2020-12-23 16:49:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:00,949 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-23 16:49:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:49:00,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2020-12-23 16:49:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:00,950 INFO L225 Difference]: With dead ends: 33 [2020-12-23 16:49:00,950 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:49:00,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:49:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:49:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-12-23 16:49:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 16:49:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 16:49:00,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-12-23 16:49:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:00,954 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 16:49:00,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:49:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 16:49:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:49:00,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:00,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:01,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:49:01,156 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1388594295, now seen corresponding path program 3 times [2020-12-23 16:49:01,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:01,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66022721] [2020-12-23 16:49:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:01,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66022721] [2020-12-23 16:49:01,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794593516] [2020-12-23 16:49:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:01,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:49:01,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 16:49:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:01,566 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:01,567 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:01,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:01,575 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:01,576 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:01,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:01,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:01,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:01,708 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:01,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:01,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:01,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-23 16:49:01,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621659266] [2020-12-23 16:49:01,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:49:01,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:01,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:49:01,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:49:01,714 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 19 states. [2020-12-23 16:49:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:02,082 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-23 16:49:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:02,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 16:49:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:02,083 INFO L225 Difference]: With dead ends: 38 [2020-12-23 16:49:02,083 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:49:02,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:49:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:49:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 16:49:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:49:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 16:49:02,086 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2020-12-23 16:49:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:02,087 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 16:49:02,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:49:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 16:49:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:49:02,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:02,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:02,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:02,302 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash -954145076, now seen corresponding path program 4 times [2020-12-23 16:49:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:02,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64107348] [2020-12-23 16:49:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:02,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64107348] [2020-12-23 16:49:02,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570929181] [2020-12-23 16:49:02,469 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:02,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:49:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:02,541 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:02,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:02,549 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:02,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:02,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:02,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:49:02,632 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:02,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:02,640 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:02,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:49:02,846 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:02,847 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:49:02,853 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:02,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:02,869 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:02,869 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:49:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:02,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:02,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-12-23 16:49:02,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799033529] [2020-12-23 16:49:02,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:49:02,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:49:02,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:49:02,974 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2020-12-23 16:49:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:03,628 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-23 16:49:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:03,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-12-23 16:49:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:03,630 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:49:03,630 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:49:03,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:49:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:49:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 16:49:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:49:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-23 16:49:03,633 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-12-23 16:49:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:03,634 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-23 16:49:03,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:49:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-23 16:49:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:49:03,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:03,636 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:03,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:49:03,845 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2105384571, now seen corresponding path program 5 times [2020-12-23 16:49:03,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:03,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630981638] [2020-12-23 16:49:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630981638] [2020-12-23 16:49:04,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963984232] [2020-12-23 16:49:04,076 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:04,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:49:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:49:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:04,303 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:04,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:04,309 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:04,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:04,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:04,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:04,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:04,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:04,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:04,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:04,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:04,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-12-23 16:49:04,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303508044] [2020-12-23 16:49:04,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:49:04,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:49:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:49:04,465 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 22 states. [2020-12-23 16:49:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:05,050 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 16:49:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:49:05,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-23 16:49:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:05,051 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:49:05,051 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 16:49:05,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:49:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 16:49:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 16:49:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 16:49:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 16:49:05,055 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-12-23 16:49:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:05,056 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 16:49:05,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:49:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 16:49:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:49:05,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:05,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:05,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:05,260 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1625083528, now seen corresponding path program 6 times [2020-12-23 16:49:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:05,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245734691] [2020-12-23 16:49:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:05,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245734691] [2020-12-23 16:49:05,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139230600] [2020-12-23 16:49:05,484 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:05,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:49:05,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:05,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:49:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:05,570 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:05,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:05,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:05,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:05,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-12-23 16:49:05,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460074179] [2020-12-23 16:49:05,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:49:05,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:49:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:49:05,939 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 24 states. [2020-12-23 16:49:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:06,495 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 16:49:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:06,496 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-12-23 16:49:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:06,497 INFO L225 Difference]: With dead ends: 36 [2020-12-23 16:49:06,497 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 16:49:06,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:49:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 16:49:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-23 16:49:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 16:49:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-23 16:49:06,500 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-12-23 16:49:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:06,501 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-23 16:49:06,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:49:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-23 16:49:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 16:49:06,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:06,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:06,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:49:06,718 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1662825919, now seen corresponding path program 7 times [2020-12-23 16:49:06,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:06,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340200630] [2020-12-23 16:49:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:07,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340200630] [2020-12-23 16:49:07,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668430882] [2020-12-23 16:49:07,030 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 16:49:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:07,333 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:07,335 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:07,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:07,344 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:07,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:07,495 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:07,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:07,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:07,498 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:07,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:07,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:07,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-23 16:49:07,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411575254] [2020-12-23 16:49:07,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:49:07,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:49:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:49:07,510 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 25 states. [2020-12-23 16:49:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:08,151 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-23 16:49:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:49:08,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-12-23 16:49:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:08,152 INFO L225 Difference]: With dead ends: 54 [2020-12-23 16:49:08,152 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:49:08,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:49:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:49:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-12-23 16:49:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 16:49:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 16:49:08,156 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2020-12-23 16:49:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:08,156 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 16:49:08,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:49:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 16:49:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 16:49:08,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:08,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:08,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:49:08,371 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1974118660, now seen corresponding path program 8 times [2020-12-23 16:49:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:08,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182608512] [2020-12-23 16:49:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:08,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182608512] [2020-12-23 16:49:08,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080121928] [2020-12-23 16:49:08,590 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:08,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:08,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:08,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:49:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:08,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:08,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-23 16:49:08,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784607864] [2020-12-23 16:49:08,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:49:08,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:49:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:49:08,929 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 24 states. [2020-12-23 16:49:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:09,380 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 16:49:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:49:09,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-12-23 16:49:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:09,381 INFO L225 Difference]: With dead ends: 42 [2020-12-23 16:49:09,381 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:49:09,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:49:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:49:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 16:49:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 16:49:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-23 16:49:09,385 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-12-23 16:49:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:09,385 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-23 16:49:09,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:49:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-23 16:49:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:49:09,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:09,387 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:09,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:49:09,600 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:09,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1247513155, now seen corresponding path program 9 times [2020-12-23 16:49:09,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:09,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115100220] [2020-12-23 16:49:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:09,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115100220] [2020-12-23 16:49:09,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609850188] [2020-12-23 16:49:09,913 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:10,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:49:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:49:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:10,257 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:10,257 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:10,266 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:10,267 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:10,425 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:10,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:10,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,432 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:10,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:10,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-23 16:49:10,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097858904] [2020-12-23 16:49:10,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:49:10,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:10,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:49:10,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:49:10,441 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 28 states. [2020-12-23 16:49:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:11,251 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 16:49:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:49:11,252 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 40 [2020-12-23 16:49:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:11,253 INFO L225 Difference]: With dead ends: 62 [2020-12-23 16:49:11,253 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:49:11,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:49:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:49:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-12-23 16:49:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:49:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 16:49:11,257 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-12-23 16:49:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:11,257 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 16:49:11,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:49:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 16:49:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 16:49:11,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:11,259 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:11,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:11,470 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1917613632, now seen corresponding path program 10 times [2020-12-23 16:49:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639416102] [2020-12-23 16:49:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:11,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639416102] [2020-12-23 16:49:11,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965317424] [2020-12-23 16:49:11,753 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:11,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:11,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 16:49:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:11,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:11,862 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:11,869 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:11,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:11,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:11,987 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:49:11,988 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:11,994 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:11,996 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:11,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:49:12,377 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:12,377 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:49:12,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:12,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:12,393 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:12,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:49:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:12,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:12,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2020-12-23 16:49:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542414063] [2020-12-23 16:49:12,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:49:12,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:12,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:49:12,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:49:12,516 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 29 states. [2020-12-23 16:49:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:13,773 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-23 16:49:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:49:13,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-12-23 16:49:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:13,775 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:49:13,775 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:49:13,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:49:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:49:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 16:49:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:49:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-23 16:49:13,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-12-23 16:49:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:13,780 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-23 16:49:13,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:49:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-23 16:49:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:49:13,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:13,781 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:13,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:13,993 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash 285729785, now seen corresponding path program 11 times [2020-12-23 16:49:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:13,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818157941] [2020-12-23 16:49:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:14,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818157941] [2020-12-23 16:49:14,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88654505] [2020-12-23 16:49:14,393 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:14,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 16:49:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 16:49:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:14,838 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:14,839 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:14,844 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:14,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:14,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:15,023 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:15,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:15,026 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:15,027 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:15,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:15,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:15,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-12-23 16:49:15,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509618443] [2020-12-23 16:49:15,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:49:15,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:15,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:49:15,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:49:15,034 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 31 states. [2020-12-23 16:49:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:16,153 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-23 16:49:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:49:16,154 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2020-12-23 16:49:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:16,154 INFO L225 Difference]: With dead ends: 70 [2020-12-23 16:49:16,155 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:49:16,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:49:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:49:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-23 16:49:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:49:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 16:49:16,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2020-12-23 16:49:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:16,158 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 16:49:16,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:49:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 16:49:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:49:16,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:16,160 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:16,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:16,372 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1048562116, now seen corresponding path program 12 times [2020-12-23 16:49:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:16,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851748523] [2020-12-23 16:49:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:16,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851748523] [2020-12-23 16:49:16,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726533062] [2020-12-23 16:49:16,710 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:16,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 16:49:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:49:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:16,819 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:16,820 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:16,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:16,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:16,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:17,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:17,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2020-12-23 16:49:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177627822] [2020-12-23 16:49:17,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:49:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:49:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:49:17,429 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2020-12-23 16:49:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:18,434 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-23 16:49:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:49:18,436 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2020-12-23 16:49:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:18,437 INFO L225 Difference]: With dead ends: 54 [2020-12-23 16:49:18,437 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:49:18,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:49:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:49:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-23 16:49:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:49:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-23 16:49:18,441 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-12-23 16:49:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:18,441 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-23 16:49:18,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:49:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-23 16:49:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 16:49:18,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:18,442 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:18,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:49:18,658 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1649120501, now seen corresponding path program 13 times [2020-12-23 16:49:18,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:18,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152729947] [2020-12-23 16:49:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152729947] [2020-12-23 16:49:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107417986] [2020-12-23 16:49:19,093 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:49:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:19,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:19,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:19,508 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:19,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:19,510 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:49:20,361 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:20,362 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-23 16:49:20,364 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:20,377 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:20,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:49:20,382 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:49:20,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:20,385 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:49:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:20,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:20,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2020-12-23 16:49:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952685767] [2020-12-23 16:49:20,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 16:49:20,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 16:49:20,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:49:20,539 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 42 states. [2020-12-23 16:49:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:24,234 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-12-23 16:49:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:49:24,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 52 [2020-12-23 16:49:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:24,235 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:49:24,236 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:49:24,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=578, Invalid=3978, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:49:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:49:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-12-23 16:49:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:49:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-23 16:49:24,239 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 52 [2020-12-23 16:49:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:24,239 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-23 16:49:24,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 16:49:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-23 16:49:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 16:49:24,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:24,240 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:24,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:24,455 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1873381553, now seen corresponding path program 14 times [2020-12-23 16:49:24,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:24,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103128875] [2020-12-23 16:49:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:25,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103128875] [2020-12-23 16:49:25,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441972651] [2020-12-23 16:49:25,028 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:25,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:25,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 16:49:25,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:25,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:25,538 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:25,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:25,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:25,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:49:26,530 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:26,531 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-23 16:49:26,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:26,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:26,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:49:26,552 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:49:26,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:26,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:49:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:26,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:26,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2020-12-23 16:49:26,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999029208] [2020-12-23 16:49:26,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:49:26,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:49:26,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1912, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:49:26,717 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 46 states. [2020-12-23 16:49:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:40,733 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-12-23 16:49:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 16:49:40,734 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 58 [2020-12-23 16:49:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:40,735 INFO L225 Difference]: With dead ends: 89 [2020-12-23 16:49:40,735 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 16:49:40,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=665, Invalid=4737, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:49:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 16:49:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-12-23 16:49:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:49:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-12-23 16:49:40,738 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2020-12-23 16:49:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:40,739 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-12-23 16:49:40,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:49:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-12-23 16:49:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 16:49:40,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:40,740 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:40,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:49:40,947 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1985462061, now seen corresponding path program 15 times [2020-12-23 16:49:40,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:40,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643141175] [2020-12-23 16:49:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:41,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643141175] [2020-12-23 16:49:41,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114699746] [2020-12-23 16:49:41,649 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:41,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 16:49:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 16:49:41,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:42,422 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:42,423 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:42,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:42,433 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:42,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:42,681 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:42,682 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:42,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:42,685 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:42,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:42,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:42,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2020-12-23 16:49:42,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715469968] [2020-12-23 16:49:42,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 16:49:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 16:49:42,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1466, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:49:42,698 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 40 states. [2020-12-23 16:49:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:44,622 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-23 16:49:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:49:44,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 64 [2020-12-23 16:49:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:44,624 INFO L225 Difference]: With dead ends: 94 [2020-12-23 16:49:44,624 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 16:49:44,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:49:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 16:49:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-23 16:49:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:49:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 16:49:44,628 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2020-12-23 16:49:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:44,628 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 16:49:44,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 16:49:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 16:49:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 16:49:44,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:44,629 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:44,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:44,838 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:44,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:44,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1605838512, now seen corresponding path program 16 times [2020-12-23 16:49:44,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:44,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808004221] [2020-12-23 16:49:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808004221] [2020-12-23 16:49:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696208412] [2020-12-23 16:49:45,461 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:45,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:45,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 16:49:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:45,572 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:45,573 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:45,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:45,580 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:45,580 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:45,723 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:49:45,724 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:45,733 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:45,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:45,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:49:46,543 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:46,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:49:46,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:46,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:46,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:46,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:49:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 162 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:46,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:46,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 40 [2020-12-23 16:49:46,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286810334] [2020-12-23 16:49:46,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 16:49:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 16:49:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:49:46,761 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-12-23 16:49:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:49,545 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-12-23 16:49:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:49:49,545 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 68 [2020-12-23 16:49:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:49,546 INFO L225 Difference]: With dead ends: 72 [2020-12-23 16:49:49,546 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 16:49:49,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=435, Invalid=2645, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:49:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 16:49:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-23 16:49:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 16:49:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-12-23 16:49:49,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-12-23 16:49:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:49,550 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-12-23 16:49:49,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 16:49:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-12-23 16:49:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 16:49:49,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:49,551 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:49,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:49:49,760 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1317550185, now seen corresponding path program 17 times [2020-12-23 16:49:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:49,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150913335] [2020-12-23 16:49:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:50,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150913335] [2020-12-23 16:49:50,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633787917] [2020-12-23 16:49:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:50,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 16:49:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 16:49:50,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:51,391 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:49:51,392 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:51,398 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:51,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:51,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:51,657 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:49:51,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:51,665 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:51,665 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:51,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:51,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:51,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2020-12-23 16:49:51,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649972366] [2020-12-23 16:49:51,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:49:51,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:49:51,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:49:51,677 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 43 states. [2020-12-23 16:49:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:53,889 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-12-23 16:49:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:49:53,889 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 70 [2020-12-23 16:49:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:53,891 INFO L225 Difference]: With dead ends: 102 [2020-12-23 16:49:53,891 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 16:49:53,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=259, Invalid=3047, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 16:49:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 16:49:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-12-23 16:49:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:49:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-23 16:49:53,895 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2020-12-23 16:49:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:53,896 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-23 16:49:53,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:49:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-23 16:49:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 16:49:53,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:53,897 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:54,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 16:49:54,100 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash 676245932, now seen corresponding path program 18 times [2020-12-23 16:49:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:54,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359174703] [2020-12-23 16:49:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:54,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359174703] [2020-12-23 16:49:54,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282161278] [2020-12-23 16:49:54,820 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:55,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-23 16:49:55,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 16:49:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:55,049 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:49:55,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:55,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:55,059 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:55,060 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:49:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:56,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:56,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2020-12-23 16:49:56,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660611044] [2020-12-23 16:49:56,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 16:49:56,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 16:49:56,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2314, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 16:49:56,516 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 52 states. [2020-12-23 16:49:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:58,821 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-12-23 16:49:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:49:58,822 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 74 [2020-12-23 16:49:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:58,823 INFO L225 Difference]: With dead ends: 78 [2020-12-23 16:49:58,823 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 16:49:58,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=788, Invalid=3372, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 16:49:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 16:49:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-23 16:49:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 16:49:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-12-23 16:49:58,829 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-12-23 16:49:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:58,829 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-12-23 16:49:58,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 16:49:58,830 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-12-23 16:49:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 16:49:58,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:58,830 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:59,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:49:59,044 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1332278373, now seen corresponding path program 19 times [2020-12-23 16:49:59,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:59,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164270225] [2020-12-23 16:49:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:59,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164270225] [2020-12-23 16:49:59,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77985491] [2020-12-23 16:49:59,974 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 16:50:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:00,939 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:50:00,940 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:00,949 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:00,951 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:50:00,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:50:01,248 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:50:01,249 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:01,251 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:01,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:01,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:50:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:01,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:01,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 46 [2020-12-23 16:50:01,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681717855] [2020-12-23 16:50:01,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:50:01,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:01,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:50:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1962, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:50:01,265 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 46 states. [2020-12-23 16:50:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:04,210 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2020-12-23 16:50:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:50:04,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 76 [2020-12-23 16:50:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:04,214 INFO L225 Difference]: With dead ends: 110 [2020-12-23 16:50:04,214 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:50:04,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=277, Invalid=3505, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:50:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:50:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-12-23 16:50:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 16:50:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-23 16:50:04,218 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-12-23 16:50:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:04,219 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-23 16:50:04,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:50:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-23 16:50:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 16:50:04,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:04,220 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:04,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:50:04,428 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash -420335768, now seen corresponding path program 20 times [2020-12-23 16:50:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:04,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697081750] [2020-12-23 16:50:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:05,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697081750] [2020-12-23 16:50:05,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586891435] [2020-12-23 16:50:05,399 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:05,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:50:05,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 16:50:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:06,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:06,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 44 [2020-12-23 16:50:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848126847] [2020-12-23 16:50:06,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 16:50:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 16:50:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:50:06,452 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 45 states. [2020-12-23 16:50:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:08,376 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-12-23 16:50:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:50:08,377 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 80 [2020-12-23 16:50:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:08,378 INFO L225 Difference]: With dead ends: 84 [2020-12-23 16:50:08,378 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:50:08,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=727, Invalid=2695, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 16:50:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:50:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 16:50:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 16:50:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-12-23 16:50:08,381 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-12-23 16:50:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:08,381 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-12-23 16:50:08,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 16:50:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-12-23 16:50:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 16:50:08,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:08,382 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:08,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:08,597 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:08,598 INFO L82 PathProgramCache]: Analyzing trace with hash -215747807, now seen corresponding path program 21 times [2020-12-23 16:50:08,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:08,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599755485] [2020-12-23 16:50:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:09,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599755485] [2020-12-23 16:50:09,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492147207] [2020-12-23 16:50:09,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:10,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 16:50:10,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 16:50:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:11,318 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:50:11,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:11,327 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:11,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:50:11,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:50:11,626 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:50:11,627 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:11,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:11,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:11,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:50:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:11,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:11,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 49 [2020-12-23 16:50:11,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609919743] [2020-12-23 16:50:11,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 16:50:11,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 16:50:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2237, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:50:11,644 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 49 states. [2020-12-23 16:50:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:15,048 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-12-23 16:50:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:50:15,049 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 82 [2020-12-23 16:50:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:15,050 INFO L225 Difference]: With dead ends: 118 [2020-12-23 16:50:15,050 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:50:15,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 16:50:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:50:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-23 16:50:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:50:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-23 16:50:15,053 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2020-12-23 16:50:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:15,054 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-23 16:50:15,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 16:50:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-23 16:50:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 16:50:15,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:15,054 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:15,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:15,256 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1371037724, now seen corresponding path program 22 times [2020-12-23 16:50:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:15,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508708515] [2020-12-23 16:50:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:16,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508708515] [2020-12-23 16:50:16,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398860803] [2020-12-23 16:50:16,283 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:16,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:50:16,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 16:50:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:16,409 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:50:16,409 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:16,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:16,417 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:16,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:16,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:50:16,594 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:16,602 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:16,603 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:16,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:50:17,868 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:17,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:50:17,871 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:50:17,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:17,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:17,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:50:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 288 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:18,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:18,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 49 [2020-12-23 16:50:18,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513253663] [2020-12-23 16:50:18,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:50:18,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:18,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:50:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:50:18,118 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 50 states. [2020-12-23 16:50:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:22,263 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-12-23 16:50:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:50:22,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-12-23 16:50:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:22,264 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:50:22,264 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:50:22,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=606, Invalid=3950, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:50:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:50:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-23 16:50:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 16:50:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-12-23 16:50:22,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-12-23 16:50:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:22,269 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-12-23 16:50:22,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:50:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-12-23 16:50:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 16:50:22,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:22,269 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:22,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 16:50:22,485 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 987706525, now seen corresponding path program 23 times [2020-12-23 16:50:22,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:22,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352147029] [2020-12-23 16:50:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:23,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352147029] [2020-12-23 16:50:23,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14184167] [2020-12-23 16:50:23,670 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:23,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 16:50:23,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-23 16:50:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:23,880 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:50:23,881 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:23,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:23,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:23,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:25,064 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:50:25,066 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:25,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:25,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:25,077 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 16:50:26,791 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:26,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:50:26,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:50:26,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:26,808 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:26,808 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-12-23 16:50:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 276 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:27,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:27,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 65 [2020-12-23 16:50:27,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168362649] [2020-12-23 16:50:27,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 16:50:27,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 16:50:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3954, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 16:50:27,132 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2020-12-23 16:50:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:36,287 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2020-12-23 16:50:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 16:50:36,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2020-12-23 16:50:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:36,289 INFO L225 Difference]: With dead ends: 129 [2020-12-23 16:50:36,289 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 16:50:36,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1200, Invalid=11910, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 16:50:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 16:50:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-12-23 16:50:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 16:50:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-12-23 16:50:36,294 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2020-12-23 16:50:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:36,295 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-12-23 16:50:36,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 16:50:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-12-23 16:50:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 16:50:36,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:36,296 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:36,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:36,499 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash -759383847, now seen corresponding path program 24 times [2020-12-23 16:50:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:36,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256361517] [2020-12-23 16:50:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256361517] [2020-12-23 16:50:37,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179749570] [2020-12-23 16:50:37,988 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:38,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 16:50:38,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 16:50:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:39,667 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:50:39,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:39,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:39,679 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:50:39,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:50:40,049 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:50:40,053 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:40,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:40,056 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:40,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:50:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:40,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:40,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 55 [2020-12-23 16:50:40,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918730575] [2020-12-23 16:50:40,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 16:50:40,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:40,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 16:50:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 16:50:40,075 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 55 states. [2020-12-23 16:50:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:44,895 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2020-12-23 16:50:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:50:44,896 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 94 [2020-12-23 16:50:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:44,898 INFO L225 Difference]: With dead ends: 134 [2020-12-23 16:50:44,898 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 16:50:44,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=331, Invalid=5071, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:50:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 16:50:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-12-23 16:50:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 16:50:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-12-23 16:50:44,902 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2020-12-23 16:50:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:44,902 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-12-23 16:50:44,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 16:50:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-12-23 16:50:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 16:50:44,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:44,903 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:45,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:50:45,107 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1483974372, now seen corresponding path program 25 times [2020-12-23 16:50:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:45,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324013919] [2020-12-23 16:50:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 325 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:46,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324013919] [2020-12-23 16:50:46,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167119098] [2020-12-23 16:50:46,387 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 16:50:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 378 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:47,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:47,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 53 [2020-12-23 16:50:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180657240] [2020-12-23 16:50:47,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 16:50:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 16:50:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:50:47,693 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 54 states. [2020-12-23 16:50:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:50,412 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-12-23 16:50:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:50:50,413 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 98 [2020-12-23 16:50:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:50,414 INFO L225 Difference]: With dead ends: 102 [2020-12-23 16:50:50,414 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 16:50:50,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1057, Invalid=3913, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 16:50:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 16:50:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 16:50:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 16:50:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-12-23 16:50:50,418 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-12-23 16:50:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:50,418 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-12-23 16:50:50,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 16:50:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-12-23 16:50:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 16:50:50,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:50,419 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:50,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:50:50,633 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:50:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash -170229803, now seen corresponding path program 26 times [2020-12-23 16:50:50,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:50,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638509998] [2020-12-23 16:50:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:52,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638509998] [2020-12-23 16:50:52,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501388050] [2020-12-23 16:50:52,258 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:52,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:50:52,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 16:50:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:52,398 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:50:52,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:52,409 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:52,413 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:52,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:50:54,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:50:54,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:54,123 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:54,128 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:54,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 16:50:57,416 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:57,416 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2020-12-23 16:50:57,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:50:57,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:57,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:50:57,442 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:57,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:37 [2020-12-23 16:50:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 378 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:57,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:57,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 74 [2020-12-23 16:50:57,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422236106] [2020-12-23 16:50:57,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 16:50:57,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 16:50:57,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=5150, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:50:57,916 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 74 states. [2020-12-23 16:51:03,811 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-23 16:51:05,180 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:06,812 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:07,385 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:08,492 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:09,056 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:09,619 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:10,193 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:51:11,336 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-23 16:51:12,202 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-23 16:51:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:13,238 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-12-23 16:51:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 16:51:13,239 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-12-23 16:51:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:13,240 INFO L225 Difference]: With dead ends: 145 [2020-12-23 16:51:13,240 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 16:51:13,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=1485, Invalid=15545, Unknown=0, NotChecked=0, Total=17030 [2020-12-23 16:51:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 16:51:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-12-23 16:51:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 16:51:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-12-23 16:51:13,244 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 100 [2020-12-23 16:51:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:13,244 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-12-23 16:51:13,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 16:51:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-12-23 16:51:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 16:51:13,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:13,245 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:13,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:51:13,456 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash 307399057, now seen corresponding path program 27 times [2020-12-23 16:51:13,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:13,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830183413] [2020-12-23 16:51:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:15,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830183413] [2020-12-23 16:51:15,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385825781] [2020-12-23 16:51:15,316 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:15,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 16:51:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-23 16:51:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:17,484 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:51:17,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:17,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:17,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:51:17,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:51:17,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:51:17,908 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:17,910 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:17,911 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:17,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:51:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:17,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:17,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 61 [2020-12-23 16:51:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214979633] [2020-12-23 16:51:17,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 16:51:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 16:51:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3517, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 16:51:17,931 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 61 states. [2020-12-23 16:51:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:23,793 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2020-12-23 16:51:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:51:23,794 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 106 [2020-12-23 16:51:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:23,796 INFO L225 Difference]: With dead ends: 150 [2020-12-23 16:51:23,796 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 16:51:23,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=367, Invalid=6275, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 16:51:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 16:51:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-12-23 16:51:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 16:51:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-12-23 16:51:23,805 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2020-12-23 16:51:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:23,805 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-12-23 16:51:23,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 16:51:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-12-23 16:51:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 16:51:23,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:23,806 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:24,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:51:24,008 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2029837652, now seen corresponding path program 28 times [2020-12-23 16:51:24,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:24,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988737009] [2020-12-23 16:51:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 435 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:25,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988737009] [2020-12-23 16:51:25,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121808052] [2020-12-23 16:51:25,656 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:25,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:51:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 16:51:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:25,793 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:51:25,794 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:25,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:25,805 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:25,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:51:26,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:51:26,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:26,085 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:26,086 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:26,086 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:51:28,456 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:28,457 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:51:28,459 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:51:28,479 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:28,481 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:28,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:51:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 512 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:28,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:28,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40] total 61 [2020-12-23 16:51:28,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719342770] [2020-12-23 16:51:28,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 16:51:28,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:28,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 16:51:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3520, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:51:28,857 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 62 states. [2020-12-23 16:51:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:36,846 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-12-23 16:51:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:51:36,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 110 [2020-12-23 16:51:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:36,849 INFO L225 Difference]: With dead ends: 114 [2020-12-23 16:51:36,849 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 16:51:36,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 16:51:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 16:51:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-23 16:51:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 16:51:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-12-23 16:51:36,853 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-12-23 16:51:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:36,854 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-12-23 16:51:36,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 16:51:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-12-23 16:51:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 16:51:36,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:36,855 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:37,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:51:37,069 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash 758830605, now seen corresponding path program 29 times [2020-12-23 16:51:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:37,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77766695] [2020-12-23 16:51:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 18 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:39,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77766695] [2020-12-23 16:51:39,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647398220] [2020-12-23 16:51:39,295 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:39,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 16:51:39,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-23 16:51:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:41,737 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:51:41,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:41,749 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:41,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:51:41,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:51:42,237 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:51:42,239 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:42,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:42,243 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:42,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:51:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 18 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:42,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:42,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 64 [2020-12-23 16:51:42,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343009169] [2020-12-23 16:51:42,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 16:51:42,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 16:51:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3882, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:51:42,277 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 64 states. [2020-12-23 16:51:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:49,143 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2020-12-23 16:51:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 16:51:49,144 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 112 [2020-12-23 16:51:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:49,145 INFO L225 Difference]: With dead ends: 158 [2020-12-23 16:51:49,145 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 16:51:49,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=385, Invalid=6925, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 16:51:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 16:51:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-12-23 16:51:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 16:51:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-12-23 16:51:49,149 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2020-12-23 16:51:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:49,149 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-12-23 16:51:49,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 16:51:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-12-23 16:51:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 16:51:49,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:49,150 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:49,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:49,351 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:51:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1559890832, now seen corresponding path program 30 times [2020-12-23 16:51:49,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:49,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072717230] [2020-12-23 16:51:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 496 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:51,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072717230] [2020-12-23 16:51:51,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756554122] [2020-12-23 16:51:51,407 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:53,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 16:51:53,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:51:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:53,097 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:51:53,098 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:53,106 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:53,107 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:53,107 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:51:53,299 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 16:51:53,301 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:53,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:53,306 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:53,306 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:51:53,543 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:53,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:51:53,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:51:53,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:53,561 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:53,562 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2020-12-23 16:51:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2020-12-23 16:51:53,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:53,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 6] total 45 [2020-12-23 16:51:53,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912156092] [2020-12-23 16:51:53,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:51:53,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:51:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:51:53,808 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 46 states. [2020-12-23 16:51:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:58,286 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2020-12-23 16:51:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 16:51:58,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 116 [2020-12-23 16:51:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:58,288 INFO L225 Difference]: With dead ends: 117 [2020-12-23 16:51:58,288 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 16:51:58,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:51:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 16:51:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 16:51:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 16:51:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 16:51:58,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2020-12-23 16:51:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:58,290 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 16:51:58,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:51:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 16:51:58,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 16:51:58,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 16:51:58,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:51:58 BoogieIcfgContainer [2020-12-23 16:51:58,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:51:58,500 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:51:58,500 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:51:58,501 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:51:58,501 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:56" (3/4) ... [2020-12-23 16:51:58,505 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 16:51:58,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 16:51:58,521 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-23 16:51:58,521 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 16:51:58,573 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/cstrlen-alloca-2.i-witness.graphml [2020-12-23 16:51:58,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:51:58,574 INFO L168 Benchmark]: Toolchain (without parser) took 183655.95 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 125.4 MB in the beginning and 273.4 MB in the end (delta: -148.0 MB). Peak memory consumption was 25.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,575 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.6 MB in the beginning and 123.5 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:51:58,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 534.70 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 104.8 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,576 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.90 ms. Allocated memory is still 151.0 MB. Free memory was 104.8 MB in the beginning and 102.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,576 INFO L168 Benchmark]: Boogie Preprocessor took 40.65 ms. Allocated memory is still 151.0 MB. Free memory was 102.9 MB in the beginning and 101.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,576 INFO L168 Benchmark]: RCFGBuilder took 549.07 ms. Allocated memory is still 151.0 MB. Free memory was 101.6 MB in the beginning and 120.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,577 INFO L168 Benchmark]: TraceAbstraction took 182401.05 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 120.1 MB in the beginning and 276.2 MB in the end (delta: -156.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,577 INFO L168 Benchmark]: Witness Printer took 73.19 ms. Allocated memory is still 324.0 MB. Free memory was 276.2 MB in the beginning and 273.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:51:58,579 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.6 MB in the beginning and 123.5 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 534.70 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 104.8 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.90 ms. Allocated memory is still 151.0 MB. Free memory was 104.8 MB in the beginning and 102.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.65 ms. Allocated memory is still 151.0 MB. Free memory was 102.9 MB in the beginning and 101.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 549.07 ms. Allocated memory is still 151.0 MB. Free memory was 101.6 MB in the beginning and 120.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 182401.05 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 120.1 MB in the beginning and 276.2 MB in the end (delta: -156.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. * Witness Printer took 73.19 ms. Allocated memory is still 324.0 MB. Free memory was 276.2 MB in the beginning and 273.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 182.3s, OverallIterations: 40, TraceHistogramMax: 18, AutomataDifference: 105.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 540 SDtfs, 4947 SDslu, 11616 SDs, 0 SdLazy, 49720 SolverSat, 3187 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 46.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3206 GetRequests, 1474 SyntacticMatches, 17 SemanticMatches, 1715 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13842 ImplicationChecksByTransitivity, 97.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 129 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 62.0s InterpolantComputationTime, 3940 NumberOfCodeBlocks, 3886 NumberOfCodeBlocksAsserted, 234 NumberOfCheckSat, 3869 ConstructedInterpolants, 105 QuantifiedInterpolants, 2861933 SizeOfPredicates, 327 NumberOfNonLiveVariables, 7466 ConjunctsInSsa, 2044 ConjunctsInUnsatCore, 71 InterpolantComputations, 9 PerfectInterpolantSequences, 5997/19860 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...